Question

I have one array of strings. I need to find all strings starting with a key.
for eg: if there is an array ['apple','ape','open','soap']
when searched with a key ‘ap’
i should get ‘apple’ and ‘ape’ only and not ‘soap’.

This is in javascript.

Answer 1

function find(key, array) {
  // The variable results needs var in this case (without 'var' a global variable is created)
  var results = [];
  for (var i = 0; i < array.length; i++) {
    if (array[i].indexOf(key) == 0) {
      results.push(array[i]);
    }
  }
  return results;
}