Replace an array|object's content with the other one's while keeping the reference
npm install replace-withnpm i replace-with -S
/**
* Replace an array|object's content with the other one's while keeping the reference
* @param {Array|Object} orig
* @param {Array|Object} other
* @return {Array|Object} orig
*/
var keys = Object.keys;
module.exports = function replaceWith(orig, other) {
if (Array.isArray(orig)) {
// for Array
orig.splice.apply(orig, [0, orig.length].concat(other));
} else {
// for Object
keys(orig).forEach(function (k) { delete orig[k] });
keys(other).forEach(function (k) { orig[k] = other[k] });
}
return orig;
};
`
$3
> Let's take a look at the test examples
`
test('replace array', t => {
const orig = [1, 2, 3]
const ref = orig
replaceWith(orig, [4, 5, 6])
t.is(ref, orig) // pass!
t.deepEqual(orig, [4, 5, 6]) // pass!
})
test('replace object', t => {
let orig = { a: 1, b: 2, c: 3 }
const ref = orig
orig = replaceWith(orig, { d: 4, e: 5, f: 6 })
t.is(ref, orig) // pass!
t.deepEqual(orig, { d: 4, e: 5, f: 6 }) // pass!
})
`
$3
npm test`