Sha256: f4215c66904038b167af7e17c61af1e7c4ef60fa395d4fcd8cd99fafc1547244
Contents?: true
Size: 904 Bytes
Versions: 26
Compression:
Stored size: 904 Bytes
Contents
'use strict';
Object.defineProperty(exports, '__esModule', {
value: true,
});
exports.keyMap = keyMap;
/**
* Creates a keyed JS object from an array, given a function to produce the keys
* for each value in the array.
*
* This provides a convenient lookup for the array items if the key function
* produces unique results.
* ```ts
* const phoneBook = [
* { name: 'Jon', num: '555-1234' },
* { name: 'Jenny', num: '867-5309' }
* ]
*
* const entriesByName = keyMap(
* phoneBook,
* entry => entry.name
* )
*
* // {
* // Jon: { name: 'Jon', num: '555-1234' },
* // Jenny: { name: 'Jenny', num: '867-5309' }
* // }
*
* const jennyEntry = entriesByName['Jenny']
*
* // { name: 'Jenny', num: '857-6309' }
* ```
*/
function keyMap(list, keyFn) {
const result = Object.create(null);
for (const item of list) {
result[keyFn(item)] = item;
}
return result;
}
Version data entries
26 entries across 26 versions & 1 rubygems