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156 lines
4.1 KiB
156 lines
4.1 KiB
1 year ago
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/**
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* Lodash (Custom Build) <https://lodash.com/>
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* Build: `lodash modularize exports="npm" -o ./`
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* Copyright JS Foundation and other contributors <https://js.foundation/>
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* Released under MIT license <https://lodash.com/license>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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*/
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/** `Object#toString` result references. */
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var asyncTag = '[object AsyncFunction]',
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funcTag = '[object Function]',
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genTag = '[object GeneratorFunction]',
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nullTag = '[object Null]',
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proxyTag = '[object Proxy]',
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undefinedTag = '[object Undefined]';
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/** Detect free variable `global` from Node.js. */
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var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
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/** Detect free variable `self`. */
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var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
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/** Used as a reference to the global object. */
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var root = freeGlobal || freeSelf || Function('return this')();
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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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* Used to resolve the
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* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
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* of values.
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*/
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var nativeObjectToString = objectProto.toString;
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/** Built-in value references. */
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var Symbol = root.Symbol,
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symToStringTag = Symbol ? Symbol.toStringTag : undefined;
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/**
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* The base implementation of `getTag` without fallbacks for buggy environments.
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*
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* @private
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* @param {*} value The value to query.
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* @returns {string} Returns the `toStringTag`.
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*/
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function baseGetTag(value) {
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if (value == null) {
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return value === undefined ? undefinedTag : nullTag;
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}
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return (symToStringTag && symToStringTag in Object(value))
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? getRawTag(value)
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: objectToString(value);
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}
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/**
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* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
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*
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* @private
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* @param {*} value The value to query.
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* @returns {string} Returns the raw `toStringTag`.
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*/
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function getRawTag(value) {
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var isOwn = hasOwnProperty.call(value, symToStringTag),
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tag = value[symToStringTag];
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try {
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value[symToStringTag] = undefined;
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var unmasked = true;
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} catch (e) {}
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var result = nativeObjectToString.call(value);
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if (unmasked) {
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if (isOwn) {
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value[symToStringTag] = tag;
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} else {
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delete value[symToStringTag];
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}
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}
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return result;
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}
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/**
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* Converts `value` to a string using `Object.prototype.toString`.
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*
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* @private
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* @param {*} value The value to convert.
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* @returns {string} Returns the converted string.
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*/
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function objectToString(value) {
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return nativeObjectToString.call(value);
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}
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/**
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* Checks if `value` is classified as a `Function` object.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a function, else `false`.
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* @example
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*
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* _.isFunction(_);
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* // => true
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*
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* _.isFunction(/abc/);
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* // => false
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*/
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function isFunction(value) {
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if (!isObject(value)) {
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return false;
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}
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// The use of `Object#toString` avoids issues with the `typeof` operator
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// in Safari 9 which returns 'object' for typed arrays and other constructors.
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var tag = baseGetTag(value);
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return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
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}
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/**
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* Checks if `value` is the
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* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
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* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an object, else `false`.
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* @example
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*
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* _.isObject({});
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* // => true
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*
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* _.isObject([1, 2, 3]);
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* // => true
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*
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* _.isObject(_.noop);
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* // => true
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*
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* _.isObject(null);
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* // => false
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*/
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function isObject(value) {
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var type = typeof value;
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return value != null && (type == 'object' || type == 'function');
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}
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module.exports = isFunction;
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