4.17.11
3.10.1
2.4.2
1.3.1
_.keyBy(collection, [iteratee=_.identity])
Creates an object composed of keys generated from the results of running
each element of collection
thru iteratee
. The corresponding value of
each key is the last element responsible for generating the key. The
iteratee is invoked with one argument: (value).
Since
4.0.0
Arguments
argument
collection
[iteratee=_.identity]
type
(Array|Object)
Function
description
The collection to iterate over.
The iteratee to transform keys.
Returns
(array)
Example
var array = [
{ dir: "left", code: 97 },
{ dir: "right", code: 100 },
];
_.keyBy(array, function (o) {
return String.fromCharCode(o.code);
});
// => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
_.keyBy(array, "dir");
// => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
var array = [
{ dir: "left", code: 97 },
{ dir: "right", code: 100 },
];
_.keyBy(array, function (o) {
return String.fromCharCode(o.code);
});
// => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
_.keyBy(array, "dir");
// => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }