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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