mirror of
https://github.com/Doodle3D/Doodle3D-API
synced 2024-12-23 22:13:48 +01:00
31 lines
803 B
JavaScript
31 lines
803 B
JavaScript
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/* */
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'use strict';
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var $ = require("./$"),
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$def = require("./$.def"),
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toIndex = $.toIndex;
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$def($def.P, 'Array', {copyWithin: function copyWithin(target, start) {
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var O = Object($.assertDefined(this)),
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len = $.toLength(O.length),
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to = toIndex(target, len),
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from = toIndex(start, len),
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end = arguments[2],
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fin = end === undefined ? len : toIndex(end, len),
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count = Math.min(fin - from, len - to),
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inc = 1;
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if (from < to && to < from + count) {
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inc = -1;
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from = from + count - 1;
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to = to + count - 1;
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}
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while (count-- > 0) {
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if (from in O)
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O[to] = O[from];
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else
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delete O[to];
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to += inc;
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from += inc;
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}
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return O;
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}});
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require("./$.unscope")('copyWithin');
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