| 1 | 'use strict';
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| 2 | var uncurryThis = require('../internals/function-uncurry-this');
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| 3 | var isArray = require('../internals/is-array');
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| 4 | var isCallable = require('../internals/is-callable');
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| 5 | var classof = require('../internals/classof-raw');
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| 6 | var toString = require('../internals/to-string');
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| 7 |
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| 8 | var push = uncurryThis([].push);
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| 9 |
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| 10 | module.exports = function (replacer) {
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| 11 | if (isCallable(replacer)) return replacer;
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| 12 | if (!isArray(replacer)) return;
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| 13 | var rawLength = replacer.length;
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| 14 | var keys = [];
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| 15 | for (var i = 0; i < rawLength; i++) {
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| 16 | var element = replacer[i];
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| 17 | if (typeof element == 'string') push(keys, element);
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| 18 | else if (typeof element == 'number' || classof(element) === 'Number' || classof(element) === 'String') push(keys, toString(element));
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| 19 | }
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| 20 | var keysLength = keys.length;
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| 21 | var root = true;
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| 22 | return function (key, value) {
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| 23 | if (root) {
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| 24 | root = false;
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| 25 | return value;
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| 26 | }
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| 27 | if (isArray(this)) return value;
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| 28 | for (var j = 0; j < keysLength; j++) if (keys[j] === key) return value;
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| 29 | };
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| 30 | };
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