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deep clone
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| const fromObj = (source = {}) => Object.keys(source).map(k => source[k]) | |
| const k = { | |
| a: 1 | |
| } | |
| const data = { | |
| start: k, | |
| a: [], | |
| b: [1, 2, 3], | |
| c: [{ foo: 'bar' }], | |
| d: {}, | |
| e: { a: 'a', b: 'b', c: 'c', d: ['a', 'b', 'c', {a: 'a', b: 'b'}] }, | |
| f: 1, | |
| g: true, | |
| h: { | |
| k | |
| }, | |
| i: { | |
| k | |
| } | |
| } | |
| const deepClone = (obj, visited = [], visitedClones = []) => { | |
| let clone | |
| // let isObj = typeof obj === 'object' | |
| let isPlainObject = Object.prototype.toString.call(obj) === '[object Object]' | |
| let isArray = Array.isArray(obj) | |
| let vIndex = visited.indexOf(obj) | |
| if (vIndex > -1) { | |
| clone = visitedClones[vIndex] | |
| } else { | |
| if (isArray) { | |
| clone = [] | |
| obj.forEach( | |
| (v, i) => (clone[i] = deepClone(v, visited, visitedClones)) | |
| ) | |
| } else if (isPlainObject) { | |
| clone = {} | |
| Object.keys(obj).forEach( | |
| key => (clone[key] = deepClone(obj[key], visited, visitedClones)) | |
| ) | |
| } else { | |
| clone = obj | |
| } | |
| } | |
| if ( (vIndex < 0) && (isArray || isPlainObject) ) { | |
| let i = visited.push(obj) | |
| console.log(visited, 'visited') | |
| visitedClones[i - 1] = (clone) | |
| console.log(visitedClones, 'visitedClones') | |
| } | |
| return clone | |
| } | |
| let cloned = deepClone(data); | |
| console.dir(cloned) | |
| console.log(data.c[0] !== cloned.c[0]) | |
| console.log(data.e.d !== cloned.e.d) | |
| console.log(data.e.d[3] !== cloned.e.d[3]) | |
| console.log(data.i.k !== cloned.i.k) | |
| console.log(cloned.h.k === cloned.i.k, cloned.start === cloned.h.k, 'Duplicate reference') | |
| let shallowCloned = deepmerge({}, data, {clone: false}) | |
| console.log(data.e.d[3] === shallowCloned.e.d[3], 'deepmerge shallowCloned') | |
| let deepCloned = deepmerge({}, data) | |
| console.log(data.e.d[3] !== deepCloned.e.d[3], 'deepmerge') |
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>GistRun</title> | |
| <link rel="stylesheet" href="styles.css"> | |
| </head> | |
| <body> | |
| <h1></h1> | |
| <script src="https://unpkg.com/[email protected]/dist/umd.js"></script> | |
| <script src="a.js"></script> | |
| </body> | |
| </html> |
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| /* todo: add styles */ |
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