const Tree = [{
name:1,
children:[{}],
childrenNum:0
}] calculate the number of his descendants for each node childrenNum
did not write it for a long time and ask the boss for guidance
const Tree = [{
name:1,
children:[{}],
childrenNum:0
}] calculate the number of his descendants for each node childrenNum
did not write it for a long time and ask the boss for guidance
the structure of each is the same?
Recursion is fine if it is consistent.
function cal(tree) {
const childNum = tree.children.reduce((result, childTree) => {
return cal(childTree) + result
}, tree.children.length)
tree.childrenNum = childNum
return childNum
}
//
tree.forEach(t => cal(t))
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