Javascript: Partial Applications: A combinator that pulls in a function regardless of one or two variables and outputs the answer.

comb.js

function power(x,y){
  var tmp=x;
  if (y<1){
    return 1;
  }
  else{
    for(var i=0;i<y-1;i++){
      tmp=tmp*x;
    }
    return tmp;
  }
}


function comb(fn){
  return function(y){
    if(arguments.length>1){
      return fn(arguments[0],arguments[1]);
    }
    
    else {
      return function(x){
        return fn(x,y);
      };
    }
  };
}

var foo = comb(power);
console.log(foo(2,5));
var bar = foo(5);
console.log(bar(2));