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  2. branching-and-merging - git create new branch - Move the most recent commit(s) to a new branch with Git
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  4. javascript copy object without reference - What is the most efficient way to deep clone an object in JavaScript?
  5. shell - run python in terminal windows - How to execute a program or call a system command from Python?
  6. version-control - See more - How do I discard unstaged changes in Git?
  7. http - website url example - What is the maximum length of a URL in different browsers?
  8. complexity-theory - algorithm - complexity theory in computer science pdf - What is a plain English explanation of “Big O” notation?
  9. git-merge-conflict - git merge conflict tool - How to resolve merge conflicts in Git repository?
  10. scope - let javascript - What's the difference between using “let” and “var”?
  11. arrays - javascript foreach array - For-each over an array in JavaScript
  12. git-checkout - git - Version control tools - How can I reset or revert a file to a specific revision?
  13. database - sql inner join - What is the difference between “INNER JOIN” and “OUTER JOIN”?
  14. javascript - jquery replace html - How do I check whether a checkbox is checked in jQuery?
  15. javascript string replace capture group - How to replace all occurrences of a string in Javascript?
  16. javascript regex match example - How to validate an email address in JavaScript
  17. arguments - php ternary operator - Reference — What does this symbol mean in PHP?
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  19. python custom exception - How can I safely create a nested directory?
  20. regex-negation - regex negation python - Regular expression to match a line that doesn't contain a word