How to count the keys of an object that have a specific field value?

• 0
  There is a Permissions object in which the key fields are "True" or "False".
  We need to make a function that counts keys whose value is "True".
  I tried using Object.values ​​() (although it seems to me that I should use something else), but it does not count the keys.
  Here's the code itself:
  

  let Permissions = {canView: "True", canEdit: "False", canPrint: "True"};
  function Count() {
    let count = 0;
    for (let count of Object.values(Permissions)) {
      if (Permissions == "True")
      count++;
    }
    alert(count);
  }

  JavaScript Henry Wilcox, Dec 24, 2019

---

2 Answers
• 0

  let Permissions = {canView: "True", canEdit: "False", canPrint: "True"};
  
  
  
  function countTrueKeys(obj) {
  
    let count = 0
  
    for(let key in obj) {
  
      if (obj[key] == 'True') {
  
        count ++
  
      }
  
    }
  
    return count
  
  }
  
  
  
  console.log(countTrueKeys(Permissions)) // 2

  Anonymous

---

• 0
  Your code is just a champion in the number of absurdities, you use count both as a counter and as a variable during iteration, you compare the value of the Permissions object with a string for some reason.
  
  
  
  Correct code according to your algorithm:
  
  
  
  

  let Permissions = {canView: "True", canEdit: "False", canPrint: "True"};
  
  function Count() {
  
    let count = 0;
  
    for (let elem of Object.values(Permissions)) {
  
      if (elem === "True") count++;
  
    }
  
    alert(count);
  
  }

  
  
  
  
  But it's easier
  
  
  
  

  const Permissions = {canView: "True", canEdit: "False", canPrint: "True"};
  
  const count = Object.values(Permissions).filter(v => v == "True").length
  
  alert(count)

  
  
  
  
  And it is customary to write variables in js with a small letter (fig knows why, I like the Microsoft style more, but it is accepted this way)

  Claire Matthews

---