Predicate

function

Predicate()

Option name	Type	Description
value	Object	the predicate value
type	Object	the type of predicate

Predicate. Used to filter a column

function Predicate(value, type) {
		var self = this;
		this.value = value;
		this.type = type;

evaluate

method

self.evaluate() ->Boolean

Get the next matching block from the column, filtered by a predicate
Predicates
E Equals
GT Greater Than
LT Less Than
GTE Greater Than or Equal to
LTE Less Than or Equal to
NE Not Equal

self.evaluate = function(lhBlock){
			var result = false;
			switch(this.type){
				case 'GT':
					result = lhBlock.value > this.value;
					break;
				case 'GTE':
					result = lhBlock.value >= this.value;
					break;
				case 'LT':
					result = lhBlock.value < this.value;
					break;
				case 'LTE':
					result = lhBlock.value <= this.value;
					break;
				case 'NE':
					result = lhBlock.value !== this.value;
					break;
				default:
					result = lhBlock.value === this.value;
					break;
			}
			return result;
		};
	}
	return Predicate;
});