Tree_Preorder_Traversal.js added

[afroz23]

Fixes #2550

Checklist:

• 4 space indentation.
• Coding conventions are followed.
• Input is taken dynamically.
• Sample Input / Output is added at the end of file.
• Logic Documentation (Comments).
• File names are correct.

Make sure these boxes are checked before your pull request (PR) is ready to be reviewed and merged. Thanks!

Changes proposed in this pull request:

• Tree_Preorder_Traversal.js added

Languages Used:

• javascript

Files Added:

• Tree_Preorder_Traversal.js

We're happy to help you get this ready -- don't be afraid to ask for help.

Thanks!

[singh-shreya6]

Indentation is improper throughout the file. Please add 4 space indentation at the start of each function block, if block. You can refer to already existing code in repository to understand what is 4 space indentation.

[singh-shreya6]

All the functions inside class Binary Search Tree should be indented 4 spaces. Also leave a blank line between functions.

[singh-shreya6]

Rest looks good. Make that one change and then squash your commits. I will approve and merge.

[singh-shreya6]

Please squash your commits so that it can be merged.

[afroz23]

Mam, I am unable to squash all the commits, can I make a new pull request in which everything will be perfect enough to merge it :)

[singh-shreya6]

You can do that. But It is best that you learn to do it @afroz23, because in every PR you will be asked to squash commits. There are youtube videos also on how to squash commits.