Question 228063 in Javascript Question posted in
A very good W3school tutorial can be found here.

Spllit an array in Javascript for Google Apps Script function

Current result has this:

[
['Cycling','Chess'],
['Cycling','Pilates'],
['Cycling','Elevate'],
['Cycling','Kundalini'],
['Cycling','Scrabble'],
['Cycling','Crossword'],
['Cycling','Darning'],
['Running','Ashtanga'],
['Running','Poker'],
['Running','Sudoku'],
['Running','Sewing'],
['Running','Jump'],
['Boxing','Mushin'],
['Boxing','Tai'],
['Boxing','Tae'],
['Boxing','1000'],
['Boxing','Transient'],
['Boxing','Walking'],
['Strength','Flow'],
['Strength','Tantric'],
['Strength','Quigong'],
['Strength','Active']
]

Split the array so that only the following remains:

['Chess'],
['Pilates'],
['Elevate'],
['Kundalini'],
['Scrabble'],
['Crossword'],
['Darning'],
['Ashtanga'],
['Poker'],
['Sudoku'],
['Sewing'],
['Jump'],
['Mushin'],
['Tai'],
['Tae'],
['1000'],
['Transient'],
['Walking'],
['Flow'],
['Tantric'],
['Quigong'],
['Active']

Split only appears to work on 1 dimension arrays so I’m looking for an alternative. Numpty has an hsplit function but unable to find an equivalent for Javascript. Thanks

Tags:

3

Answers


  1. 0

    Use map: arr.map(subarr => [subarr[1]]), though I don’t see why you want one-element lists. arr.map(subarr => subarr[1]), producing a list of strings, is probably more useful.

    const arr = [
  ['Cycling','Chess'],
  ['Cycling','Pilates'],
  ['Cycling','Elevate'],
  ['Cycling','Kundalini'],
  ['Cycling','Scrabble'],
  ['Cycling','Crossword'],
  ['Cycling','Darning'],
  ['Running','Ashtanga'],
  ['Running','Poker'],
  ['Running','Sudoku'],
  ['Running','Sewing'],
  ['Running','Jump'],
  ['Boxing','Mushin'],
  ['Boxing','Tai'],
  ['Boxing','Tae'],
  ['Boxing','1000'],
  ['Boxing','Transient'],
  ['Boxing','Walking'],
  ['Strength','Flow'],
  ['Strength','Tantric'],
  ['Strength','Quigong'],
  ['Strength','Active']
];
console.log(arr.map(subarr => [subarr[1]]));
    Login or Signup to reply.
  2. 0

    you can use the map method, here’s sample code:

    const arr = [
['Cycling','Chess'],
['Cycling','Pilates'],
['Cycling','Elevate'],
['Cycling','Kundalini'],
['Cycling','Scrabble'],
['Cycling','Crossword'],
['Cycling','Darning'],
['Running','Ashtanga'],
['Running','Poker'],
['Running','Sudoku'],
['Running','Sewing'],
['Running','Jump'],
['Boxing','Mushin'],
['Boxing','Tai'],
['Boxing','Tae'],
['Boxing','1000'],
['Boxing','Transient'],
['Boxing','Walking'],
['Strength','Flow'],
['Strength','Tantric'],
['Strength','Quigong'],
['Strength','Active']
];

const new_arr = arr.map( element => {
return [element[1]];
});

console.log(new_arr);
    Login or Signup to reply.
  3. 0

    You can use reduce to create a dictionary, so you "deduplicate" data on the same iteration. This code only works for arrays with 2 items. You can easily iterate over that array so you can use it with arrays of any size

    var arr = [
['Cycling','Chess'],
['Cycling','Pilates'],
['Cycling','Elevate'],
['Cycling','Kundalini'],
['Cycling','Scrabble'],
['Cycling','Crossword'],
['Cycling','Darning'],
['Running','Ashtanga'],
['Running','Poker'],
['Running','Sudoku'],
['Running','Sewing'],
['Running','Jump'],
['Boxing','Mushin'],
['Boxing','Tai'],
['Boxing','Tae'],
['Boxing','1000'],
['Boxing','Transient'],
['Boxing','Walking'],
['Strength','Flow'],
['Strength','Tantric'],
['Strength','Quigong'],
['Strength','Active']
]

const data = Object.keys(arr.reduce((prev, act) => {
  prev[act[0]] = 1
  prev[act[1]] = 1
  return prev
}, {}))

console.log(data)
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search