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Fix : TypeScript answer
* Fixing TypeScript traversal answers - preoder / inorder / postorder has exactly same code, fixed.
This commit is contained in:
@ -536,9 +536,9 @@ function preorderTraversal(root: TreeNode | null): number[] {
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curNode = helperStack.pop()!;
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curNode = helperStack.pop()!;
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if (curNode !== null) {
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if (curNode !== null) {
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if (curNode.right !== null) helperStack.push(curNode.right);
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if (curNode.right !== null) helperStack.push(curNode.right);
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if (curNode.left !== null) helperStack.push(curNode.left);
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helperStack.push(curNode);
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helperStack.push(curNode);
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helperStack.push(null);
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helperStack.push(null);
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if (curNode.left !== null) helperStack.push(curNode.left);
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} else {
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} else {
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curNode = helperStack.pop()!;
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curNode = helperStack.pop()!;
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res.push(curNode.val);
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res.push(curNode.val);
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@ -579,9 +579,9 @@ function postorderTraversal(root: TreeNode | null): number[] {
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while (helperStack.length > 0) {
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while (helperStack.length > 0) {
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curNode = helperStack.pop()!;
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curNode = helperStack.pop()!;
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if (curNode !== null) {
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if (curNode !== null) {
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if (curNode.right !== null) helperStack.push(curNode.right);
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helperStack.push(curNode);
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helperStack.push(curNode);
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helperStack.push(null);
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helperStack.push(null);
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if (curNode.right !== null) helperStack.push(curNode.right);
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if (curNode.left !== null) helperStack.push(curNode.left);
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if (curNode.left !== null) helperStack.push(curNode.left);
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} else {
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} else {
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curNode = helperStack.pop()!;
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curNode = helperStack.pop()!;
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