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39 lines
1.1 KiB
39 lines
1.1 KiB
var castPath = require('./_castPath'), |
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isArguments = require('./isArguments'), |
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isArray = require('./isArray'), |
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isIndex = require('./_isIndex'), |
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isLength = require('./isLength'), |
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toKey = require('./_toKey'); |
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/** |
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* Checks if `path` exists on `object`. |
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* |
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* @private |
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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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* @param {Function} hasFunc The function to check properties. |
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* @returns {boolean} Returns `true` if `path` exists, else `false`. |
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*/ |
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function hasPath(object, path, hasFunc) { |
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path = castPath(path, object); |
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var index = -1, |
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length = path.length, |
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result = false; |
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while (++index < length) { |
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var key = toKey(path[index]); |
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if (!(result = object != null && hasFunc(object, key))) { |
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break; |
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} |
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object = object[key]; |
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} |
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if (result || ++index != length) { |
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return result; |
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} |
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length = object == null ? 0 : object.length; |
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return !!length && isLength(length) && isIndex(key, length) && |
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(isArray(object) || isArguments(object)); |
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} |
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module.exports = hasPath;
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