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- var MAX_SAFE_INTEGER = 9007199254740991;
- var argsTag = '[object Arguments]',
- funcTag = '[object Function]',
- genTag = '[object GeneratorFunction]',
- mapTag = '[object Map]',
- objectTag = '[object Object]',
- promiseTag = '[object Promise]',
- setTag = '[object Set]',
- weakMapTag = '[object WeakMap]';
- var dataViewTag = '[object DataView]';
- var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
- var reIsHostCtor = /^\[object .+?Constructor\]$/;
- var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
- var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
- var root = freeGlobal || freeSelf || Function('return this')();
- var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
- var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
- var moduleExports = freeModule && freeModule.exports === freeExports;
- function getValue(object, key) {
- return object == null ? undefined : object[key];
- }
- function isHostObject(value) {
-
-
- var result = false;
- if (value != null && typeof value.toString != 'function') {
- try {
- result = !!(value + '');
- } catch (e) {}
- }
- return result;
- }
- function overArg(func, transform) {
- return function(arg) {
- return func(transform(arg));
- };
- }
- var funcProto = Function.prototype,
- objectProto = Object.prototype;
- var coreJsData = root['__core-js_shared__'];
- var maskSrcKey = (function() {
- var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
- return uid ? ('Symbol(src)_1.' + uid) : '';
- }());
- var funcToString = funcProto.toString;
- var hasOwnProperty = objectProto.hasOwnProperty;
- var objectToString = objectProto.toString;
- var reIsNative = RegExp('^' +
- funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
- .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
- );
- var Buffer = moduleExports ? root.Buffer : undefined,
- propertyIsEnumerable = objectProto.propertyIsEnumerable;
- var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
- nativeKeys = overArg(Object.keys, Object);
- var DataView = getNative(root, 'DataView'),
- Map = getNative(root, 'Map'),
- Promise = getNative(root, 'Promise'),
- Set = getNative(root, 'Set'),
- WeakMap = getNative(root, 'WeakMap');
- var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
- var dataViewCtorString = toSource(DataView),
- mapCtorString = toSource(Map),
- promiseCtorString = toSource(Promise),
- setCtorString = toSource(Set),
- weakMapCtorString = toSource(WeakMap);
- function baseGetTag(value) {
- return objectToString.call(value);
- }
- function baseIsNative(value) {
- if (!isObject(value) || isMasked(value)) {
- return false;
- }
- var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
- return pattern.test(toSource(value));
- }
- function getNative(object, key) {
- var value = getValue(object, key);
- return baseIsNative(value) ? value : undefined;
- }
- var getTag = baseGetTag;
- if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
- (Map && getTag(new Map) != mapTag) ||
- (Promise && getTag(Promise.resolve()) != promiseTag) ||
- (Set && getTag(new Set) != setTag) ||
- (WeakMap && getTag(new WeakMap) != weakMapTag)) {
- getTag = function(value) {
- var result = objectToString.call(value),
- Ctor = result == objectTag ? value.constructor : undefined,
- ctorString = Ctor ? toSource(Ctor) : undefined;
- if (ctorString) {
- switch (ctorString) {
- case dataViewCtorString: return dataViewTag;
- case mapCtorString: return mapTag;
- case promiseCtorString: return promiseTag;
- case setCtorString: return setTag;
- case weakMapCtorString: return weakMapTag;
- }
- }
- return result;
- };
- }
- function isMasked(func) {
- return !!maskSrcKey && (maskSrcKey in func);
- }
- function isPrototype(value) {
- var Ctor = value && value.constructor,
- proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
- return value === proto;
- }
- function toSource(func) {
- if (func != null) {
- try {
- return funcToString.call(func);
- } catch (e) {}
- try {
- return (func + '');
- } catch (e) {}
- }
- return '';
- }
- function isArguments(value) {
-
- return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
- (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
- }
- var isArray = Array.isArray;
- function isArrayLike(value) {
- return value != null && isLength(value.length) && !isFunction(value);
- }
- function isArrayLikeObject(value) {
- return isObjectLike(value) && isArrayLike(value);
- }
- var isBuffer = nativeIsBuffer || stubFalse;
- function isEmpty(value) {
- if (isArrayLike(value) &&
- (isArray(value) || typeof value == 'string' ||
- typeof value.splice == 'function' || isBuffer(value) || isArguments(value))) {
- return !value.length;
- }
- var tag = getTag(value);
- if (tag == mapTag || tag == setTag) {
- return !value.size;
- }
- if (nonEnumShadows || isPrototype(value)) {
- return !nativeKeys(value).length;
- }
- for (var key in value) {
- if (hasOwnProperty.call(value, key)) {
- return false;
- }
- }
- return true;
- }
- function isFunction(value) {
-
-
- var tag = isObject(value) ? objectToString.call(value) : '';
- return tag == funcTag || tag == genTag;
- }
- function isLength(value) {
- return typeof value == 'number' &&
- value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
- }
- function isObject(value) {
- var type = typeof value;
- return !!value && (type == 'object' || type == 'function');
- }
- function isObjectLike(value) {
- return !!value && typeof value == 'object';
- }
- function stubFalse() {
- return false;
- }
- module.exports = isEmpty;
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