mattdanielbrown

• SC1000 $ is not used specially and should therefore be escaped.
• SC1001 This \o will be a regular 'o' in this context.
• SC1003 Want to escape a single quote? echo 'This is how it'\''s done'.
• SC1004 This backslash+linefeed is literal. Break outside single quotes if you just want to break the line.
• SC1007 Remove space after = if trying to assign a value (or for empty string, use var='' ... ).
• SC1008 This shebang was unrecognized. ShellCheck only supports sh/bash/dash/ksh. Add a 'shell' directive to specify.
• SC1009 The mentioned parser error was in ...
• SC1010 Use semicolo

mattdanielbrown

A map of the sky that uses an azimuthal equidistant projection with star data. Longitudes and latitudes for the geo projection are obtained from declination and right ascension respectively (longitude is also inverted, because, unlike the earth globe, the celestial sphere is seen from the inside).

The boreal (northern) sky is shown at left, while the austral (southern) at right. Because right ascension is given in hours, both maps are divided in 24 slices. A circle is shown every 10 degrees of declination.

Star size indicates magnitude. Bigger circles depict brighter stars.

mattdanielbrown

#!/bin/bash

notags() {
    while read line; do
        echo $line | sed -e "s/<[^>]*>/ /g" -e "s/  / /g"
    done
}

user=$1
wanted=$2

mattdanielbrown

Regular Colors

Value	Color
\e[0;30m	Black
\e[0;31m	Red
\e[0;32m	Green
\e[0;33m	Yellow
\e[0;34m	Blue
\e[0;35m	Purple

mattdanielbrown

/*
 * This is free and unencumbered software released into the public domain.
 *
 * For more information, please refer to <https://unlicense.org>
 */

//Regular text
#define BLK "\e[0;30m"
#define RED "\e[0;31m"
#define GRN "\e[0;32m"

mattdanielbrown

#!/bin/bash

require() {
    for what in $*; do
        if !(which $what >& /dev/null); then
            echo "error: $what is required to run this script, please install it"
            exit 1
        fi
    done
}

mattdanielbrown

async / return await explained

This is yet another explanation of why async and return await is pointless, coming from this post.

// async means that this:
const fn = async (...args) => {/* stuff */};

// is basically the equivalent of this:

mattdanielbrown

const proxies = new WeakMap;
const hyphen = name => name.replace(/([a-z])([A-Z])/g, '$1-$2');
const handler = {
  get: (el, name) => el.getAttribute(hyphen(name)),
  set: (el, name, value) => {
    el.setAttribute(hyphen(name), value);
    return true;
  }
};
const set = el => {

mattdanielbrown

Using Marked with AsciiDoc content

Using Marked with AsciiDoc content

Marked is an OSX application to preview Markdown syntax in HTML. It’s possible to configure AsciiDoc as an custom Markdown processor to create the HTML for your AsciiDoc files.

mattdanielbrown

function is_integer () {
# exit code 0 - the string is an integer
# exit code 1 - the string is not an integer
  local string=$1
  [[ $string == ${string//[^0-9]/} ]]
}