Review Callbacks

review_callbacks.js

//callbacks
var counter = 0;
var english = ["zero","one","two","three"];

function increase( cb ){
  
  counter = counter + 1;
  
  var counter_in_english = english[counter];
  
  cb( counter_in_english );
  
}

increase( function( english_word ){
  console.log( english_word );
} );

increase( function( english_word ){
  console.log( english_word );
} );

increase( function( english_word ){
  console.log( english_word );
} );

// multiple callbacks
var counter = 0;
var english = ["zero","one","two","three"];

function increase( success_cb, fail_cb ){
  
  counter = counter + 1;
  
  var counter_in_english = english[counter];
  
  if( counter % 2 == 0 ){
    even_cb( counter_in_english );
  }else{
    odd_cb( counter_in_english );
  }
  
}

increase( function( english_word ){
  console.log( "EVEN", english_word );
}, function( english_word ){
  console.log( "ODD", english_word );
} );

increase( function( english_word ){
  console.log( "EVEN", english_word );
}, function( english_word ){
  console.log( "ODD", english_word );
} );

increase( function( english_word ){
  console.log( "EVEN", english_word );
}, function( english_word ){
  console.log( "ODD", english_word );
} );

// another example

var counter = 0;
var english = ["zero","one","two","three"];

function increase( cb ){
  
  counter = counter + 1;
  
  var counter_in_english = english[counter];
  
  cb( counter_in_english );
  
}

increase( function( english_word ){
  console.log( english_word );
} );

increase( function(  ){
  console.log( "lloose" );
} );

increase( function( english_word ){
  console.log( english_word );
} );

// milk example

var milk = 2;

function getMilkFromStore( action ){
  
  milk = milk - 1;
  
  var hadMilk = milk > -1 ;
  var brand = "moo moo milk";
  
  action( hadMilk );
  
}

function afterGettingMilk( hadMilk ){
  
  if( hadMilk ){
    console.log('drink some milk');
  }else{
    console.log('sad face');
  }
  
}

getMilkFromStore( afterGettingMilk ); // true
getMilkFromStore( afterGettingMilk ); // true
getMilkFromStore( afterGettingMilk ); // false

// ray's milk example

var groceryStore = {
  Fruit: ["Apple", "Bananas", "Oranges"],
  Milk: ["Low-Fat", "Skim", "Whole Milk"],
  Candy: ["Goodbar", "Reese's pieces", "Sour Patch Kids"]
};

function goTo(location, aisle, callback){
  for (var thisAisle in location) {
    if (thisAisle === aisle) {
      location[thisAisle].forEach(function(item){
        var result = callback(item);
        if (result === true) {
          console.log("I found the " + item + " " + aisle);
        }
      });
    }
  }
}



goTo(groceryStore, "Milk", skimMilk);



function skimMilk () {
  if (type === "Skim") {
    return true;
  }
  return false;
}

function sourPatchKids() {
  if (type === "Sour Patch Kids") {
    return true;
  }
  return false;
}