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43 lines
1.5 KiB
JavaScript
43 lines
1.5 KiB
JavaScript
9 years ago
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var baseFlatten = require('../internal/baseFlatten'),
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bindCallback = require('../internal/bindCallback'),
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pickByArray = require('../internal/pickByArray'),
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pickByCallback = require('../internal/pickByCallback'),
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restParam = require('../function/restParam');
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/**
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* Creates an object composed of the picked `object` properties. Property
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* names may be specified as individual arguments or as arrays of property
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* names. If `predicate` is provided it's invoked for each property of `object`
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* picking the properties `predicate` returns truthy for. The predicate is
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* bound to `thisArg` and invoked with three arguments: (value, key, object).
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*
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* @static
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* @memberOf _
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* @category Object
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* @param {Object} object The source object.
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* @param {Function|...(string|string[])} [predicate] The function invoked per
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* iteration or property names to pick, specified as individual property
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* names or arrays of property names.
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* @param {*} [thisArg] The `this` binding of `predicate`.
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* @returns {Object} Returns the new object.
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* @example
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*
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* var object = { 'user': 'fred', 'age': 40 };
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*
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* _.pick(object, 'user');
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* // => { 'user': 'fred' }
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*
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* _.pick(object, _.isString);
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* // => { 'user': 'fred' }
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*/
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var pick = restParam(function(object, props) {
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if (object == null) {
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return {};
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}
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return typeof props[0] == 'function'
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? pickByCallback(object, bindCallback(props[0], props[1], 3))
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: pickByArray(object, baseFlatten(props));
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});
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module.exports = pick;
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