function wrap( value ) {
	return constantFunction;

	/**
	* Constant function.
	*
	* @private
	* @returns {*} constant value
	*/
	function constantFunction() {
		return value;
	}
}
Creates a function which always returns the same value.

@param {*} [value] - value to always return
@returns {Function} constant function

@example
var fcn = wrap( 3.14 );

var v = fcn();
// returns 3.14

v = fcn();
// returns 3.14

v = fcn();
// returns 3.14