Remove Characters from All Keys in an Object (Lodash OK)

Question

I have a bothersome length of characters before all keys in this object. Since they are all the same, I would like to do a .map() or forEach() or some

Answer 1

Another approach that avoinds the need for Object.fromEntries(), would be to use Array.reduce() as shown:

const input = {
  'remove.this.string.a': "apple",
  'remove.this.string.b': "banana",
  'remove.this.string.c': "carrot",
  'remove.this.string.d': "diakon"
};

const output = Object.entries(input).reduce((result, [key, value]) => {
  
  /* Pluck last letter of key string */
  const letter = key.slice(-1);

  /* Insert letter key/value into result object */
  return { ...result, [letter] : value };
  
}, {});

console.log(output);