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49 lines
1.7 KiB
49 lines
1.7 KiB
var baseTimes = require('./_baseTimes'), |
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isArguments = require('./isArguments'), |
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isArray = require('./isArray'), |
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isBuffer = require('./isBuffer'), |
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isIndex = require('./_isIndex'), |
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isTypedArray = require('./isTypedArray'); |
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/** Used for built-in 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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* Creates an array of the enumerable property names of the array-like `value`. |
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* |
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* @private |
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* @param {*} value The value to query. |
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* @param {boolean} inherited Specify returning inherited property names. |
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* @returns {Array} Returns the array of property names. |
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*/ |
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function arrayLikeKeys(value, inherited) { |
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var isArr = isArray(value), |
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isArg = !isArr && isArguments(value), |
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isBuff = !isArr && !isArg && isBuffer(value), |
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isType = !isArr && !isArg && !isBuff && isTypedArray(value), |
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skipIndexes = isArr || isArg || isBuff || isType, |
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result = skipIndexes ? baseTimes(value.length, String) : [], |
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length = result.length; |
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for (var key in value) { |
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if ((inherited || hasOwnProperty.call(value, key)) && |
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!(skipIndexes && ( |
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// Safari 9 has enumerable `arguments.length` in strict mode. |
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key == 'length' || |
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// Node.js 0.10 has enumerable non-index properties on buffers. |
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(isBuff && (key == 'offset' || key == 'parent')) || |
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// PhantomJS 2 has enumerable non-index properties on typed arrays. |
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(isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) || |
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// Skip index properties. |
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isIndex(key, length) |
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))) { |
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result.push(key); |
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} |
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} |
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return result; |
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} |
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module.exports = arrayLikeKeys;
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