You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
132 lines
4.0 KiB
132 lines
4.0 KiB
/** |
|
* lodash 3.0.9 (Custom Build) <https://lodash.com/> |
|
* Build: `lodash modern modularize exports="npm" -o ./` |
|
* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/> |
|
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE> |
|
* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors |
|
* Available under MIT license <https://lodash.com/license> |
|
*/ |
|
|
|
/** Used to detect unsigned integer values. */ |
|
var reIsUint = /^\d+$/; |
|
|
|
/** |
|
* Used as the [maximum length](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer) |
|
* of an array-like value. |
|
*/ |
|
var MAX_SAFE_INTEGER = 9007199254740991; |
|
|
|
/** |
|
* The base implementation of `_.property` without support for deep paths. |
|
* |
|
* @private |
|
* @param {string} key The key of the property to get. |
|
* @returns {Function} Returns the new function. |
|
*/ |
|
function baseProperty(key) { |
|
return function(object) { |
|
return object == null ? undefined : object[key]; |
|
}; |
|
} |
|
|
|
/** |
|
* Gets the "length" property value of `object`. |
|
* |
|
* **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) |
|
* that affects Safari on at least iOS 8.1-8.3 ARM64. |
|
* |
|
* @private |
|
* @param {Object} object The object to query. |
|
* @returns {*} Returns the "length" value. |
|
*/ |
|
var getLength = baseProperty('length'); |
|
|
|
/** |
|
* Checks if `value` is array-like. |
|
* |
|
* @private |
|
* @param {*} value The value to check. |
|
* @returns {boolean} Returns `true` if `value` is array-like, else `false`. |
|
*/ |
|
function isArrayLike(value) { |
|
return value != null && isLength(getLength(value)); |
|
} |
|
|
|
/** |
|
* Checks if `value` is a valid array-like index. |
|
* |
|
* @private |
|
* @param {*} value The value to check. |
|
* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index. |
|
* @returns {boolean} Returns `true` if `value` is a valid index, else `false`. |
|
*/ |
|
function isIndex(value, length) { |
|
value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1; |
|
length = length == null ? MAX_SAFE_INTEGER : length; |
|
return value > -1 && value % 1 == 0 && value < length; |
|
} |
|
|
|
/** |
|
* Checks if the provided arguments are from an iteratee call. |
|
* |
|
* @private |
|
* @param {*} value The potential iteratee value argument. |
|
* @param {*} index The potential iteratee index or key argument. |
|
* @param {*} object The potential iteratee object argument. |
|
* @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`. |
|
*/ |
|
function isIterateeCall(value, index, object) { |
|
if (!isObject(object)) { |
|
return false; |
|
} |
|
var type = typeof index; |
|
if (type == 'number' |
|
? (isArrayLike(object) && isIndex(index, object.length)) |
|
: (type == 'string' && index in object)) { |
|
var other = object[index]; |
|
return value === value ? (value === other) : (other !== other); |
|
} |
|
return false; |
|
} |
|
|
|
/** |
|
* Checks if `value` is a valid array-like length. |
|
* |
|
* **Note:** This function is based on [`ToLength`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength). |
|
* |
|
* @private |
|
* @param {*} value The value to check. |
|
* @returns {boolean} Returns `true` if `value` is a valid length, else `false`. |
|
*/ |
|
function isLength(value) { |
|
return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER; |
|
} |
|
|
|
/** |
|
* Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`. |
|
* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) |
|
* |
|
* @static |
|
* @memberOf _ |
|
* @category Lang |
|
* @param {*} value The value to check. |
|
* @returns {boolean} Returns `true` if `value` is an object, else `false`. |
|
* @example |
|
* |
|
* _.isObject({}); |
|
* // => true |
|
* |
|
* _.isObject([1, 2, 3]); |
|
* // => true |
|
* |
|
* _.isObject(1); |
|
* // => false |
|
*/ |
|
function isObject(value) { |
|
// Avoid a V8 JIT bug in Chrome 19-20. |
|
// See https://code.google.com/p/v8/issues/detail?id=2291 for more details. |
|
var type = typeof value; |
|
return !!value && (type == 'object' || type == 'function'); |
|
} |
|
|
|
module.exports = isIterateeCall;
|
|
|