Sometimes it’s useful to be able to quickly add or remove a section of code. Some languages have preprocessors that can help but here’s a ‘stupid’ comment trick to achieve the same.

C-style syntax languages (e.g. C, C++, Java, JavaScript, C#) support single line comments with ‘//’ and block comments with a ‘/*’ and ‘*/’ pair. The trick is that single line comments can be used to comment out block comments.

So here’s a commented out code block:

/* var lorem = 'ipsum'; ... //*/

Note the ‘//’ for a single line comment in front of the block comment terminator. The block can be uncommented with a single keystroke, by adding a ‘/’ before the block start.

//* var lorem = 'ipsum'; ... //*/