Created
July 24, 2020 03:18
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Flatten Object
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const data = ['foo', 'bar', 'baz']; | |
const data2 = { | |
foo: { | |
bar: 123, | |
baz: [ | |
{ title: 'foo', value: 'bar' }, | |
{ title: 'a', value: 'a' }, | |
{ title: 'b', value: 'b' }, | |
], | |
}, | |
movies: [ | |
{ title: 'Test', date: 1234, value: 'foo' }, | |
{ title: 'Test2', value: 'test2' }, | |
{ title: 'Test3', value: 'test3' }, | |
{ title: 'Test4', value: 'test4' }, | |
], | |
}; | |
const shapedValue = [ | |
{ id: 'foo', title: 'foo', type: 'object', level: 0 }, | |
{ id: 'foo.bar', title: 'bar', type: 'number', value: '123', level: 1 }, | |
// | |
{ id: 'foo.baz', title: 'baz', type: 'array', level: 1 }, | |
// | |
{ id: 'foo.baz[0]', title: '0', type: 'object', level: 2 }, | |
{ id: 'foo.baz[0].title', title: 'title', value: 'foo', level: 3 }, | |
{ id: 'foo.baz[0].value', title: 'value', value: 'bar', level: 3 }, | |
/// | |
{ id: 'foo.baz[1]', title: '1', type: 'object', level: 2 }, | |
{ id: 'foo.baz[1].title', title: 'a', value: 'a', level: 3 }, | |
{ id: 'foo.baz[1].value', title: 'a', value: 'a', level: 3 }, | |
]; | |
// data2.foo.baz[0].value | |
const flattenObject = (obj, key = '', level = 0, parentArray = false, position = []) => | |
Object.entries(obj).reduce((acc, curr, i) => { | |
const [nodeKey, value] = curr; | |
const nodeType = typeof value; | |
const isObject = nodeType === 'object'; | |
const id = parentArray | |
? `${key}[${nodeKey}]` | |
: key | |
? `${key}.${nodeKey}` | |
: nodeKey; | |
const pos = [...position, i] | |
const line = { id, title: nodeKey, type: nodeType, level, pos }; | |
if (!isObject) line.value = value; | |
acc.push(line); | |
if (isObject) { | |
const isArray = Array.isArray(value); | |
const children = flattenObject(value, id, level + 1, isArray, pos); | |
acc = [...acc, ...children]; | |
} | |
return acc; | |
}, []); | |
flattenObject(data2); |
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