JavaScript: apply versus call // source http://jsbin.com/nejufu/4

apply_call.js

// apply versus call


// apply passes the array as a set of arguments to the function

function splat(fun) {
  console.log('splat');
  return function(array) {
    console.log("fun.apply");
    return fun.apply(null, array);
  };
  
}


var numbers = [3,4];

var addIt = splat(function(x,y) { 
  console.log('addIt');
  return x + y;

});

console.log(addIt(numbers));

// call passes the array as 1 argument
function printAll(fun) {
  console.log('printAll');
  return function() {
    console.log("fun.call ...");
    return  fun.call(null, Array.prototype.slice.call(arguments));
    
  };
  
}

var joinIt = printAll(function(array){
  console.log('joinIt');
  return array.join(' ');
});

var stuff = ['apple','orange','pear'];

console.log(joinIt(stuff));