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58 lines
1.6 KiB
JavaScript
58 lines
1.6 KiB
JavaScript
var baseGet = require('../internal/baseGet'),
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baseSlice = require('../internal/baseSlice'),
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isArguments = require('../lang/isArguments'),
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isArray = require('../lang/isArray'),
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isIndex = require('../internal/isIndex'),
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isKey = require('../internal/isKey'),
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isLength = require('../internal/isLength'),
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last = require('../array/last'),
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toPath = require('../internal/toPath');
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/** Used for native method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* Checks if `path` is a direct property.
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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 object to query.
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* @param {Array|string} path The path to check.
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* @returns {boolean} Returns `true` if `path` is a direct property, else `false`.
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* @example
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*
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* var object = { 'a': { 'b': { 'c': 3 } } };
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*
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* _.has(object, 'a');
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* // => true
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*
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* _.has(object, 'a.b.c');
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* // => true
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*
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* _.has(object, ['a', 'b', 'c']);
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* // => true
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*/
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function has(object, path) {
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if (object == null) {
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return false;
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}
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var result = hasOwnProperty.call(object, path);
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if (!result && !isKey(path)) {
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path = toPath(path);
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object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
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if (object == null) {
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return false;
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}
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path = last(path);
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result = hasOwnProperty.call(object, path);
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}
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return result || (isLength(object.length) && isIndex(path, object.length) &&
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(isArray(object) || isArguments(object)));
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}
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module.exports = has;
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