blob: 5061c66645283c0c07bec1358fae5aa67270d990 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
/**
* Creates a keyed JS object from an array, given a function to produce the keys
* and a function to produce the values from each item in the array.
*
* const phoneBook = [
* { name: 'Jon', num: '555-1234' },
* { name: 'Jenny', num: '867-5309' }
* ]
*
* // { Jon: '555-1234', Jenny: '867-5309' }
* const phonesByName = keyValMap(
* phoneBook,
* entry => entry.name,
* entry => entry.num
* )
*
*/
export default function keyValMap(list, keyFn, valFn) {
return list.reduce(function (map, item) {
map[keyFn(item)] = valFn(item);
return map;
}, Object.create(null));
}
|
