| var isLength = require('../internal/isLength'), |
| isObjectLike = require('../internal/isObjectLike'); |
| |
| /** `Object#toString` result references. */ |
| var argsTag = '[object Arguments]', |
| arrayTag = '[object Array]', |
| boolTag = '[object Boolean]', |
| dateTag = '[object Date]', |
| errorTag = '[object Error]', |
| funcTag = '[object Function]', |
| mapTag = '[object Map]', |
| numberTag = '[object Number]', |
| objectTag = '[object Object]', |
| regexpTag = '[object RegExp]', |
| setTag = '[object Set]', |
| stringTag = '[object String]', |
| weakMapTag = '[object WeakMap]'; |
| |
| var arrayBufferTag = '[object ArrayBuffer]', |
| float32Tag = '[object Float32Array]', |
| float64Tag = '[object Float64Array]', |
| int8Tag = '[object Int8Array]', |
| int16Tag = '[object Int16Array]', |
| int32Tag = '[object Int32Array]', |
| uint8Tag = '[object Uint8Array]', |
| uint8ClampedTag = '[object Uint8ClampedArray]', |
| uint16Tag = '[object Uint16Array]', |
| uint32Tag = '[object Uint32Array]'; |
| |
| /** Used to identify `toStringTag` values of typed arrays. */ |
| var typedArrayTags = {}; |
| typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = |
| typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = |
| typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = |
| typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = |
| typedArrayTags[uint32Tag] = true; |
| typedArrayTags[argsTag] = typedArrayTags[arrayTag] = |
| typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = |
| typedArrayTags[dateTag] = typedArrayTags[errorTag] = |
| typedArrayTags[funcTag] = typedArrayTags[mapTag] = |
| typedArrayTags[numberTag] = typedArrayTags[objectTag] = |
| typedArrayTags[regexpTag] = typedArrayTags[setTag] = |
| typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false; |
| |
| /** Used for native method references. */ |
| var objectProto = Object.prototype; |
| |
| /** |
| * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring) |
| * of values. |
| */ |
| var objToString = objectProto.toString; |
| |
| /** |
| * Checks if `value` is classified as a typed array. |
| * |
| * @static |
| * @memberOf _ |
| * @category Lang |
| * @param {*} value The value to check. |
| * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. |
| * @example |
| * |
| * _.isTypedArray(new Uint8Array); |
| * // => true |
| * |
| * _.isTypedArray([]); |
| * // => false |
| */ |
| function isTypedArray(value) { |
| return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[objToString.call(value)]; |
| } |
| |
| module.exports = isTypedArray; |