Pinsave/counterstrike

1// Copyright Joyent, Inc. and other Node contributors.2//3// Permission is hereby granted, free of charge, to any person obtaining a4// copy of this software and associated documentation files (the5// "Software"), to deal in the Software without restriction, including6// without limitation the rights to use, copy, modify, merge, publish,7// distribute, sublicense, and/or sell copies of the Software, and to permit8// persons to whom the Software is furnished to do so, subject to the9// following conditions:10//11// The above copyright notice and this permission notice shall be included12// in all copies or substantial portions of the Software.13//14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE20// USE OR OTHER DEALINGS IN THE SOFTWARE.21 22// NOTE: These type checking functions intentionally don't use `instanceof`23// because it is fragile and can be easily faked with `Object.create()`.24 25function isArray(arg) {26  if (Array.isArray) {27    return Array.isArray(arg);28  }29  return objectToString(arg) === '[object Array]';30}31exports.isArray = isArray;32 33function isBoolean(arg) {34  return typeof arg === 'boolean';35}36exports.isBoolean = isBoolean;37 38function isNull(arg) {39  return arg === null;40}41exports.isNull = isNull;42 43function isNullOrUndefined(arg) {44  return arg == null;45}46exports.isNullOrUndefined = isNullOrUndefined;47 48function isNumber(arg) {49  return typeof arg === 'number';50}51exports.isNumber = isNumber;52 53function isString(arg) {54  return typeof arg === 'string';55}56exports.isString = isString;57 58function isSymbol(arg) {59  return typeof arg === 'symbol';60}61exports.isSymbol = isSymbol;62 63function isUndefined(arg) {64  return arg === void 0;65}66exports.isUndefined = isUndefined;67 68function isRegExp(re) {69  return objectToString(re) === '[object RegExp]';70}71exports.isRegExp = isRegExp;72 73function isObject(arg) {74  return typeof arg === 'object' && arg !== null;75}76exports.isObject = isObject;77 78function isDate(d) {79  return objectToString(d) === '[object Date]';80}81exports.isDate = isDate;82 83function isError(e) {84  return (objectToString(e) === '[object Error]' || e instanceof Error);85}86exports.isError = isError;87 88function isFunction(arg) {89  return typeof arg === 'function';90}91exports.isFunction = isFunction;92 93function isPrimitive(arg) {94  return arg === null ||95         typeof arg === 'boolean' ||96         typeof arg === 'number' ||97         typeof arg === 'string' ||98         typeof arg === 'symbol' ||  // ES6 symbol99         typeof arg === 'undefined';100}101exports.isPrimitive = isPrimitive;102 103exports.isBuffer = require('buffer').Buffer.isBuffer;104 105function objectToString(o) {106  return Object.prototype.toString.call(o);107}108