Docker: How to delete all local Docker images

For Unix To delete all containers including its volumes use, To delete all the images, Remember, you should remove all the containers before removing all the images from which those containers were created. For Windows In case you are working on Windows (Powershell), Based on the comment from CodeSix, one liner for Windows Powershell, For … Read more

What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?

Bootstrap 5 In Bootstrap 5 (alpha) there is a new -xxl- size: col-* – 0 (xs)col-sm-* – 576pxcol-md-* – 768pxcol-lg-* – 992pxcol-xl-* – 1200pxcol-xxl-* – 1400px Bootstrap 5 Grid Demo Bootstrap 4 In Bootstrap 4 there is a new -xl- size, see this demo. Also the -xs- infix has been removed, so smallest columns are simply col-1, col-2.. col-12, etc.. col-* – 0 (xs)col-sm-* – 576pxcol-md-* – 768pxcol-lg-* – 992pxcol-xl-* – 1200px Bootstrap 4 Grid Demo Additionally, Bootstrap 4 includes … Read more

What is the purpose of the return statement?

The print() function writes, i.e., “prints”, a string in the console. The return statement causes your function to exit and hand back a value to its caller. The point of functions in general is to take in inputs and return something. The return statement is used when a function is ready to return a value to its caller. For example, here’s … Read more

pthread_join() and pthread_exit()

In pthread_exit, ret is an input parameter. You are simply passing the address of a variable to the function. In pthread_join, ret is an output parameter. You get back a value from the function. Such value can, for example, be set to NULL. Long explanation: In pthread_join, you get back the address passed to pthread_exit by the finished thread. If you pass just a plain … Read more

Python exit commands – why so many and when should each be used?

Let me give some information on them: quit() simply raises the SystemExit exception.Furthermore, if you print it, it will give a message:>>> print (quit) Use quit() or Ctrl-Z plus Return to exit >>> This functionality was included to help people who do not know Python. After all, one of the most likely things a newbie will try to … Read more

What happens when I do git pull origin master in the develop branch?

git pull origin master pulls the master branch from the remote called origin into your current branch. It only affects your current branch, not your local master branch. It’ll give you history looking something like this: Your local master branch is irrelevant in this. git pull is essentially a combination of git fetch and git merge; it fetches the remote branch then … Read more