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June 16, 2021 16:42
Examples of Set Theory from https://medium.com/@alvaro.saburido/set-theory-for-arrays-in-es6-eb2f20a61848
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// Examples of https://medium.com/@alvaro.saburido/set-theory-for-arrays-in-es6-eb2f20a61848 | |
const arrA = [1, 3, 4, 5]; | |
const arrB = [1, 2, 5, 6, 7]; | |
const intersection = arrA.filter((x) => arrB.includes(x)); | |
console.log('Intersection: ', intersection); | |
console.log('Expected: [1,5]'); | |
const difference = arrA.filter((x) => !arrB.includes(x)); | |
console.log('\nDifference: ', difference); | |
console.log('Expected: [3,4]'); | |
const symmetricalDifference = arrA | |
.filter((x) => !arrB.includes(x)) | |
.concat(arrB.filter((x) => !arrA.includes(x))); | |
console.log('\nSymmetrical Difference: ', symmetricalDifference); | |
console.log('Expected: [2,3,4,6,7]'); | |
const union = [...new Set([...arrA, ...arrB])]; | |
console.log('\nUnion: ', union); | |
console.log('Expected: [1,2,3,4,5,6,7]'); |
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