29 lines
899 B
JavaScript
29 lines
899 B
JavaScript
var isFunction = require('./isFunction.js');
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var _optimizeCb = require('./_optimizeCb.js');
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var _flatten = require('./_flatten.js');
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var _keyInObj = require('./_keyInObj.js');
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var allKeys = require('./allKeys.js');
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var restArguments = require('./restArguments.js');
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// Return a copy of the object only containing the allowed properties.
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var pick = restArguments(function(obj, keys) {
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var result = {}, iteratee = keys[0];
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if (obj == null) return result;
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if (isFunction(iteratee)) {
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if (keys.length > 1) iteratee = _optimizeCb(iteratee, keys[1]);
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keys = allKeys(obj);
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} else {
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iteratee = _keyInObj;
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keys = _flatten(keys, false, false);
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obj = Object(obj);
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}
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for (var i = 0, length = keys.length; i < length; i++) {
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var key = keys[i];
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var value = obj[key];
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if (iteratee(value, key, obj)) result[key] = value;
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}
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return result;
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});
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module.exports = pick;
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