1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93
|
const tree = [ { id: 1, name: '张三', children: [ { id: 2, name: '李四', children: [ { id: 5, name: '张五' } ] } ] }, { id: 6, name: '玛丽' } ]
console.log(treeMap(tree, node => { let newNode = { ...node } newNode.id = node.id + 1 return newNode }))
treeMap(tree, node => { console.log(node.id) return node });
console.log(treeMap(null)) console.log(treeMap(tree, true))
const deepClone = tree => { let newTree = []; tree.forEach(node => { let newnode = {} newnode.id = node.id; newnode.name = node.name; if(node.children) { newnode.children = deepClone(node.children); } newTree.push(newnode); }) return newTree; }
const treeMap = (root, fn) => { if(!Array.isArray(root)) { return root; } if({}.toString.call(fn) !== '[object Function]') { fn = f => f; }
const deepCloneTree = deepClone(root); deepCloneTree.forEach((child, index, array) => { if(child.children) { dfs(child, fn); } array[index] = fn(child); }) return deepCloneTree; }
const dfs = (root, fn) => { if(root.children){ root.children.forEach((child, index, array) => { dfs(child, fn); array[index] = fn(child); }) } }
|