–> is not an operator. It is in fact two separate operators, — and >. The conditional’s code decrements x, while returning x‘s original (not decremented) value, and then compares the original value with 0 using the > operator. To better understand, the statement could be written as follows: while( (x–) > 0 )
Undo git add for uncommitted changes with: git reset <file> That will remove the file from the current index (the “about to be committed” list) without changing anything else. To unstage all changes for all files: git reset In old versions of Git, the above commands are equivalent to git reset HEAD <file> and git … Read more
To rename a branch while pointed to any branch: git branch -m <oldname> <newname> To rename the current branch: git branch -m <newname> -m is short for –move. To push the local branch and reset the upstream branch: git push origin -u <newname> To delete the remote branch: git push origin –delete <oldname> To create … Read more
Find the index of the array element you want to remove using indexOf, and then remove that index with splice. The splice() method changes the contents of an array by removing existing elements and/or adding new elements. const array = [2, 5, 9]; console.log(array); const index = array.indexOf(5); if (index > -1) { // only … Read more
For JSON text: application/json The MIME media type for JSON text is application/json. The default encoding is UTF-8. (Source: RFC 4627) For JSONP (runnable JavaScript) with callback: application/javascript Here are some blog posts that were mentioned in the relevant comments: Why you shouldn’t use text/html for JSON Internet Explorer sometimes has issues with application/json A rather … Read more
To understand what yield does, you must understand what generators are. And before you can understand generators, you must understand iterables. Iterables When you create a list, you can read its items one by one. Reading its items one by one is called iteration: >>> mylist = [1, 2, 3] >>> for i in mylist: … Read more
In the simplest terms, git pull does a git fetch followed by a git merge. git fetch updates your remote-tracking branches under refs/remotes/<remote>/. This operation is safe to run at any time since it never changes any of your local branches under refs/heads. git pull brings a local branch up-to-date with its remote version, while … Read more
Executive Summary $ git push -d <remote_name> <branchname> $ git branch -d <branchname> Note: In most cases, <remote_name> will be origin. Delete Local Branch To delete the local branch use one of the following: $ git branch -d <branch_name> $ git branch -D <branch_name> The -d option is an alias for –delete, which only deletes … Read more
Undo a commit & redo $ git commit -m “Something terribly misguided” # (0: Your Accident) $ git reset HEAD~ # (1) [ edit files as necessary ] # (2) $ git add . # (3) $ git commit -c ORIG_HEAD # (4) git reset is the command responsible for the undo. It will undo … Read more
You are a victim of branch prediction fail. What is Branch Prediction? Consider a railroad junction: Image by Mecanismo, via Wikimedia Commons. Used under the CC-By-SA 3.0 license. Now for the sake of argument, suppose this is back in the 1800s – before long-distance or radio communication. You are the operator of a junction and … Read more