VEGAS JS Class: Equals

Class: Equals

system .rules. Equals

new Equals( [value1] [, value2])

Used to perform a logical conjunction on two conditions and more.

Parameters:

Name	Type	Argument	Default	Description
`value1`	Object \| system.rules.Rule \| system.Equatable	<optional>	null	The first value to evaluate.
`value2`	Object \| system.rules.Rule \| system.Equatable	<optional>	null	The second value to evaluate.

Implements:

system.rules.Rule

Example

var BooleanRule = system.rules.BooleanRule ;
var Equals      =  system.rules.Equals ;

var e ;

///// Compares objects.

e = new Equals( 1 , 1 ) ;
trace( e.eval() ) ; // true

e = new Equals( 1 , 2 ) ;
trace( e.eval() ) ; // false

///// Compares Rule objects.

var cond1 = new BooleanRule( true  ) ;
var cond2 = new BooleanRule( false ) ;
var cond3 = new BooleanRule( true  ) ;

e = new Equals( cond1 , cond1 ) ;
trace( e.eval() ) ; // true

e = new Equals( cond1 , cond2 ) ;
trace( e.eval() ) ; // false

e = new Equals( cond1 , cond3 ) ;
trace( e.eval() ) ; // true

///// Compares Equatable objects.

var equals = function( o )
{
    return this.id === o.id ;
}

var o1 = { id:1 , equals:equals } ;
var o2 = { id:2 , equals:equals } ;
var o3 = { id:1 , equals:equals } ;

e = new Equals( o1 , o1 ) ;
trace( e.eval() ) ; // true

e = new Equals( o1 , o2 ) ;
trace( e.eval() ) ; // false

e = new Equals( o1 , o3 ) ;
trace( e.eval() ) ; // true