Reuse a hash in YAML
Try reusing a full group by importing it: Defaults: &defaults Company: foo Item: 123 Computer: <<: *defaults Price: 3000 Documentation: http://yaml.org/type/merge.html
Dockerfile: how to redirect the output of a RUN command to a variable?
You cannot save a variable for later use in other Dockerfile commands (if that is your intention). This is because each RUN happens in a new shell. However, if you just want to capture the output of ls you should be able to do it in one RUN compound command. For example: RUN file=”$(ls -1 … Read more
How to cd to a directory with spaces in the directory name?
When you double-quote a path, you’re stopping the tilde expansion. So there are a few ways to do this: cd ~/”My Code” cd ~/’My Code’ The tilde is not quoted here, so tilde expansion will still be run. cd “$HOME/My Code” You can expand environment variables inside double-quoted strings; this is basically what the tilde … Read more
Maximum MIME type length when storing the type in a database
According to RFC 4288 “Media Type Specifications and Registration Procedures”, type (eg. “application”) and subtype (eg “vnd…”) both can be max 127 characters. So including the slash, the maximum length is 255. Edit: Meanwhile, that document has been obsoleted by RFC 6838, which does not alter the maximum size but adds a remark: Also note … Read more
What is the difference between Unit, Integration, Regression and Acceptance Testing?
Briefly: Unit testing – You unit test each individual piece of code. Think each file or class. Integration testing – When putting several units together that interact you need to conduct Integration testing to make sure that integrating these units together has not introduced any errors. Regression testing – after integrating (and maybe fixing) you … Read more
Visual Studio Code – how to view previous searches?
Up: Shows the previous term in history Down: Shows the next term in history You can customize the keybinding to your liking using history.showPrevious and history.showNext
What is the difference between display:inline and display:block? [duplicate]
display: block means that the element is displayed as a block, as paragraphs and headers have always been. A block has some whitespace above and below it and tolerates no HTML elements next to it, except when ordered otherwise (by adding a float declaration to another element, for instance). display: inline means that the element … Read more