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node_modules/es5-ext/function/_define-length.js
54 строки
1 KB
EvgeniyBudaev
Initial commit
17 фев 2020, 09:02
17 фев 2020, 09:02
bb6f06f
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О чём код?
"use strict"; var toPosInt = require("../number/to-pos-integer"); var test = function (arg1, arg2) { return arg2; }; var desc, defineProperty, generate, mixin; try { Object.defineProperty(test, "length", { configurable: true, writable: false, enumerable: false, value: 1 }); } catch (ignore) {} if (test.length === 1) { // ES6 desc = { configurable: true, writable: false, enumerable: false }; defineProperty = Object.defineProperty; module.exports = function (fn, length) { length = toPosInt(length); if (fn.length === length) return fn; desc.value = length; return defineProperty(fn, "length", desc); }; } else { mixin = require("../object/mixin"); generate = (function () { var cache = []; return function (length) { var args, i = 0; if (cache[length]) return cache[length]; args = []; while (length--) args.push("a" + (++i).toString(36)); // eslint-disable-next-line no-new-func return new Function( "fn", "return function (" + args.join(", ") + ") { return fn.apply(this, arguments); };" ); }; })(); module.exports = function (src, length) { var target; length = toPosInt(length); if (src.length === length) return src; target = generate(length)(src); try { mixin(target, src); } catch (ignore) {} return target; }; }