阵列
该文件涵盖了基本的阵列操作,包括创建、读取、修改和各种操作,例如查找位置、反转以及在特定位置插入和删除值。
创造
设置数位数位数位数位阵组
将清单设置为阵列
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable></variables><block type=\"variables_set\" disabled=\"true\" x=\"-23\" y=\"68\"><field name=\"VAR\">list</field><value name=\"VALUE\"><block type=\"lists_create_with\" disabled=\"true\"><mutation items=\"2\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"math_number\" disabled=\"true\"><field name=\"NUM\">0</field></shadow></value><value name=\"ADD1\"><shadow type=\"math_number\" disabled=\"true\"><field name=\"NUM\">1</field></shadow></value></block></value></block></xml>"}
此块用于将数位阵列设置为变数。
参数: 数字(预设值:0, 1)
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>value</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"2\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"ADD1\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><next><block type=\"pxt_controls_for_of\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">value</field></shadow></value><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><statement name=\"DO\"><block type=\"basic_consoleLogNum\"><value name=\"num\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">value</field></block></value></block></value></block></statement></block></next></block></statement></block></xml>"}
输出:
设置文字阵列
将文字清单设置为阵列
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>value</variable><variable>text list</variable></variables><block type=\"variables_set\" disabled=\"true\" x=\"70\" y=\"284\"><field name=\"VAR\">text list</field><value name=\"VALUE\"><block type=\"lists_create_with\" disabled=\"true\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\" disabled=\"true\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\" disabled=\"true\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\" disabled=\"true\"><field name=\"TEXT\">c</field></shadow></value></block></value></block></xml>"}
此块用于将文字阵列设置为变数。
参数: 字串(预设值:a、b、c)
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></statement></block></xml>"}
输出:
创建新阵列
空阵列
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable></variables><block type=\"lists_create_with\" disabled=\"true\" x=\"-22\" y=\"292\"><mutation items=\"0\" horizontalafter=\"3\"/></block></xml>"}
此块用于创建新阵列。
参数: 屏幕专案
输出: 阵列
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>array</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"22\" y=\"383\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">array</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"2\" horizontalafter=\"3\"/><value name=\"ADD0\"><block type=\"text\"><field name=\"TEXT\">text 1</field></block></value><value name=\"ADD1\"><block type=\"text\"><field name=\"TEXT\">text 2</field></block></value></block></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">array</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">array</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></statement></block></xml>"}
输出:
读
计算数位的长度
阵列清单的长度
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>array</variable><variable>index</variable><variable>list</variable></variables><block type=\"lists_length\" disabled=\"true\" x=\"112\" y=\"293\"><value name=\"VALUE\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于显示阵列中的项目数。
参数: 萤幕项目(阵列)
输出: 数
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"basic_consoleLogNum\"><value name=\"num\"><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value></block></next></block></statement></block></xml>"}
输出:
显示带有所选索引的值
清单获取值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>list</variable></variables><block type=\"lists_index_get\" disabled=\"true\" x=\"-22\" y=\"472\"><value name=\"LIST\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\" disabled=\"true\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于显示阵列中给定索引处的值。
参数:
- 萤幕项目(阵列)
- 数
输出: 屏幕专案
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></next></block></statement></block></xml>"}
输出:
显示将被删除的值
列出 get 和 remove 值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>list</variable></variables><block type=\"array_removeat\" disabled=\"true\" x=\"-22\" y=\"338\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value><value name=\"index\"><shadow type=\"math_number\" disabled=\"true\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
这个块用于显示和删除特定索引处的值。
参数:
- 萤幕项目(阵列)
- 数
输出: 屏幕专案
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"array_removeat\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"index\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value></block></next></block></statement></block></xml>"}
输出:
显示和删除最后一项
从清单中获取和删除最后一个值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>list</variable></variables><block type=\"array_pop\" disabled=\"true\" x=\"-22\" y=\"383\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
这个块用于显示和删除阵列内的最后一个值。
参数: 萤幕项目(阵列)
输出: 屏幕专案
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"array_removeat\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"index\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value></block></next></block></statement></block></xml>"}
输出:
显示和删除第一项
从清单中获取和删除第一个值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>list</variable></variables><block type=\"array_shift\" disabled=\"true\" x=\"-22\" y=\"338\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于显示和删除阵列内的第一个值。
参数: 萤幕项目(阵列)
输出: 屏幕专案
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"array_shift\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value><next><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"typescript_expression\"><field name=\"EXPRESSION\">\"After removing th e value, the remaining values are:\"</field></block></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
显示随机值
从清单中获取随机值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable><variable>list</variable></variables><block type=\"array_pickRandom\" disabled=\"true\" x=\"-22\" y=\"652\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
修改
修改数位内部的值
列出 0 到 ? 处的设置值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable><variable>list</variable></variables><block type=\"lists_index_set\" disabled=\"true\" x=\"23\" y=\"563\"><value name=\"LIST\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\" disabled=\"true\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于修改数位中选定位置的值。
参数: 萤幕项目(阵列)
条件:
- 数字(预设值:0)
- 屏幕专案
输出: N/A
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"lists_index_set\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"VALUE\"><shadow type=\"text\"><field name=\"TEXT\">d</field></shadow></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
在末尾插入值
清单增加价值…结束
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable><variable>list</variable></variables><block type=\"array_push\" disabled=\"true\" x=\"23\" y=\"292\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于将阵列末尾的值相加。
参数:
- 萤幕项目(阵列)
- 屏幕专案
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"array_push\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"value\"><shadow type=\"text\"><field name=\"TEXT\">END</field></shadow></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
删除最后一个值
从清单中删除最后一个值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable><variable>list</variable></variables><block type=\"array_pop_statement\" disabled=\"true\" x=\"23\" y=\"518\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
这个块用于删除阵列中的最后一个值。
参数:
- 萤幕项目(阵列)
- 屏幕专案
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"array_pop_statement\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
删除第一个值
从清单中删除第一个值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable><variable>list</variable></variables><block type=\"array_shift_statement\" disabled=\"true\" x=\"23\" y=\"472\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于删除阵列中的第一个值。
参数:
- 萤幕项目(阵列)
- 屏幕专案
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">text_list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"array_shift_statement\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">text_list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
在开始时增加价值
清单插入…开始时
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>text_list</variable><variable>index</variable><variable>list</variable></variables><block type=\"array_unshift\" disabled=\"true\" x=\"-22\" y=\"427\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于在阵列的开头添加一个值。
参数:
- 萤幕项目(阵列)
- 屏幕专案
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>insert</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">insert</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"array_unshift\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"value\"><shadow type=\"text\"><field name=\"TEXT\">START</field></shadow></value></block></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
在开头插入值
清单插入到开头
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>insert</variable><variable>index</variable></variables><block type=\"array_unshift_statement\" disabled=\"true\" x=\"23\" y=\"517\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于在阵列的开头添加一个值。
参数:
- 萤幕项目(阵列)
- 屏幕专案
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"array_unshift_statement\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"value\"><shadow type=\"text\"><field name=\"TEXT\">START</field></shadow></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
在特定的地方增加价值
清单插入值为 0
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>index</variable></variables><block type=\"array_insertAt\" disabled=\"true\" x=\"23\" y=\"607\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value><value name=\"index\"><shadow type=\"math_number\" disabled=\"true\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于在特定位置添加一个值。
参数:
- 萤幕项目(阵列)
- 条件:数字(预设值:0)
- 屏幕专案
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"array_insertAt\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"index\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value><value name=\"value\"><shadow type=\"text\"><field name=\"TEXT\">hello</field></shadow></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
在特定位置删除值
列出删除值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>index</variable></variables><block type=\"array_removeat_statement\" disabled=\"true\" x=\"0\" y=\"0\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value><value name=\"index\"><shadow type=\"math_number\" disabled=\"true\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
这个块用于删除特定位置的值。
参数:
- 萤幕项目(阵列)
- 条件:数字(预设值:0)
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"array_removeat_statement\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"index\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
操作
查找值的位置
清单查找索引
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>index</variable></variables><block type=\"array_indexof\" disabled=\"true\" x=\"-22\" y=\"607\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于查找值的位置。
参数:
- 萤幕项目(阵列)
- 条件:字串/数位
输出: 数
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>find</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">find</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"array_indexof\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"value\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"basic_consoleLogNum\"><value name=\"num\"><block type=\"variables_get\"><field name=\"VAR\">find</field></block></value></block></next></block></next></block></statement></block></xml>"}
输出:
反转阵列
反向清单
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>find</variable></variables><block type=\"array_reverse\" disabled=\"true\" x=\"23\" y=\"697\"><value name=\"list\"><block type=\"variables_get\" disabled=\"true\"><field name=\"VAR\">list</field></block></value></block></xml>"}
此块用于反转数位列中的值。
参数: 萤幕项目(阵列)
输出: N/A
范例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>list</variable><variable>index</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">list</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_create_with\"><mutation items=\"3\" horizontalafter=\"3\"/><value name=\"ADD0\"><shadow type=\"text\"><field name=\"TEXT\">a</field></shadow></value><value name=\"ADD1\"><shadow type=\"text\"><field name=\"TEXT\">b</field></shadow></value><value name=\"ADD2\"><shadow type=\"text\"><field name=\"TEXT\">c</field></shadow></value></block></value><next><block type=\"array_reverse\"><value name=\"list\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><next><block type=\"pxt_controls_for\"><value name=\"VAR\"><shadow type=\"variables_get_reporter\"><field name=\"VAR\">index</field></shadow></value><value name=\"TO\"><shadow type=\"math_whole_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">MINUS</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"lists_length\"><value name=\"VALUE\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><statement name=\"DO\"><block type=\"basic_consoleLogText\"><value name=\"text\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">list</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">index</field></block></value></block></value></block></statement></block></next></block></next></block></statement></block></xml>"}
输出:
目录