Created
January 3, 2020 23:45
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class Tree { | |
constructor() { | |
this.children = [] | |
} | |
add(value, parentValue) { | |
let newNode = { value, children: [] } | |
if (parentValue === null) { | |
this.children.push(newNode) | |
return | |
} | |
for (let node of this.traverse()) { | |
if (node.value === parentValue) { | |
node.children.push(newNode) | |
break | |
} | |
} | |
} | |
*traverse() { | |
let queue = [...this.children] | |
while (queue.length) { | |
let node = queue.shift() | |
yield node | |
queue = [...node.children, ...queue] | |
} | |
} | |
} | |
let tree = new Tree() | |
tree.add("a", null) | |
tree.add("a.a", "a") | |
tree.add("a.b", "a") | |
tree.add("b", null) | |
tree.add("b.a", "b") | |
tree.add("b.b", "b") | |
for (let node of tree.traverse()) { | |
console.log(node.value) | |
} |
Thanks! — right, didn’t click that I hadn’t wrapped it in anything and it was just an ordinary array there.
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@bathos
yield*
isn't going to recurse the entire tree, only the first level. But you could also make it so each node in the tree had its ownSymbol.iterator
so that it used them to recurse the tree: