As indicated in the question (maybe not properly formulated) I am trying to get the index of an array for which the difference between each of its element and the index-corresponding element of the second array is < 0. Maybe the code below will explain more what I am trying to obtain. I succeded to get the desired indexes using flatMap() function but could get it using the filter() filter which I think is more appropriate in this case (always getting here the element but not the index)
let array1 = ['524', '587', '034', '816', '65', '7']
let array2 = ['3', '0', '33', '4', '193', '13']
function getSumOfArrays(array1, array2){
let sumArray = array1.map((elem,idx)=>parseFloat(elem) - parseFloat(array2[idx]))
return sumArray
}
function getIdxNegativeDiff1(array1, array2){ //this function works
let negatifIdx1 = array1.flatMap((elem,idx)=>{return parseFloat(elem)-parseFloat(array2[idx]) < 0 ? idx : [] })
return negatifIdx1
}
function getIdxNegativeDiff2(array1, array2){
let negatifIdx2 = array1.filter((elem,idx)=>{ return (parseFloat(elem)-parseFloat(array2[idx]) < 0 ? idx : '')})
return negatifIdx2
}
console.log(array1)
console.log(array2)
console.log(getSumOfArrays(array1, array2))
console.log(getIdxNegativeDiff1(array1, array2))
console.log(getIdxNegativeDiff2(array1, array2))Tried many possibilities but could not reach the solution with filter. Could someone with the solution
