extract elements from dataset

Attempting to splice an array but encountering index issues

var kode_pelayanan = [];
function deleteKodePelayanan(index){
    kode_pelayanan.splice(index, 1);
    console.log(kode_pelayanan);
}

Experimented in the console with an array for kode_pelayanan. This array is obtained from input.

kode_pelayanan array ["LB1", "LB2", "LHA01", "LHA02"]

However, upon executing the deleteKodePelayanan() function and attempting to splice LB2, the resulting value is:

["LB2", "LHA01", "LHA02"]

Answer №1

Prior to using the splice method, it's a good idea to perform some validation on the index.

function removeServiceCode(index){
  index = parseInt(index,10);
  if (isNaN(index)) {
    // index is not a valid number
    return;
  } else if (!(index in service_codes)) {
    // index is a number but the value isn't present
    return;
  }
  service_codes.splice(index, 1);
}

Answer №2

If you're looking to remove an element from an array based on its value rather than index, there are two simple steps to follow. First, use the indexOf method to find the index of the element. Then, utilize the splice method to delete it from the array.

Here's an example using JavaScript:

var fruits = ["apple", "banana", "orange", "grape"];

function removeFruit(fruit){
    var index = fruits.indexOf(fruit);
    if (index !== -1) {
      fruits.splice(index, 1);
    }
    console.log(fruits);
}

removeFruit("banana"); // => ["apple", "orange", "grape"]

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