53 lines
1.4 KiB
JavaScript
53 lines
1.4 KiB
JavaScript
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import { isPlainObject } from "../predicate/isPlainObject.mjs";
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//#region src/object/flattenObject.ts
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/**
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* Flattens a nested object into a single level object with delimiter-separated keys.
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*
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* @param {object} object - The object to flatten.
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* @param {string} [options.delimiter='.'] - The delimiter to use between nested keys.
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* @returns {Record<string, any>} - The flattened object.
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*
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* @example
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* const nestedObject = {
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* a: {
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* b: {
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* c: 1
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* }
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* },
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* d: [2, 3]
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* };
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*
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* const flattened = flattenObject(nestedObject);
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* console.log(flattened);
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* // Output:
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* // {
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* // 'a.b.c': 1,
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* // 'd.0': 2,
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* // 'd.1': 3
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* // }
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*/
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function flattenObject(object, { delimiter = "." } = {}) {
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return flattenObjectImpl(object, "", delimiter);
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}
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function flattenObjectImpl(object, prefix, delimiter) {
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const result = {};
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const keys = Object.keys(object);
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for (let i = 0; i < keys.length; i++) {
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const key = keys[i];
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const value = object[key];
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const prefixedKey = prefix ? `${prefix}${delimiter}${key}` : key;
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if (isPlainObject(value) && Object.keys(value).length > 0) {
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Object.assign(result, flattenObjectImpl(value, prefixedKey, delimiter));
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continue;
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}
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if (Array.isArray(value) && value.length > 0) {
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Object.assign(result, flattenObjectImpl(value, prefixedKey, delimiter));
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continue;
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}
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result[prefixedKey] = value;
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}
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return result;
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}
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//#endregion
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export { flattenObject };
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