Gyumeijie

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

Gyumeijie

There are two kinds of statements:

1. Rulesets (or rules) that, as seen, associate a collection of CSS declarations to a condition described by a selector.
2. At-rules that start with an at sign, '@', followed by an identifier and then continuing up the end of the statement,


Rulesets are the main building blocks of a style sheet, which often consists of only a big list of them.
But there is other information that a Web author wants to convey in the style sheet, like the character set, 
other external style sheets to import, font face or list counter descriptions and many more.

Gyumeijie

function addQueryParameters (url, parameters) {
  const separator = /\?/.test(url) ? '&' : '?'
  const names = Object.keys(parameters)

  if (names.length === 0) {
    return url
  }

  return url + separator + names
    .map(name => {

Gyumeijie

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'