19 lines
519 B
JavaScript
19 lines
519 B
JavaScript
|
var isArrLike = require('./isArrLike');
|
||
|
|
var clone = require('./clone');
|
||
|
|
var values = require('./values');
|
||
|
|
var random = require('./random');
|
||
|
|
var swap = require('./swap');
|
||
|
|
exports = function(obj, n) {
|
||
|
|
var sample = isArrLike(obj) ? clone(obj) : values(obj);
|
||
|
|
var len = sample.length;
|
||
|
|
n = Math.max(Math.min(n, len), 0);
|
||
|
|
var last = len - 1;
|
||
|
|
for (var i = 0; i < n; i++) {
|
||
|
|
var rand = random(i, last);
|
||
|
|
swap(sample, i, rand);
|
||
|
|
}
|
||
|
|
return sample.slice(0, n);
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = exports;
|