2d数组使用下划线的_.map关联数组 [英] 2d array to associative array using underscore's _.map

问题描述

我正在尝试映射2d数组：

  var fkOptionList2d = [[3，'Orange']，[5 ，'Banana']，[6，'Coconut']] 
  

到一个关联数组： p>

  var fkOptionList1d = [{id：1，label：'Orange'}，{id：2，label：'Banana'}， {id：3，label：'Coconut'}] 
  

但我是新来的underscore.js并没有得到它。应该是这样的：

  fkTableArr1d = _.object（_。map（fkTableArr2d，function（item，id）{
 return [{id：+ id，label：+ item}] 
}））; 
  

？

解决方案<根据我的理解，您需要使用

  return [{
id：id， label：item 
}] 
  

而不是

  return [{id：+ id，label：+ item}] 
  

您从函数返回无效的JSON

此外，您不需要 _。对象方法

  fkTableArr1d = _.map（fkTableArr2d，function（item，id）{
 return [{
id：id，label：item 
}]; 
}）; 
  

演示

I'm trying to map 2d array:

var fkOptionList2d = [[3, 'Orange'],[5, 'Banana'],[6, 'Coconut']]

to an associative array:

var fkOptionList1d = [{id: 1, label: 'Orange'},{id: 2, label: 'Banana'},{id: 3, label: 'Coconut'}]

but I'm new to underscore.js and don't quite get it yet. Should it be something like:

fkTableArr1d = _.object(_.map(fkTableArr2d, function(item, id) {
   return [{"id: " + id,"label: " + item}]
}));

?

解决方案

As per my understanding you need to use

return [{
    "id " : id, "label " : item
}]

instead of

return [{"id: " + id,"label: " + item}]

You are returning invalid JSON from the function

Additionally you don't need _.object method

fkTableArr1d = _.map(fkTableArr2d, function(item, id) {
      return [{
        "id " : id, "label " : item
        }];
    });

DEMO

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