Javascript - 将数组数组转换为具有预填充值的对象数组 [英] Javascript - convert array of arrays into array of objects with prefilled values
问题描述
我有以下数组:
<预><代码>[[val1, val2][val1, val2][val1, val2][valN, valN]]N
代表这些数组不受限制的事实,即我永远不知道我存储了多少.我试图完成的是将该数组转换为带有键 lat
和 lng
的对象数组,我希望最终结果如下,以便我可以将其用于进一步的需求:
我找到了一个将这些内部数组转换为对象的函数,它看起来像这样:
objectify(array) {返回 array.reduce(function(result, currentArray) {结果[currentArray[0]] = currentArray[1];返回结果;}, {});}
它可以工作,但输出看起来像这样:
<预><代码>[{val1: val1, val2: val2}{val1: val1, val2: val2}{valN: valN, valN: valN}]这不是我要找的,因为我真的需要这些 lat
和 lng
作为对象的键.我该如何解决此类问题?
您可以简单地使用 Array.prototype.map
通过应用投影函数将一个数组投影到另一个数组中:
var arrs = [[1, 2],[3, 4],[5, 6],[7, 8]];var objs = arrs.map(function(x) {返回 {纬度:x[0],lng: x[1]};});console.log(objs);
I have following array:
[
[val1, val2]
[val1, val2]
[val1, val2]
[valN, valN]
]
N
represents the fact that these arrays are not limited, i.e I never know how much of them do I store. What I try to accomplish is converting that array to array of objects with keys lat
and lng
and I expect so have final result as following so I can use it for further needs:
[
{
lat: val1,
lng: val2
},
{
lat: val1,
lng: val2
},
{
lat: valN,
lng: valN
}
]
I found a function to convert these inner arrays to objects and it looks like this:
objectify(array) {
return array.reduce(function(result, currentArray) {
result[currentArray[0]] = currentArray[1];
return result;
}, {});
}
It works but output looks like this:
[
{val1: val1, val2: val2}
{val1: val1, val2: val2}
{valN: valN, valN: valN}
]
and that's not what I'm looking for, because I really need these lat
and lng
to be keys of an object. How can I solve such issue?
You can simply use Array.prototype.map
to project an array into another one by applying a projection function:
var arrs = [
[1, 2],
[3, 4],
[5, 6],
[7, 8]
];
var objs = arrs.map(function(x) {
return {
lat: x[0],
lng: x[1]
};
});
console.log(objs);
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