Unflatten an object with the paths for keys.
Use Object.keys(obj)
combined with Array.prototype.reduce()
to convert flattened path node to a leaf node.
If the value of a key contains a dot delimiter (.
), use Array.prototype.split('.')
, string transformations and JSON.parse()
to create an object, then Object.assign()
to create the leaf node.
Otherwise, add the appropriate key-value pair to the accumulator object.
代码片段
const unflattenObject = obj =>
Object.keys(obj).reduce((acc, k) => {
if (k.indexOf('.') !== -1) {
const keys = k.split('.');
Object.assign(
acc,
JSON.parse(
'{' +
keys.map((v, i) => (i !== keys.length - 1 ? `"${v}":{` : `"${v}":`)).join('') +
obj[k] +
'}'.repeat(keys.length)
)
);
} else acc[k] = obj[k];
return acc;
}, {});
使用样例
unflattenObject({ 'a.b.c': 1, d: 1 }); // { a: { b: { c: 1 } }, d: 1 }