Cacher is the code snippet organizer for pro developers

// Immutable array
//add new item
const newCharacters = [ ...characters, 'Luke' ];
// Removing Vader
const withoutVader = characters.filter(char => char !== 'Vader');
// Changing Vader to Anakin
const backInTime = characters.map(char => char === 'Vader' ? 'Anakin' : char);
// Merging two character sets
const moreCharacters = [ ...characters, ...otherCharacters ];

// All characters uppercase
const shoutOut = characters.map(char => char.toUpperCase());
// sort
const sortedCharacters = characters.slice().sort();

// Immutable objects
// add new item and merge of items
const newPerson = {
  ...person,
  age: 30
};

// delete item
const newPerson = Object.keys(person).reduce((obj, key) => {
  if (key !== property) {
    return { ...obj, [key]: person[key] }
  }
  return obj
}, {});