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helpers.js
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helpers.js
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Espionage = {};
Espionage.Helpers = function() {
var object = function(obj) {
function F() {}
F.prototype = obj;
return new F();
};
var alias = function(obj, new_name, old_name) {
obj[new_name] = obj[old_name];
};
var numberToWordMapper = function() {
var mapping = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
var count = mapping.length;
function throwIfInvalidNumber(number) {
if (number < 0 || isNaN(number)) {
throw({
name: "TypeError",
message: "Invalid number. numberToWord only accepts positive integers"
});
}
}
function mapToString(number) {
return mapping[number];
}
function numToString(number) {
return parseInt(number, 10).toString();
}
function convertToString(number) {
return (number >= count) ? numToString(number) : mapToString(number);
}
function map(number) {
throwIfInvalidNumber(number);
return convertToString(number);
}
return {
map: map
};
}();
var numberToWord = function(number) {
return numberToWordMapper.map(number);
};
var numberOfTimesInWords = function(number) {
switch(number) {
case 1:
return "once";
case 2:
return "twice";
default:
return numberToWord(number) + " times";
}
};
// the following is coppied from jQuery
// See test/unit/core.js for details concerning isFunction.
// Since version 1.3, DOM methods and functions like alert
// aren't supported. They return false on IE (#2968).
var isFunction = function( obj ) {
return toString.call(obj) === "[object Function]" || obj instanceof Function;
};
var grep = function( elems, callback, inv ) {
var ret = [];
// Go through the array, only saving the items
// that pass the validator function
for ( var i = 0, length = elems.length; i < length; i++ ) {
if ( !inv !== !callback( elems[ i ], i ) ) {
ret.push( elems[ i ] );
}
}
return ret;
};
var map = function( elems, callback, arg ) {
var ret = [], value;
// Go through the array, translating each of the items to their
// new value (or values).
for ( var i = 0, length = elems.length; i < length; i++ ) {
value = callback( elems[ i ], i, arg );
if ( value != null ) {
ret[ ret.length ] = value;
}
}
return ret.concat.apply( [], ret );
};
var merge = function( first, second ) {
var i = first.length, j = 0;
if ( typeof second.length === "number" ) {
for ( var l = second.length; j < l; j++ ) {
first[ i++ ] = second[ j ];
}
} else {
while ( second[j] !== undefined ) {
first[ i++ ] = second[ j++ ];
}
}
first.length = i;
return first;
};
var makeArray = function( array, results ) {
var ret = results || [];
if ( array != null ) {
// The window, strings (and functions) also have 'length'
// The extra typeof function check is to prevent crashes
// in Safari 2 (See: #3039)
if ( array.length == null || typeof array === "string" || isFunction(array) || (typeof array !== "function" && array.setInterval) ) {
push.call( ret, array );
} else {
merge( ret, array );
}
}
return ret;
};
var each = function( object, callback, args ) {
var name, i = 0,
length = object.length,
isObj = length === undefined || isFunction(object);
if ( args ) {
if ( isObj ) {
for ( name in object ) {
if ( callback.apply( object[ name ], args ) === false ) {
break;
}
}
} else {
for ( ; i < length; ) {
if ( callback.apply( object[ i++ ], args ) === false ) {
break;
}
}
}
// A special, fast, case for the most common use of each
} else {
if ( isObj ) {
for ( name in object ) {
if ( callback.call( object[ name ], name, object[ name ] ) === false ) {
break;
}
}
} else {
for ( var value = object[0];
i < length && callback.call( value, i, value ) !== false; value = object[++i] ) {}
}
}
return object;
};
return {
object: object,
alias: alias,
numberToWord: numberToWord,
numberOfTimesInWords: numberOfTimesInWords,
// jquery methods
makeArray: makeArray,
isFunction: isFunction,
grep: grep,
map: map,
each: each
};
}();
Espionage.Helpers.alias(Espionage.Helpers, "clone", "object");