I don't know what it's called but I need help with it

INTERNECION Disrespectful??? nah bro went to far

Do you understand. it is 12:00 AM I am not dealing with this

Mellow
imma kill two birds with one stone on this
varrience probably has a better way but...

so anyways here how to for loop

for(var i = 0; i < 5; i++){
}

1. the var i = 0 means your making a variable called i which starts at 0
2. the i < 5 means the loop keeps repeating while i is less than 5
3. the i++ means i increases by one every time the loop repeats
   SO, in total, the loop repeats five times.
   now, to incorporate with arrays:
   for(var i = 0; i < array.length; i++){
}
   you'll notice its the same as before, except for part two where it now says i < array.length instead of i < 5
   this means that the for loop repeats array.length times, which means it repeats once for each object/achievement in the array

so now we can go through each achievement in the array by using array[i](the ith object in the array, and since i is changing once for each object in the array, we cover all the objects)
to sum it up you'd need something like this:
var numCompleted = 0;
for(var i = 0; i < achievements.length; i++){
if(achievements[i].completed === true){
numCompleted += 1;
}
}
again, hope this helps and im sure varrience has a better way of doing this but until then your welcome

Mellow possibly... not sure exactly what your trying to do, but i'll give 2 examples to try and answer what your trying to do, the

• first is to add a property that keeps track of that in the object that will update manually, unlike arrays objects don't have a .prototype.length attribute

• second is to encase multiple arrays of objects containing a Boolean on if they have been unlocked
  the two examples will be showcased below for those who want to learn

  var  obj = {
  pro: true,
  noob: false,
  achivements: 1
  total: 15
  }
  // we can then update it at any time a new achievement is unlocked
  var loser = true;
  if(loser && !obj.noob){obj.noob = true; achivements++}
  console.log("you have "+obj.total-obj.achivements+" left keep it up!")
  // the second way is below here which is basically what Ack did
  var accomp = [
  {title: "Ruiner", unlocked: false}
  {title: "Participation Award", unlocked: false}
  {title: "Secret Customer", unlocked: true}
  ];
  // to calculate how many achievements we have left we must iterate through the Array
  function accompLeft(){
  var left = accomp.length; // stores total achievements
  for(var i = 0; i < accomp.length; i++){
  if(accomp[i].unlocked){left--} // here we access an accomp [ index ] and a .property from that index 
  }
  return(left)
  } 

just stop f@cking arguing all the time goddammit
i am not going throught 48 posts >:(

oh hi Varrience

Mellow Well I usually use all caps for emphasis and not for yelling. I mean what will I yell at the screen for? It isn't like it just booted up my i.p. adress from out of nowhere. Haha

alright then. But did you see my explanation about the controversy as well?

Mellow ah i see... well you should be able to grasp my example by putting in into a new project or basically almost any JS interpreter and start playing around with what I've got (make sure you use the 2nd iteration of my example as that one you can run), my 2nd example is basically like Ack's... I don't think its that much more of a stretch of a concept or just go off of what Ack said as well if you plan to learn more on your own, Good Luck!

Mellow well did you format it properly? the way Ack show it is object array and i'll give a smaller demo of what he did that way it should be followable

// This is a DEMO please read comments if your stuck or confused
var accomp = [
  {
    title: "new world", // a title of the achivement optional properties like description can also be added
    unlocked: true // the property to look for if we unlocked the achivement
  }, // , <= is important since this is an array
  {
    title: "pro",
    unlocked: false
  },
  {
    title: "gamer",
    unlocked: true
  }
];
// here we are going to count how many achivements we have left
console.log(accomp.length) // <= this will give us how many achivements we have
var unlocked = 0; // keeps track of the current achivements we have
for (var a = 0; a < accomp.length; a++) { // here we iterate through the array
  if (accomp[a].unlocked === true) { // === true doesn't need to be there if's already look for a boolean outcome
    unlocked += 1; // we add here how many is unlocked
  }
}
// here is something more complex we know how many achivements we unlocked and how many we have,
// but how do we show that as output since "-" statements are illegal in console.log statements
var achivementsLeft = accomp.length - unlocked; // this makes it so no () are needed
console.log("You have " + unlocked + " achivements so far\n There's " + achivementsLeft + " left go get em champ")
// this is how it would be done given that you didn't want to declare a variable for a result
console.log("You have " + unlocked + " achivements so far\n There's " + (accomp.length - unlocked) + " left go get em champ")

yeah none of us can actually understand varriance but just go with whatever he's saying its probably right.