Simple way to flatten this array?
I have this array:
[{name: 'email',value: 'a@b.com'}, {name: 'phone',value: '123-123-1234'}]
I need to turn it into this:
{email: 'a@b.com', phone: '123-123-1234'}
How can I do this? I figure I can do a million iterators to get the job done, but I think maybe there's a cleaner way to do this.
I'm using Underscore and jQuery if that helps.
There are several ways to do that task.
One is using Array.prototype.map :
var arr = [{name: 'email',value: 'a@b.com'}, {name: 'phone',value: '123-123-1234'}];
var obj = {};
arr.map(function (item) {
var key = item.name;
var value = item.value;
if (!obj[key]) {
obj[key] = value;
}
});
console.log(obj);
As noted in the comments and other answer, .reduce() , .forEach() or a simple for-loop can get the job done as well.
Array.prototype.reduce对于这种类型的操作非常简单：
var items = [{name: 'email',value: 'a@b.com'}, {name: 'phone',value: '123-123-1234'}]
var data = items.reduce(function (result, item) {
result[item.name] = item.value;
return result;
}, {});
UnderscoreJS is just awesome, and you may use _.map . See the code below:
var existingObject = [{name: 'email',value: 'a@b.com'}, {name: 'phone',value: '123-123-1234'}];
var selectedObject = _.map(existingObject, function(obj) {
var retObj = { };
retObj[obj["name"]] = obj["value"];
return retObj;
});
console.log(selectedObject);
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