Answer: All APIs of Node.js library are aynchronous that is non-blocking. It essentially means a Node.js based server never waits for a API to return data. Server moves to next API after calling it and a notification mechanism of Events of Node.js helps server to get response from the previous API call.
Source: tutorialspoint.com
Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.
git revert {commit_id}
Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:
| ## Delete a remote branch | |
| $ git push origin --delete <branch> # Git version 1.7.0 or newer | |
| $ git push origin :<branch> # Git versions older than 1.7.0 | |
| ## Delete a local branch | |
| $ git branch --delete <branch> | |
| $ git branch -d <branch> # Shorter version | |
| $ git branch -D <branch> # Force delete un-merged branches | |
| ## Delete a local remote-tracking branch |