Filtering array A based on whether it contains any or partial elements from array B-CodePudding

I have two arrays, array A has a list of elements that may or may not contains an element from array B. I want to filter array A so that it only contains elements where it contains at least one element from array B.

const a = [
  'cqAWS1x2', 
  'cqAM1c',
  'cqA10a   cqA10b',
  'cqA10axZAF   cqA10bxZAF']

const b = [
  'cqAWS1x2',
  'cqA10a',
  'cqA10axZAF']

I want to filter a so it'll be

 ['cqAWS1x2',
  'cqA10a   cqA10b',
  'cqA10axZAF   cqA10bxZAF']

'cqAWS1x2' because Array b contains that element, 'cqA10a cqA10b' because b contains 'cqA10a' which is part of 'cqA10a cqA10b'. Same for 'cqA10axZAF cqA10bxZAF', because b contains 'cqA10axZAF'.

This is what I have so far:

a.filter(avc => b.some(bvc => bvc.includes(avc)))

In the result, I get only ['cqAWS1x2'] but not 'cqA10a cqA10b' and 'cqA10axZAF cqA10bxZAF'.

Thanks for all the help!

CodePudding user response：

You just need to switch the avc and bvc in your includes() call (avc is the longer string, check if it includes the shorter bvc).

const a = ['cqAWS1x2', 'cqAM1c', 'cqA10a   cqA10b', 'cqA10axZAF   cqA10bxZAF'];
const b = ['cqAWS1x2', 'cqA10a', 'cqA10axZAF'];

console.log(a.filter((avc) => b.some((bvc) => avc.includes(bvc))));