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isa-lib - npm Package Compare versions

Comparing version 0.0.3 to 0.0.4

510

lib/isA.js
/**
* Copyright 2013 Gabriel Harrison
* The MIT License
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
* Copyright (c) 2013 Gabriel Harrison
*
* http://www.apache.org/licenses/LICENSE-2.0
* 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.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* 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.
*
* isA.js

@@ -39,265 +47,275 @@ *

* @author Gabriel Harrison (nyteshade AT gmail.com)
* @version 1.0
* @version 0.0.4
*/
var hasExports = typeof(exports) != 'undefined',
namespace = hasExports ? exports :
(typeof (window) != 'undefined') ? window :
(typeof (global) != 'undefined') ? global : null;
(function() {
"use strict";
if (!namespace) {
console.error('Cannot locate place to export library to!');
throw new Error('Missing namespace!');
}
var hasExports = typeof(exports) != 'undefined',
namespace = hasExports ? exports :
(typeof (window) != 'undefined') ? window :
(typeof (global) != 'undefined') ? global : null;
var library = (function(exports) {
/**
* Declare an array of Strings reported by the JavaScript VM to be the
* actual toString() representation of a particular base type such that
* it can be repeatedly compared with accuracy using the functions below.
*
* By not hardcoding the Strings here, we can guarantee that we are seeing
* unique types.
*/
exports.IS_A = {
UNDEFINED: Object.prototype.toString.call(undefined),
FUNCTION: Object.prototype.toString.call(Function()),
BOOLEAN: Object.prototype.toString.call(Boolean()),
OBJECT: Object.prototype.toString.call(Object()),
REGEXP: Object.prototype.toString.call(RegExp()),
STRING: Object.prototype.toString.call(String()),
NUMBER: Object.prototype.toString.call(Number()),
ARRAY: Object.prototype.toString.call(Array()),
ERROR: Object.prototype.toString.call(Error()),
NULL: Object.prototype.toString.call(null)
};
if (!namespace) {
console.error('Cannot locate place to export library to!');
throw new Error('Missing namespace!');
}
/* This back reference array allows us to quickly map existing constructors
* for base types to their appropriate strings without having to create new
* instances of the type for comparison. */
var backRef = exports.IS_A_BACKREF = [
undefined, exports.IS_A.UNDEFINED,
Function, exports.IS_A.FUNCTION,
Boolean, exports.IS_A.BOOLEAN,
Object, exports.IS_A.OBJECT,
RegExp, exports.IS_A.REGEXP,
String, exports.IS_A.STRING,
Number, exports.IS_A.NUMBER,
Array, exports.IS_A.ARRAY,
Error, exports.IS_A.ERROR,
null, exports.IS_A.NULL
];
var library = (function(exports) {
/**
* Declare an array of Strings reported by the JavaScript VM to be the
* actual toString() representation of a particular base type such that
* it can be repeatedly compared with accuracy using the functions below.
*
* By not hardcoding the Strings here, we can guarantee that we are seeing
* unique types.
*/
exports.IS_A = {
UNDEFINED: Object.prototype.toString.call(undefined),
FUNCTION: Object.prototype.toString.call(new Function()),
BOOLEAN: Object.prototype.toString.call(true),
OBJECT: Object.prototype.toString.call({}),
REGEXP: Object.prototype.toString.call(new RegExp()),
STRING: Object.prototype.toString.call(""),
NUMBER: Object.prototype.toString.call(1),
ARRAY: Object.prototype.toString.call([]),
ERROR: Object.prototype.toString.call(new Error()),
NULL: Object.prototype.toString.call(null)
};
if (!backRef.indexOf) {
backRef.indexOf = function(obj) {
for (var i = 0; i < backRef.length; i++) {
if (backRef[i] === obj) {
return i;
/* This back reference array allows us to quickly map existing constructors
* for base types to their appropriate strings without having to create new
* instances of the type for comparison. */
var backRef = exports.IS_A_BACKREF = [
undefined, exports.IS_A.UNDEFINED,
Function, exports.IS_A.FUNCTION,
Boolean, exports.IS_A.BOOLEAN,
Object, exports.IS_A.OBJECT,
RegExp, exports.IS_A.REGEXP,
String, exports.IS_A.STRING,
Number, exports.IS_A.NUMBER,
Array, exports.IS_A.ARRAY,
Error, exports.IS_A.ERROR,
null, exports.IS_A.NULL
];
if (!backRef.indexOf) {
backRef.indexOf = function(obj) {
for (var i = 0; i < backRef.length; i++) {
if (backRef[i] === obj) {
return i;
}
}
}
return -1;
return -1;
};
}
/** Quick reference function to get correct offset of backRef */
backRef.matchingType = function(baseConstructor) {
var pos = this.indexOf(baseConstructor);
if (pos === -1) { return Object.prototype.toString.call(baseConstructor); }
return this[pos + 1];
};
}
/** Quick reference function to get correct offset of backRef */
backRef.matchingType = function(baseConstructor) {
var pos = this.indexOf(baseConstructor);
if (pos === -1) { return Object.prototype.toString.call(baseConstructor); }
return this[pos + 1];
};
/* Quick test to guarantee we have no repeated types and provide a way to
* measure the accuracy of our comparison "constants" */
var _t, _t2, _count = 0, _unique = 0, _questionable = [];
for (_t in exports.IS_A) {
if (exports.IS_A.hasOwnProperty(_t)) {
var unique = true;
for (_t2 in exports.IS_A) {
if (exports.IS_A.hasOwnProperty(_t)) {
if (_t === _t2) { continue; }
unique = exports.IS_A[_t] !== exports.IS_A[_t2];
if (!unique) {
_questionable.push([_t, _t2]);
break;
/* Quick test to guarantee we have no repeated types and provide a way to
* measure the accuracy of our comparison "constants" */
var _t, _t2, _count = 0, _unique = 0, _questionable = [];
for (_t in exports.IS_A) {
if (exports.IS_A.hasOwnProperty(_t)) {
var unique = true;
for (_t2 in exports.IS_A) {
if (exports.IS_A.hasOwnProperty(_t2)) {
if (_t === _t2) { continue; }
unique = exports.IS_A[_t] !== exports.IS_A[_t2];
if (!unique) {
_questionable.push([_t, _t2]);
break;
}
}
}
if (unique) { _unique++; }
}
if (unique) { _unique++; }
_count++;
}
_count++;
}
/**
* This property should reflect 1 if every type in the IS_A dictionary
* reported unique values. This will quickly tell you if your assumptions
* about toString() results will be accurate or not. In the case of a value
* less than 1, exports.IS_A_QUESTIONABLE will contain pairs of keys that
* returned the same value for your own debugging pleasure.
*/
exports.IS_A_ACCURACY = _unique / _count;
exports.IS_A_QUESTIONABLE = _questionable;
if (exports.IS_A_ACCURACY !== 1.0) {
console.warn('IS_A dictionary reported non-unique value pairs: ',
exports.IS_A_QUESTIONABLE);
}
/**
* Cross JavaScript VM method to definitively test the type that an object
* reports to the JavaScript engine itself. Accuracy will decline and/or
* vary if the type is not one of the types listed in exports.IS_A, above.
*/
exports.isA = function(type, object) {
if (arguments.length === 1) {
return Object.prototype.toString.call(type)
/**
* This property should reflect 1 if every type in the IS_A dictionary
* reported unique values. This will quickly tell you if your assumptions
* about toString() results will be accurate or not. In the case of a value
* less than 1, exports.IS_A_QUESTIONABLE will contain pairs of keys that
* returned the same value for your own debugging pleasure.
*/
exports.IS_A_ACCURACY = _unique / _count;
exports.IS_A_QUESTIONABLE = _questionable;
if (exports.IS_A_ACCURACY !== 1.0) {
console.warn('IS_A dictionary reported non-unique value pairs: ',
exports.IS_A_QUESTIONABLE);
}
else {
var typeString = Object.prototype.toString.call(object);
return typeString === type
|| typeString === exports.IS_A[type]
|| typeString === backRef.matchingType(type);
}
};
/**
* Not the most efficient way to test for undefined, but follows suit with
* the other methods in this suite.
*
* @param object any object to be tested
* @return true if the object is undefined, false otherwise
*/
exports.isUndefined = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.UNDEFINED;
};
/**
* Cross JavaScript VM method to definitively test the type that an object
* reports to the JavaScript engine itself. Accuracy will decline and/or
* vary if the type is not one of the types listed in exports.IS_A, above.
*/
exports.isA = function(type, object) {
if (arguments.length === 1) {
return Object.prototype.toString.call(type)
}
else {
var typeString = Object.prototype.toString.call(object);
return typeString === type
|| typeString === exports.IS_A[type]
|| typeString === backRef.matchingType(type);
}
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a Function.
*
* @param object any object to be tested
* @return true if the object is a function, false otherwise
*/
exports.isFunction = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.FUNCTION;
};
/**
* Not the most efficient way to test for undefined, but follows suit with
* the other methods in this suite.
*
* @param object any object to be tested
* @return boolean true if the object is undefined, false otherwise
*/
exports.isUndefined = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.UNDEFINED;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a Boolean.
*
* @param object any object to be tested
* @return true if the object is a Boolean, false otherwise
*/
exports.isBoolean = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.BOOLEAN;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a Function.
*
* @param object any object to be tested
* @return boolean true if the object is a function, false otherwise
*/
exports.isFunction = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.FUNCTION;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a RegExp.
*
* @param object any object to be tested
* @return true if the object is a RegExp, false otherwise
*/
exports.isObject = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.OBJECT;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a Boolean.
*
* @param object any object to be tested
* @return boolean true if the object is a Boolean, false otherwise
*/
exports.isBoolean = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.BOOLEAN;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a RegExp.
*
* @param object any object to be tested
* @return true if the object is a RegExp, false otherwise
*/
exports.isRegExp = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.REGEXP;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a RegExp.
*
* @param object any object to be tested
* @return boolean true if the object is a RegExp, false otherwise
*/
exports.isObject = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.OBJECT;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a String.
*
* @param object any object to be tested
* @return true if the object is a String, false otherwise
*/
exports.isString = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.STRING;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a RegExp.
*
* @param object any object to be tested
* @return boolean true if the object is a RegExp, false otherwise
*/
exports.isRegExp = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.REGEXP;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a Number.
*
* @param object any object to be tested
* @return true if the object is a Number, false otherwise
*/
exports.isNumber = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.NUMBER;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a String.
*
* @param object any object to be tested
* @return boolean true if the object is a String, false otherwise
*/
exports.isString = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.STRING;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of an Array.
*
* @param object any object to be tested
* @return true if the object is an Array, false otherwise
*/
exports.isArray = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.ARRAY;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of a Number.
*
* @param object any object to be tested
* @return boolean true if the object is a Number, false otherwise
*/
exports.isNumber = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.NUMBER;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of an Error.
*
* @param object any object to be tested
* @return true if the object is an Error, false otherwise
*/
exports.isError = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.ERROR;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of an Array.
*
* @param object any object to be tested
* @return boolean true if the object is an Array, false otherwise
*/
exports.isArray = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.ARRAY;
};
/**
* Not the most efficient way to test for null, but follows suit with
* the other methods in this suite.
*
* @param object any object to be tested
* @return true if the object is null, false otherwise
*/
exports.isNull = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.NULL;
};
/**
* Cross JavaScript VM method to definitively test whether or not an object
* is an instance of an Error.
*
* @param object any object to be tested
* @return boolean true if the object is an Error, false otherwise
*/
exports.isError = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.ERROR;
};
/**
* Inject isA library to the supplied scope. If null or undefined are given
* as the destinationScope an exception will be thrown.
*
* @param destinationScope the scope to dump these library functions to
*/
exports.INJECT_IS_A_LIB = function(destinationScope) {
if (destinationScope === null || destinationScope === undefined) {
throw new Error("Cannot locate destination scope to install to.");
}
for (var property in exports) {
if (exports.hasOwnProperty(property)) {
destinationScope[property] = exports[property];
/**
* Not the most efficient way to test for null, but follows suit with
* the other methods in this suite.
*
* @param object any object to be tested
* @return boolean true if the object is null, false otherwise
*/
exports.isNull = function(object) {
return Object.prototype.toString.call(object) === exports.IS_A.NULL;
};
/**
* Inject isA library to the supplied scope. If null or undefined are given
* as the destinationScope an exception will be thrown.
*
* @param destinationScope the scope to dump these library functions to
* @return object the exports object
*/
exports.INJECT_IS_A_LIB = function(destinationScope) {
if (destinationScope === null || destinationScope === undefined) {
throw new Error("Cannot locate destination scope to install to.");
}
}
for (var property in exports) {
if (exports.hasOwnProperty(property)) {
destinationScope[property] = exports[property];
}
}
return exports;
};
return exports;
};
})({});
return exports;
})({});
if (hasExports && typeof module !== 'undefined') {
module.exports = function(destination) {
if (!destination) {
return library;
}
else {
return library.INJECT_IS_A_LIB(destination);
}
};
}
else if (typeof window !== 'undefined') {
library.INJECT_IS_A_LIB(window);
}
else {
namespace.isA = library;
}
})();
if (hasExports) {
module.exports = function(destination) {
if (!destination) {
return library;
}
else {
return library.INJECT_IS_A_LIB(destination);
}
};
}
else {
namespace.isA = library.INJECT_IS_A_LIB(namespace);
}
/*jslint browser:true,indent:2,node:true*/

@@ -5,3 +5,3 @@ {

"description": "Reusable Object.prototype.toString type checking library",
"version": "0.0.3",
"version": "0.0.4",
"repository": {

@@ -8,0 +8,0 @@ "url": "https://github.com/nyteshade/isA.git"

@@ -6,16 +6,24 @@ <h1>

<h2>License</h2>
Copyright 2013 Gabriel Harrison
The MIT License
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Copyright (c) 2013 Gabriel Harrison
http://www.apache.org/licenses/LICENSE-2.0
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:
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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.
<h2>Installation</h2>

@@ -22,0 +30,0 @@

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