trotzig/diffux

define(function() {

function addGetHookIf( conditionFn, hookFn ) {
    // Define the hook, we'll check on the first run if it's really needed.
    return {
        get: function() {
            if ( conditionFn() ) {
                // Hook not needed (or it's not possible to use it due
                // to missing dependency), remove it.
                delete this.get;
                return;
            }

            // Hook needed; redefine it so that the support test is not executed again.
            return (this.get = hookFn).apply( this, arguments );
        }
    };
}

return addGetHookIf;

});