我在JavaScript中有一个构造函数,其中包含2个属性 Key 和 Values数组:
I have a constructor in JavaScript which contains 2 properties Key and Values array:
function Test(key, values) { this.Key = key; this.Values = values.map(values); }然后我创建了一个 Test对象的数组:
var testObjectArray = []; testObjectArray.push(new Test(1, ['a1','b1']), new Test(2, ['a1','b2']));现在我想将 testObjectArray 映射到单个键值对数组,其类似于:
Now I want to map the testObjectArray to single key-value pair array which will be similar to :
[ { "Key" : "1", "Value" : "a1" }, { "Key" : "1", "Value" : "b1" }, { "Key" : "2", "Value" : "a2" }, { "Key" : "2", "Value" : "b2" }, ]如何使用数组的 map 函数实现这一目标?
How can I achieve this using array's map function?
推荐答案我想您是对map()的误解。这是一个非常简单的示例:
I guess you are misunderstanding map(). Here is a very simple example:
a = [1, 2, 3] b = a.map(function (i) { return i + 1 }) // => [2, 3, 4]以下是地图的MDN文档: developer.mozilla/zh-CN/docs/Web / JavaScript / Reference / Global_Objects / Array / map 。因此,您应该重新考虑map的用法。顺便说一句-您的示例不起作用,因为值不是函数。
Here is the MDN documentation for map: developer.mozilla/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map. So you should rethink the usage of map in your case. By the way - your example is not working, because values is not a function.
这是一个可能的解决方案:
Here is a possible solution:
res = []; a = [['a1','b1'],['a1','b2']]; for (var i = 0; i < a.length; ++i) { for(var j = 0; j < a[i].length; ++j) { res.push({"Key": i + 1 , "Value" : a[i][j]}); } }更多推荐
如何将一个JavaScript数组映射到另一个JavaScript数组
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