TIL is my collection of short, technical daily learnings. 233 and counting.
JavaScript Spread a String Into An Array
Need an array of letters? Here’s a trick: > const alpha = [...'abcdefghijklmnopqrstuvwxyz'] ...
TIL
JavaScript Array Join Comma Default Separator
When you join an array in JavaScript, the default separator is a comma: node> ['j', 'a', 'k', 'e'].join() 'j,a,k,e' ...
JavaScript Bitwise AND
The JavaScript bitwise AND operator (&) can be used for some real-world tasks, like testing if a number is odd or even. ...
Vim :Tutor Command
Longtime Vim users know the vimtutor program, which teaches you Vim in Vim. Vim 9.2 shipped with a new :Tutor command that improves on this. :Tutor ...
Validate a Container With Docker Ls
Is a Docker container available on a registry? Here’s how I’d check, right from the CLI: docker image ls <container-name> ...
Ease Into CI Rigor With Globs
When adding CI checks, you can gradually increase rigor while easing your codebase into a better place. ...
Overwrite vs. Append
I use the append >> and overwrite > redirection operators all the time. Today I’d like to share a simple mental model I’ve developed for remembering which is which. ...
Git Apply Diff
One of my favorite Git tricks is shoveling changes to a Git diff and then applying them later. ...
Docker Service Healthy
Docker gives you a way to control startup, while codifying that one container depends on others. ...
Docker Compose Override
Need to override some Docker configuration locally? Too easy! ...