check the value of the of the loop you are on

Question

I have a foreach loop for an array, with an index to tell me which loop i am on, and an item to tell me the value of the loop i am on. Probably an obvious answer, but I'd like to be able to get the item from the index. How might i do this?

const bar1beats = [1, 0.5, 0.5, 2]

bar1beats.forEach(foreachfunction);

function foreachfunction(item, index1){

checkitemof(index1 - 1)

}

Answer 1

The forEach function callback can accept three arguments - the item, the index, and the array itself.

function foreachfunction(item, index1, theArray){
    if (index1 > 0) {
        const previousItem = theArray[index1 - 1];
        ...
    }
}