creating an array of counts elements in an Array

Question

I am trying to output an array that will give me the values of each count from the arr if the conditions hold true.

Example:

//tasksTypes([1, 2, 4, 2, 10, 3, 1, 4, 5, 4, 9, 8], 1)  [2, 8, 2]

My code:

function tasksTypes(deadlines, day) {
    var list= [];
    var today = 0;
    var upcoming = 0;
    var later = 0;

    for(var i=0; i<deadlines.length; i++){
        if(deadlines[i] <= day){
            today += today
            list.push(today)
            if(deadlines[i] <= day + 7){
                upcoming += upcoming
                list.push(upcoming)
                if(deadlines[i] > day + 7){
                    later += later
                    list.push(later)
                }
            }
        }
    }
    return list
}

What are your conditions? The code is not really helpful in this respect because the middle if condition is always true when executed, and the inner if condition is never true when executed. — trincot
– trincot, Commented Nov 17, 2016 at 22:08
Please learn to end statements with ;. You can get unexpected errors if you don't. — Barmar
– Barmar, Commented Nov 17, 2016 at 22:14
Please expand your description of what the code is supposed to do. — 1983
– 1983, Commented Nov 17, 2016 at 22:56

Ori Drori · Accepted Answer · 2016-11-17 22:32:34Z

1

Reduce the deadlines array to the counts array:

function tasksTypes(deadlines, day) {
  return deadlines.reduce(function(counts, deadline) {
    var index = deadline <= day ? 0 : (deadline <= day + 7 ? 1 : 2);
    
    counts[index]++;
    
    return counts;
  }, [0, 0, 0]);
}

var result = tasksTypes([1, 2, 4, 2, 10, 3, 1, 4, 5, 4, 9, 8], 1);

console.log(result);

answered Nov 17, 2016 at 22:32

Ori Drori

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Comments

IMTheNachoMan · Accepted Answer · 2016-11-17 22:09:33Z

0

I think this is what you're looking for. You just want to count the number of instances each value in deadlines meets a certain criteria based on day.

function tasksTypes(deadlines, day) {
  var today = 0;
  var upcoming = 0;
  var later = 0;
  
  for(var i = 0; i < deadlines.length; ++i) {
    if(deadlines[i] <= day)
        today++;
    else if(deadlines[i] <= day + 7)
        upcoming++;
    else
        later++;
   }
  
  return [today, upcoming, later];
}

console.log(tasksTypes([1, 2, 4, 2, 10, 3, 1, 4, 5, 4, 9, 8], 1));

answered Nov 17, 2016 at 22:09

IMTheNachoMan

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