I have an array of objects that looks like so:
var A = [{key:"key1",val:1},{key:"key2",val:2},...,{key:"keyn",val:n}]
And I want to transform A to an object:
{
key1: 1,
key2: 2,
...
keyn: n
}
This usecase has never come up, but I was thinking of doing mapKeys and then mapValues and I feel there's a simpler answer. Thanks!
You don't really need lodash to achieve that. Just do this with array.reduce(). See code sample below:
function transformArray(arraySrc){
return arraySrc.reduce(function(prev, curr){
prev[curr.key] = curr.val;
return prev;
}, {});
}
transformArray([{key:"key1",val:1},{key:"key2",val:2},{key:"key3",val:3}]);
Array.prototype.reduce but @minitech answered using lodash so i'm accepting his/hers
return arraySrc.reduce(...);. ;-)
Array.prototype.reduce with _.reduce if you need an Underscore/lodash approach.I'd do this:
var result = _(A).keyBy('key').mapValues('val').value();
Clear and simple.
The best way is to use _.extend.
let list = [{"foo":"bar"},{"baz":"faz"},{"label":"Hello, World!"}];
let singleObject = _.extend.apply({}, list);
Output:
{foo: "bar", baz: "faz", label: "Hello, World!"}
Updating @ry answer to a newer version of lodash:
var result = _.zipObject(
_.map(A, 'key'),
_.map(A, 'val')
);
There may be a built-in way that I can’t find, but:
var result = _.zipObject(
_.pluck(A, 'key'),
_.pluck(A, 'val')
);
