Valuedate

Description	Validates values using a schema.
Language	Actionscript 3
Source	http://github.com/headjump/valuedate

Sample

// chained validation
	var my_value:int = 15;
	Assure.value.isA(Number).inRange(10, 20).validate(my_value); // => true

// validating Object structure (with optional properties)

	// Test objects
	var admin:Object = {
		role: "admin",
		info: {
			title: "I'm admin"
		}
	};	
	var user:Object = {
		role: "user"
	};
	var mother:Object = {
		role: "your mother",
		age: 88
	};

	// Validation schema
	var schema:Assure = Assure.value.forProperties( {
		role: 	Assure.value.equalsOneOf("admin","user"),
		info: 	Assure.optional_value.forProperties( {
			title: Assure.value.isA(String)
		})
	});

	// Validating...
	schema.validate(admin);  // => true
	schema.validate(user);   // => true
	schema.validate(mother); // => false

Template for your own Assures:

Add a function in Assure.as to the Assure class, following this template:

Template

	public function myFunction(my_params):Assure {
		return check(function(value:*) {
			// here goes your code!
			// @value is the value to validate
			//	if @value matches your constraints: do nothing
			// 	otherwise: throw an Error!
		});
	}

The validate(...) function you call to validate a value catches your errors. If there are any, it returns false, otherwise true.
So all you have to do is throw an Error if your constraints are violated.

Example

	public function isA(c:Class):Assure {
		return check(function(value:*) {
			if (!(value is c)) throw new Error("!ofClass " + [value, c]);
		});
	}