관리-도구
편집 파일: deep-map.js
const deepMap = (input, handler = v => v, path = ['$'], seen = new Set([input])) => { if (Array.isArray(input)) { const result = [] for (let i = 0; i < input.length; i++) { const element = input[i] const elementPath = [...path, i] if (element instanceof Object) { if (!seen.has(element)) { // avoid getting stuck in circular reference seen.add(element) result.push(deepMap(handler(element, elementPath), handler, elementPath, seen)) } } else { result.push(handler(element, elementPath)) } } return result } if (input === null) { return null } else if (typeof input === 'object' || typeof input === 'function') { const result = {} if (input instanceof Error) { // `name` property is not included in `Object.getOwnPropertyNames(error)` result.errorType = input.name } for (const propertyName of Object.getOwnPropertyNames(input)) { // skip logging internal properties if (propertyName.startsWith('_')) { continue } try { const property = input[propertyName] const propertyPath = [...path, propertyName] if (property instanceof Object) { if (!seen.has(property)) { // avoid getting stuck in circular reference seen.add(property) result[propertyName] = deepMap( handler(property, propertyPath), handler, propertyPath, seen ) } } else { result[propertyName] = handler(property, propertyPath) } } catch (err) { // a getter may throw an error result[propertyName] = `[error getting value: ${err.message}]` } } return result } return handler(input, path) } module.exports = { deepMap }