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/**
* Differrent helper functions
*
* @author Ilya Lebedev <ilya@lebedev.net>
* @license LGPL
*/
//-----------------------------------------------------------------------------
// Variable/property checks
//-----------------------------------------------------------------------------
/**
* Checks if property is undefined
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isUndefined (prop /* :Object */) /* :Boolean */ {
return (typeof prop == 'undefined');
}
/**
* Checks if property is function
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isFunction (prop /* :Object */) /* :Boolean */ {
return (typeof prop == 'function');
}
/**
* Checks if property is string
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isString (prop /* :Object */) /* :Boolean */ {
return (typeof prop == 'string');
}
/**
* Checks if property is number
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isNumber (prop /* :Object */) /* :Boolean */ {
return (typeof prop == 'number');
}
/**
* Checks if property is the calculable number
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isNumeric (prop /* :Object */) /* :Boolean */ {
return isNumber(prop)&&!isNaN(prop)&&isFinite(prop);
}
/**
* Checks if property is array
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isArray (prop /* :Object */) /* :Boolean */ {
return (prop instanceof Array);
}
/**
* Checks if property is regexp
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isRegExp (prop /* :Object */) /* :Boolean */ {
return (prop instanceof RegExp);
}
/**
* Checks if property is a boolean value
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isBoolean (prop /* :Object */) /* :Boolean */ {
return ('boolean' == typeof prop);
}
/**
* Checks if property is a scalar value (value that could be used as the hash key)
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isScalar (prop /* :Object */) /* :Boolean */ {
return isNumeric(prop)||isString(prop);
}
/**
* Checks if property is empty
*
* @param {Object} prop value to check
* @return {Boolean} true if matched
* @scope public
*/
function isEmpty (prop /* :Object */) /* :Boolean */ {
if (isBoolean(prop)) return false;
if (isRegExp(prop) && new RegExp("").toString() == prop.toString()) return true;
if (isString(prop) || isNumber(prop)) return !prop;
if (Boolean(prop)&&false != prop) {
for (var i in prop) if(prop.hasOwnProperty(i)) return false
}
return true;
}
/**
* Checks if property is derived from prototype, applies method if it is not exists
*
* @param string property name
* @return bool true if prototyped
* @access public
*/
if ('undefined' == typeof Object.hasOwnProperty) {
Object.prototype.hasOwnProperty = function (prop) {
return !('undefined' == typeof this[prop] || this.constructor && this.constructor.prototype[prop] && this[prop] === this.constructor.prototype[prop]);
}
}
/**
* Very simplistic Flash plugin check, probably works for Flash 8 and higher only
*/
function hasFlash(version){
var ver = 0;
try{
if(navigator.plugins != null && navigator.plugins.length > 0){
ver = navigator.plugins["Shockwave Flash"].description.split(' ')[2].split('.')[0];
}else{
var axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
ver = axo.GetVariable("$version").split(' ')[1].split(',')[0];
}
}catch(e){ }
if(ver >= version) return true;
return false;
}
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