How to check if Javascript array of objects has the same value throughout

Question

I have the following array:
distributors = [{ Name: 'Foo', Count: 0}, { Name: 'Bar', Count: 0}, { Name: 'Baz', Count: 0}]

How do I check if the 'Count' is 0 for every object in the array? Ideally, I would like to write a function to return boolean if the value for 'Count' is 0 for every object in the array.

if count is 0 for every object, should the function return true? — Simon
– Simon, Commented Oct 26, 2020 at 15:50
What have you tried? Best to provide your attempts and say where you're getting stuck rather than simply ask for the answer. Especially since this looks like it might be a homework assignment. — Marc
– Marc, Commented Oct 26, 2020 at 15:52

phi-rakib · Accepted Answer · 2020-10-26 15:54:07Z

6

You can use every method. Every method checks if all elements in an array pass a test and returns true or false based on the function you have provided. So, If every element pass the test it returns true otherwise false.

const distributors = [
  { Name: 'Foo', Count: 0 },
  { Name: 'Bar', Count: 0 },
  { Name: 'Baz', Count: 0 },
];

const ret = distributors.every((x) => x.Count === 0);
console.log(ret);

answered Oct 26, 2020 at 15:54

phi-rakib

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Comments

Simon · Accepted Answer · 2020-10-26 15:57:03Z

0

This function returns true if all the Count property is 0

function checkCount(distributors) {
    for (let element of distributors) {
        if (element.Count) {
            return false;
        }
    }

    return true;
}

answered Oct 26, 2020 at 15:57

Simon

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