Remove elements from array javascript

Question

I am trying to delete/remove an element from a date array. However, for some reason the last element is not being removed. I will give an example below:

I have a date array like arr[1900-12-20, 1898-12-20, 1900-12-20]; Please consider the elements in the array are dates and not strings.

Here is my code - My code take in an array of dates(input1[0]), one date attribute like '2014-09-30' (input1[1]), and returns an array of dates(output1)

var DobArr = input1[0];
var passedInDt = input1[1];
var prt_year = 0;
var ageInYears = 0;

//Get year for valuation date
valYear = passedInDt.getFullYear();

for (i=0; i<DobArr.length; i++){

    prt_year = DobArr[i].getFullYear();
    ageInYears = valYear - prt_year;

    if (ageInYears >= 110){
    removeByIndex(DobArr, i);
 }
}
output1 = DobArr;

function removeByIndex(arr, index) {
  arr.splice(index, 1);
}

So what the code does is checks if ageInYears >= 110, if it is then I would like to remove the element from array.

Let me give a side note here, an Oracle product will call this script, and input1[0] is an array of date elements. input1[0] in Oracle product looks like input1[0] = {1900-12-20}{1898-12-20}{1900-12-20}

After running my code, DobArr should be empty, instead it has a value of {1898-12-20} ... Why ?? All elements pass ageInYears >= 110, why do i have an element left ? i am confused. splice function should remove the elements completely from the array. Please Help and thanks in advance.

Thanks,

Answer 1

after removing an element by index - all indexes are shifting in 1 place... repeat that for several times and you will find that the loop index (in that case i) is moving by the old index count while the current index count already changes. so all you need to do is update i variable:

if (ageInYears >= 110)
{
    removeByIndex(DobArr, i); i--;
}

Answer 2

First thing Search element which you want to delete:

var numArray = [2,3,5,6];
var index = numArray.indexOf(5);;

Now; use splice() method:

if (index > -1) {
 array.splice(index, 1);
}

Answer 3

The splice method returns an array, so you would have to return arr.splice(index, 1) and reassign DobArr to removeByIndex(DobArr, i).