Question 392629 in Javascript Question posted in
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Javascript – get total of empty values in an object

please I need help with this

const obj = {a="", b="good", c=false, d="", e="excellent"}

I just want to know total empty and false. where my answer is suppose to be 3.

const obj = {a="", b="good", c=false, d="", e="excellent"}

for (let k in obj) {
  if (obj[k] === '' || obj[k] === false) {
    //console.log(k);

  }
}

Any pointers will be greatly appreciated

THank you

Tags:

4

Answers


  1. 0

    You could just make an array and put the keys that are empty into it. That way, at the end of the program, the length of the array will be the number of empty elements.

    const obj = {a:"", b:"good", c:false, d:"", e:"excellent"}
const emptyElements = [] // an array containing all the keys of the properties that are empty
for (let key in obj) {
  if (obj[key] === '' || obj[key] === false) {
    // Key is empty
    emptyElements.push(k)
  }
}
console.log(emptyElements.length) // the number of empty elements in the object

    Or you could simply add a variable that increments whenever it finds an empty value.

    const obj = {a:"", b:"good", c:false, d:"", e:"excellent"}
let nEmptyElements = 0 // Number of empty elements
for (let key in obj) {
  if (obj[key] === '' || obj[key] === false) {
    // Key is empty
    nEmptyElements += 1 // Increment the number of empty element
  }
}
console.log(nEmptyElements) // the number of empty elements in the object

    Hope this helps

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  2. 0 
    const obj = {a:"", b:"good", c:false, d:"", e:"excellent"};

let count = 0; 

for (let k in obj) {
  if (obj[k] === '' || obj[k] === false) {
    count++; 
  }
}

console.log(count);
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  3. 0

    You can reduce over Object.values.

    const obj = {a: "", b: "good", c: false, d: "", e: "excellent"};
let falsyValuesCount = Object.values(obj).reduce((a, c) => a + !c, 0);
console.log(falsyValuesCount);

    To get the actual values that were falsy, use Array#filter instead.

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  4. 0

    Here’s a one liner to archieve your result set using Array.Prototype.filter :

    const obj = {a: "", b: "good", c: false, d: "", e: "excellent"};

const resultArray = Object.values(obj).filter(value => value === '' || value === false);

console.log("Count :", resultArray.length); 
console.log("Array values :", JSON.stringify(resultArray));

    Read more on Array.Prototype.filter operation here

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