Patch for object.value to provide positive assertion

Question

Patch for object.value to provide positive assertion

Initially, I set out to create a function that would determine whether my data object contained a truthy value and return a boolean accordingly.

The specific key or value that is truthy is not important to me; all that matters is the presence of a truthy value within the data.

var fruits = { apples: false, oranges: true, bananas: true }

Upon iterating over this object, the expected return should be true as there are indeed true values present.

While the following function successfully achieved the desired outcome:

return Object.values(fruits).some(function(k) {
    return k;
});

I faced compatibility issues with IE which prevented me from using Object.value or array.some.

A suggested Polyfill recommended using .map in order to access each value individually. However, eliminating .some() proved to be a challenge. I experimented with .filter(), but it led me back to square one where it returned the truthy key instead of just verifying the presence of any truthy value in the dataset.

javascript object ecmascript-5

Answer 1

Answer №1

If you find yourself in need of traditional JavaScript, opt for a simple for loop:

function hasTruthyValues(arr) {
    for (let item in arr) {
        if (arr.hasOwnProperty(item) && arr[item]) return true;
    }
    return false;
}

Answer 2

If you find yourself in need of traditional JavaScript, opt for a simple for loop:

function hasTruthyValues(arr) {
    for (let item in arr) {
        if (arr.hasOwnProperty(item) && arr[item]) return true;
    }
    return false;
}

Answer 3

Answer №2

You actually don't require that `hasOwnProperty` check.

var items = {
  shirts: true,
  pants: false,
  shoes: true
}


function hasTrueValue(object) {
  for (let property in object) {
    if (object[property]) {
      return true;
    }
  }
}

console.log(hasTrueValue(items)); //true

Answer 4

You actually don't require that `hasOwnProperty` check.

var items = {
  shirts: true,
  pants: false,
  shoes: true
}


function hasTrueValue(object) {
  for (let property in object) {
    if (object[property]) {
      return true;
    }
  }
}

console.log(hasTrueValue(items)); //true

Patch for object.value to provide positive assertion

Answer №1

Answer №2

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