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node_modules/core-util-is/lib/util.js
| 107 lines
| 3.0 KiB
| application/javascript
| JavascriptLexer
|
| r789 | // Copyright Joyent, Inc. and other Node contributors. | |||
| // | ||||
| // Permission is hereby granted, free of charge, to any person obtaining a | ||||
| // copy of this software and associated documentation files (the | ||||
| // "Software"), to deal in the Software without restriction, including | ||||
| // without limitation the rights to use, copy, modify, merge, publish, | ||||
| // distribute, sublicense, and/or sell copies of the Software, and to permit | ||||
| // persons to whom the Software is furnished to do so, subject to the | ||||
| // following conditions: | ||||
| // | ||||
| // The above copyright notice and this permission notice shall be included | ||||
| // in all copies or substantial portions of the Software. | ||||
| // | ||||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||||
| // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||||
| // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN | ||||
| // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | ||||
| // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | ||||
| // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | ||||
| // USE OR OTHER DEALINGS IN THE SOFTWARE. | ||||
| // NOTE: These type checking functions intentionally don't use `instanceof` | ||||
| // because it is fragile and can be easily faked with `Object.create()`. | ||||
| function isArray(arg) { | ||||
| if (Array.isArray) { | ||||
| return Array.isArray(arg); | ||||
| } | ||||
| return objectToString(arg) === '[object Array]'; | ||||
| } | ||||
| exports.isArray = isArray; | ||||
| function isBoolean(arg) { | ||||
| return typeof arg === 'boolean'; | ||||
| } | ||||
| exports.isBoolean = isBoolean; | ||||
| function isNull(arg) { | ||||
| return arg === null; | ||||
| } | ||||
| exports.isNull = isNull; | ||||
| function isNullOrUndefined(arg) { | ||||
| return arg == null; | ||||
| } | ||||
| exports.isNullOrUndefined = isNullOrUndefined; | ||||
| function isNumber(arg) { | ||||
| return typeof arg === 'number'; | ||||
| } | ||||
| exports.isNumber = isNumber; | ||||
| function isString(arg) { | ||||
| return typeof arg === 'string'; | ||||
| } | ||||
| exports.isString = isString; | ||||
| function isSymbol(arg) { | ||||
| return typeof arg === 'symbol'; | ||||
| } | ||||
| exports.isSymbol = isSymbol; | ||||
| function isUndefined(arg) { | ||||
| return arg === void 0; | ||||
| } | ||||
| exports.isUndefined = isUndefined; | ||||
| function isRegExp(re) { | ||||
| return objectToString(re) === '[object RegExp]'; | ||||
| } | ||||
| exports.isRegExp = isRegExp; | ||||
| function isObject(arg) { | ||||
| return typeof arg === 'object' && arg !== null; | ||||
| } | ||||
| exports.isObject = isObject; | ||||
| function isDate(d) { | ||||
| return objectToString(d) === '[object Date]'; | ||||
| } | ||||
| exports.isDate = isDate; | ||||
| function isError(e) { | ||||
| return (objectToString(e) === '[object Error]' || e instanceof Error); | ||||
| } | ||||
| exports.isError = isError; | ||||
| function isFunction(arg) { | ||||
| return typeof arg === 'function'; | ||||
| } | ||||
| exports.isFunction = isFunction; | ||||
| function isPrimitive(arg) { | ||||
| return arg === null || | ||||
| typeof arg === 'boolean' || | ||||
| typeof arg === 'number' || | ||||
| typeof arg === 'string' || | ||||
| typeof arg === 'symbol' || // ES6 symbol | ||||
| typeof arg === 'undefined'; | ||||
| } | ||||
| exports.isPrimitive = isPrimitive; | ||||
| exports.isBuffer = Buffer.isBuffer; | ||||
| function objectToString(o) { | ||||
| return Object.prototype.toString.call(o); | ||||
| } | ||||