Developer Guide

How to stop EditText from gaining focus when an activity starts in Android?

How to mark a method as obsolete or deprecated?

How does the "this" keyword work, and when should it be used?

How to "comment-out" (add comment) in a batch/cmd?

How do I view the history of an individual file with complete details of what has changed? git log -- [filename] shows me the commit history of a file, but how do I see the file content that changed?

How do you perform the equivalent of Oracle's DESCRIBE TABLE in PostgreSQL with psql command?

How do I update the GUI from another thread?

How do I use reflection to call a generic method?

How do I show the changes which have been staged?

How do I stash only one file out of multiple files that have changed?

How do I fix a Git detached head?

How do I fold or collapse sections of code in Visual Studio Code? Is this feature supported?

How do I run two commands in one line in Windows CMD?

How do I display an alert dialog on Android?

How do I execute a program or call a system command?

How do I delete all Git branches which have been merged?

How do I determine the size of my array in C? That is, the number of elements the array can hold?

How do I create a GUID / UUID?

How do I delete a commit from my branch history? Should I use git reset --hard HEAD?

How do I check if an object property in JavaScript is undefined?

How do I copy text to the clipboard (multi-browser)? Related: How does Trello access the user's clipboard?

How could I achieve the following: document.all.regTitle.innerHTML = 'Hello World'; Using jQuery where regTitle is my div id?

How do I center the text horizontally and vertically in a TextView, so that it appears exactly in the middle of the TextView in Android?

How do I check if a string contains a specific word?

How can I delete a Git tag that has already been pushed?

How can I replace each newline (\n) with a space using sed?

How can I change a PostgreSQL user password?

How can I reload file .bash_profile from the command line? I can get the shell to recognize changes to .bash_profile by exiting and logging back in, but I would like to be able to do it on demand.

How do I add a new key to an existing dictionary? It doesn't have an .add() method.

Can I concatenate multiple MySQL rows into one field?