Split one array in two arrays with react native

Question

I would like to split an array into two arrays (one for letters and the other for frequencies).

var list = [ "ES 324798", "LE 237076", "EN 231193" ]

This is the array that I want to split.

I would like to get an array with all letters like this :

var letters = [ "ES", "LE", "EN" ]

And an other with numbers :

var numbers = [ "324798", "237076", "231193" ]

I searched for "how to split one array in two arrays with React native" but I don't find what I want. I tried with split and splice functions but it didn't help me (or I just don't know how to use them properly).

Can you give me some tips ?

norbitrial · Accepted Answer · 2020-03-21 15:08:17Z

3

One possible solution could be using .reduce() and .split().

Try the following:

const list = [ "ES 324798", "LE 237076", "EN 231193" ];

const result = list.reduce((a, c) => {
  const split = c.split(' ');
  a.letters.push(split[0]);
  a.numbers.push(split[1]);
  return a;
}, { letters: [], numbers: [] });

const { letters, numbers } = result;

console.log('letters', letters);
console.log('numbers', numbers);

I hope this helps!

answered Mar 21, 2020 at 15:08

norbitrial

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1 Comment

Cobra braisé Over a year ago

Why my first element "ES" isn't in the both arrays ?

getBigrams = () => {     List.reduce((a, c) => {       const split = c.split(' ');       this.state.BigramsLetters.push(split[0]);       this.state.BigramsFrequency.push(parseInt(split[1], 10));       return a;     })     console.log('letters', this.state.BigramsLetters);     console.log('numbers', this.state.BigramsFrequency);   }

Randy · Accepted Answer · 2020-03-22 03:59:31Z

1

This is not about React Native.

I would do:

const letters = []
const numbers = []
list.forEach((item) => {
  const [ letter, number ] = item.split(' ')
  letters.push(letter)
  numbers.push(number)
})

edited Mar 22, 2020 at 3:59

answered Mar 21, 2020 at 15:08

Randy

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