Can you iterate through each element that matches those in a different array?

Question

Can you iterate through each element that matches those in a different array?

As a beginner in Javascript, I may stumble upon some obvious errors, so please bear with me.

My goal is to iterate through two arrays and perform a loop for each element that exists in both arrays. Currently, this is my code:

if(obtainedCards.some( sp => Boosters.SP.includes(sp)))
{
    obtainedCards.forEach(potential => Boosters.SP.includes(potential))
    {
        // MODIFY THIS TO 0, 100 POST TESTING
        this.chance = CardsBetween(76, 100);

        console.log(this.chance);
        if(this.chance >= 76)
        {
            this.noOfSPs += 1;
            console.log("Test: " + this.chance);
        }
    };

    console.log("Chance is: " + this.chance);
    console.log("No of SPs is: " + this.noOfSPs);

   //return chance, 
   return noOfSPs;
}

The initial if statement functions correctly, but the forEach does not. It only runs through once even when there are multiple common elements between the arrays.

javascript arrays foreach

Answer 1

Answer №1

To begin, eliminate all elements from the first array that are not found in the second array. After filtering, the resulting array is the one you want to iterate over.

const array_1 = [1, 2, 3];
const array_2 = [4, 5, 2];

const getArrayWithCommonElements = (arr1, arr2) => {
    return arr1.filter(item => arr2.includes(item));
}

getArrayWithCommonElements(array_1, array_2).map(item => console.log(item)) // This code will iterate through each item in array 1 that matches an element in array 2

Answer 2

To begin, eliminate all elements from the first array that are not found in the second array. After filtering, the resulting array is the one you want to iterate over.

const array_1 = [1, 2, 3];
const array_2 = [4, 5, 2];

const getArrayWithCommonElements = (arr1, arr2) => {
    return arr1.filter(item => arr2.includes(item));
}

getArrayWithCommonElements(array_1, array_2).map(item => console.log(item)) // This code will iterate through each item in array 1 that matches an element in array 2

Can you iterate through each element that matches those in a different array?

Answer №1

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