Cond.js

function cond(){
        for(var i in arguments ){
                if( arguments[i][0] ){
                        arguments[i][1]();
                        break;
                }
        }
}
 
var x = -1;
cond(
        [x > 0, function(){  console.log(x + "  is  positive"); }],  
        [x === 0, function(){ console.log (x + " is zero"); } ],       
        [x < 0, function(){ console.log(x + " is negative"); }] 
);