在JavaScript与.MAP（）

Question

使用谷歌表脚本编辑器，我想替换每个这张表对数字值替换阵列值，如下所示：

"I like it" = 2 
"I don't like it" = -1 
"Haven't seen it" = 0 

+---------+-----------------+-----------------+-----------------+ 
|   |  User A  |  User B  |  User C  | 
+---------+-----------------+-----------------+-----------------+ 
| Movie 1 | I like it | I don't like it | Haven't seen it | 
+---------+-----------------+-----------------+-----------------+ 
| Movie 2 | Haven't seen it | Haven't seen it | I don't like it | 
+---------+-----------------+-----------------+-----------------+ 
| Movie 3 | Haven't seen it | I don't like it | I Like it | 
+---------+-----------------+-----------------+-----------------+ 

我不知道是否我应该使用array.map（）或array.forEach（）但在这两种情况下，我无法弄清楚如何将每个单元格与字符串进行比较以创建条件。

如果可能的话，我宁愿避免使用循环，因为我相信它必须能够与array.map（）这似乎更清洁。

Answer 1

下面是使用地图（）另一种方式： （改变工作表名称和范围，以适应）。

function stringToNumbers() { 

var strings, numbers, range, data, ind; 

strings = ['I like it', 'I don\'t like it', 'Haven\'t seen it']; 
numbers = [2, -1, 0]; 
range = SpreadsheetApp.getActive() 
    .getSheetByName('Sheet6') 
    .getRange('B2:D6') 
data = range.getValues() 
    .map(function (r) { 
     return r.map(function (el) { 
      ind = strings.indexOf(el); 
      return ind > -1 ? numbers[ind] : null; 
     }) 
    }) 

Logger.log(data) 
//range.setValues(data) //if you want to write the numbers back to the sheet, uncomment this line. 
} 

Answer 2

要翻译数组中的所有数据，您可能需要使用Array.prototype.map()。然而，由于你的数据结构我假设是一个嵌套的数组，你可能需要有forEach组合和map：

var arr = [['I like it', 'I don't like it', 'Haven't seen it'],[//etc]]; 

function stringToNumber(str) { 
    var num; 
    if (str === "I like it") { 
    num = 2; 
    } else if (str === "I don't like it") { 
    num = -1; 
    } else if (str === "Haven't seen it") { 
    num = 0; 
    } 
    return num; 
} 

function mapRow(row) { 
    return row.map(stringToNumber); 
} 

arr.forEach(mapRow)