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Filter an array of shallow objects by repeating and non-repeating objects in javascript
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const objectList = [ | |
{ id: 1, console: 'playstation 4' }, | |
{ id: 2, console: 'xbox one s' }, | |
{ id: 2, console: 'xbox one s' }, | |
{ id: 1, console: 'playstation 4' }, | |
{ id: 1, console: 'playstation 4' }, | |
{ id: 1, console: 'playstation 2' }, | |
{ id: 3, console: 'playstation 1' } | |
] | |
let filteredByRepetition = [] | |
const filteredByNoRepetition = | |
objectList.reduce((acc, current) => { | |
const isAlreadyIn = acc.find( | |
obj => JSON.stringify(obj) === JSON.stringify(current) | |
) | |
if (isAlreadyIn) { | |
filteredByRepetition.push(isAlreadyIn) | |
return acc | |
} | |
return [...acc, current] | |
}, []) | |
console.log({ | |
filteredByRepetition, | |
filteredByNoRepetition | |
}) | |
/* | |
filteredByRepetition: Array[3] | |
0: Object | |
id: 2 | |
console: "xbox one s" | |
1: Object | |
id: 1 | |
console: "playstation 4" | |
2: Object | |
id: 1 | |
console: "playstation 4" | |
filteredByNoRepetition: Array[4] | |
0: Object | |
id: 1 | |
console: "playstation 4" | |
1: Object | |
id: 2 | |
console: "xbox one s" | |
2: Object | |
id: 1 | |
console: "playstation 2" | |
3: Object | |
id: 3 | |
console: "playstation 1" | |
*/ |
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