VCheck

Key/Value Event Callback helper that checks the passed Value type and based on the type, to launch passed functions.

VCheck is a very light-weight helper function that does only one thing, but does it well.

Requirements: Underscore.js (Used for datatype checking)

PHP Version: https://github.com/NotNull/VCheck-PHP

**** Future Changes ****

• Introducing chaining calls:

v(unknownVariable).isString(function(){}).isObject(function(){});

• Introducing more helper functions.
• Taking away dependency on Underscore, but will wrap around Underscore if present.

---

Example usage:

var unknownType = "I am a string";

VCheck(unknownType, {
  'function': function(value){
    console.log('I am a function!');
  },
  number: function(value){
    console.log('I am a number!');
  },
  string: function(value){
    console.log('I am a string!');
  }
});

//Output: 'I am a string!'

The datatype that matches the passed variable launches the passed callback if the datatype equals true.

You can also pass extra parameters to launch a callback based on matching or not.

var unknownType = "I am a string";

VCheck(unknownType, {
  'function': function(value){
    console.log('I am a function!');
  },
  number: {
    'true': function(value){
      console.log('I am a number!');
    },
    'false': function(value){
      console.log('I am not a number!');    
    }
  },
  string: function(value){
    console.log('I am a string!');
  }
});

//Output: 'I am not a number!'
//Output: 'I am a string!'

By default, if a datatype returns true, it does not check against any other passed params that come after. But, you can set it to do so.

var unknownType = 9001;

VCheck(unknownType, {
  typeSensitive: false,
  'function': function(value){
    console.log('I am a function!');
  },
  number: function(value){
    if(value > 9000)
      console.log("I'm over 9000!");
      
  }, 
  finite: function(value){
    if(value > 9000)
      console.log("I'm over 9000!");
      
  }, 
  string: function(value){
    console.log('I am a string!');
  }
});

//Output: "I'm over 9000!";
//Output: "I'm over 9000!";

You can also bind Events to a element.

VCheck($('#div')[0], {
	'mouseevent': {
		preventDefault: true,
		contextMenu: false,
		'left': function(){
			alert('You pressed the left mouse button!');
		},
		'middle': function(){
			alert('You pressed the middle mouse button!');
		},
		'right': function(){
			alert('You pressed the right mouse button!');
		}
	},
	'keyup': {
		'f': function(e){
			alert('You hit the F key!');
		}
	}
});