27 lines
855 B
JavaScript
27 lines
855 B
JavaScript
import restArguments from './restArguments.js';
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import isFunction from './isFunction.js';
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import optimizeCb from './_optimizeCb.js';
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import allKeys from './allKeys.js';
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import keyInObj from './_keyInObj.js';
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import flatten from './_flatten.js';
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// Return a copy of the object only containing the allowed properties.
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export default 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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