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Flatten a nested array of objects
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const data = [ | |
{ | |
id: 251, | |
name: 'Top level 1', | |
parentId: null, | |
children: [ | |
{ | |
id: 253, | |
parentId: 251, | |
name: 'Inner level 1-1', | |
children: [ | |
{ | |
id: 456, | |
parentId: 253, | |
name: 'Inner level 1-1-1', | |
children: [] | |
} | |
] | |
} | |
] | |
}, | |
{ | |
id: 252, | |
name: 'Top level 2', | |
parentId: null, | |
children: [ | |
{ | |
id: 254, | |
parentId: 252, | |
name: 'Inner level 2-1', | |
children: [] | |
}, | |
{ | |
id: 255, | |
parentId: 252, | |
name: 'Inner level 2-2', | |
children: [] | |
}, | |
{ | |
id: 256, | |
parentId: 252, | |
name: 'Inner level 2-3', | |
children: [] | |
}, | |
{ | |
id: 257, | |
parentId: 252, | |
name: 'Inner level 2-4', | |
children: [ | |
{ | |
id: 258, | |
parentId: 257, | |
name: 'Inner level 2-4-1', | |
children: [] | |
} | |
] | |
} | |
] | |
} | |
]; | |
function flattenArrayOfObjects(data) { | |
const final = []; | |
function walk(children) { | |
if (!children.length) return; | |
children.forEach(({ children, ...rest }) => { | |
final.push({ ...rest }); | |
if (children.length) { | |
return walk(children); | |
} | |
}); | |
} | |
walk(data || []); | |
return final; | |
} | |
const d = flattenArrayOfObjects(data); | |
console.log(JSON.stringify(d, null, 2)); |
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