--- /dev/null
+'use strict';
+
+var toInteger = require('../../../number/to-integer')
+ , toPosInt = require('../../../number/to-pos-integer')
+ , isPlainArray = require('../../is-plain-array')
+
+ , isArray = Array.isArray, slice = Array.prototype.slice
+ , hasOwnProperty = Object.prototype.hasOwnProperty, max = Math.max;
+
+module.exports = function (start, end) {
+ var length, result, i;
+ if (!this || !isArray(this) || isPlainArray(this)) {
+ return slice.apply(this, arguments);
+ }
+ length = toPosInt(this.length);
+ start = toInteger(start);
+ if (start < 0) start = max(length + start, 0);
+ else if (start > length) start = length;
+ if (end === undefined) {
+ end = length;
+ } else {
+ end = toInteger(end);
+ if (end < 0) end = max(length + end, 0);
+ else if (end > length) end = length;
+ }
+ if (start > end) start = end;
+ result = new this.constructor(end - start);
+ i = 0;
+ while (start !== end) {
+ if (hasOwnProperty.call(this, start)) result[i] = this[start];
+ ++i;
+ ++start;
+ }
+ return result;
+};