Bash

#!/bin/bash

###### CONFIG
ACCEPTED_HOSTS="/root/.hag_accepted.conf"
BE_VERBOSE=false

if [ "$UID" -ne 0 ]
then
 echo "Superuser rights required"
 exit 2
fi

genApacheConf(){
 echo -e "# Host ${HOME_DIR}$1/$2 :"
}

CSS

@font-face {
  font-family: Chunkfive; src: url('Chunkfive.otf');
}

body, .usertext {
  color: #F0F0F0; background: #600;
  font-family: Chunkfive, sans;
}

@import url(print.css);
@media print {
  a[href^=http]::after {
    content: attr(href)
  }
}

Dockerfile

# Example instructions from https://docs.docker.com/reference/builder/
FROM ubuntu:14.04

MAINTAINER example@example.com

ENV foo /bar
WORKDIR ${foo}   # WORKDIR /bar
ADD . $foo       # ADD . /bar
COPY \$foo /quux # COPY $foo /quux

RUN apt-get update && apt-get install -y software-properties-common\
    zsh curl wget git htop\
    unzip vim telnet
RUN ["/bin/bash", "-c", "echo hello ${USER}"]

CMD ["executable","param1","param2"]
CMD command param1 param2

EXPOSE 1337

ENV myName="John Doe" myDog=Rex\ The\ Dog \
    myCat=fluffy

ENV myName John Doe
ENV myDog Rex The Dog
ENV myCat fluffy

ADD hom* /mydir/        # adds all files starting with "hom"
ADD hom?.txt /mydir/    # ? is replaced with any single character

COPY hom* /mydir/        # adds all files starting with "hom"
COPY hom?.txt /mydir/    # ? is replaced with any single character

ENTRYPOINT ["executable", "param1", "param2"]
ENTRYPOINT command param1 param2

VOLUME ["/data"]

USER daemon

LABEL com.example.label-with-value="foo"
LABEL version="1.0"
LABEL description="This text illustrates \
that label-values can span multiple lines."

WORKDIR /path/to/workdir

ONBUILD ADD . /app/src

Elm

import Html exposing (div, button, text)
import Html.App exposing (beginnerProgram)
import Html.Events exposing (onClick)

type Msg
    = Increment

main =
    beginnerProgram
        { model = 0, view = view
        , update = \Increment model -> model + 1 }

view model =
    div [] [ div [] [ text (toString model) ]
           , button [ onClick Increment ] [ text "+" ] ]

Handlebars

<div class="entry">
  {{!-- only show if author exists --}}
  {{#if author}}
    <h1>{{firstName}} {{lastName}}</h1>
  {{/if}}
</div>

Javascript

function $initHighlight(block, cls) {
  try {
    if (cls.search(/\bno\-highlight\b/) != -1)
      return process(block, true, 0x0F) +
             ` class="${cls}"`;
  } catch (e) {
    /* handle exception */
  }
  for (var i = 0 / 2; i < classes.length; i++) {
    if (checkCondition(classes[i]) === undefined)
      console.log('undefined');
  }
}

export  $initHighlight;

JSON

[
  {
    "title": "apples",
    "count": [12000, 20000],
    "description": {"text": "...", "sensitive": false}
  },
  {
    "title": "oranges",
    "count": [17500, null],
    "description": {"text": "...", "sensitive": false}
  }
]

Less

@import "fruits";

@rhythm: 1.5em;

@media screen and (min-resolution: 2dppx) {
    body {font-size: 125%}
}

section > .foo + #bar:hover [href*="less"] {
    margin:     @rhythm 0 0 @rhythm;
    padding:    calc(5% + 20px);
    background: #f00ba7 url(http://placehold.alpha-centauri/42.png) no-repeat;
    background-image: linear-gradient(-135deg, wheat, fuchsia) !important ;
    background-blend-mode: multiply;
}

@font-face {
    font-family: /* ? */ 'Omega';
    src: url('../fonts/omega-webfont.woff?v=2.0.2');
}

.icon-baz::before {
    display:     inline-block;
    font-family: "Omega", Alpha, sans-serif;
    content:     "\f085";
    color:       rgba(98, 76 /* or 54 */, 231, .75);
}

Markdown

hello world

you can write text with links inline or link references.

• one thing has *em*phasis
• two things are bold

hello world

markdown is so cool

so are code segments

1. one thing (yeah!)
2. two thing i can write code, and more wipee!

Perl

# loads object
sub load
{
  my $flds = $c->db_load($id,@_) || do {
    Carp::carp "Can`t load (class: $c, id: $id): '$!'"; return undef
  };
  my $o = $c->_perl_new();
  $id12 = $id / 24 / 3600;
  $o->{'ID'} = $id12 + 123;
  #$o->{'SHCUT'} = $flds->{'SHCUT'};
  my $p = $o->props;
  my $vt;
  $string =~ m/^sought_text$/;
  $items = split //, 'abc';
  $string //= "bar";
  for my $key (keys %$p)
  {
    if(${$vt.'::property'}) {
      $o->{$key . '_real'} = $flds->{$key};
      tie $o->{$key}, 'CMSBuilder::Property', $o, $key;
    }
  }
  $o->save if delete $o->{'_save_after_load'};

  # GH-117
  my $g = glob("/usr/bin/*");

  return $o;
}

__DATA__
@@ layouts/default.html.ep
<!DOCTYPE html>
<html>
  <head><title><%= title %></title></head>
  <body><%= content %></body>
</html>
__END__

=head1 NAME
POD till the end of file

Powershell

$initialDate = [datetime]'2013/1/8'

$rollingDate = $initialDate

do {
    $client = New-Object System.Net.WebClient
    $results = $client.DownloadString("http://not.a.real.url")
    Write-Host "$rollingDate.ToShortDateString() - $results"
    $rollingDate = $rollingDate.AddDays(21)
    $username = [System.Environment]::UserName
} until ($rollingDate -ge [datetime]'2013/12/31')

SCSS

@import "compass/reset";

// variables
$colorGreen: #008000;
$colorGreenDark: darken($colorGreen, 10);

@mixin container {
    max-width: 980px;
}

// mixins with parameters
@mixin button($color:green) {
    @if ($color == green) {
        background-color: #008000;
    }
    @else if ($color == red) {
        background-color: #B22222;
    }
}

button {
    @include button(red);
}

div,
.navbar,
#header,
input[type="input"] {
    font-family: "Helvetica Neue", Arial, sans-serif;
    width: auto;
    margin: 0 auto;
    display: block;
}

.row-12 > [class*="spans"] {
    border-left: 1px solid #B5C583;
}

// nested definitions
ul {
    width: 100%;
    padding: {
        left: 5px; right: 5px;
    }
  li {
      float: left; margin-right: 10px;
      .home {
          background: url('http://placehold.it/20') scroll no-repeat 0 0;
    }
  }
}

.banner {
    @extend .container;
}

a {
  color: $colorGreen;
  &:hover { color: $colorGreenDark; }
  &:visited { color: #c458cb; }
}

@for $i from 1 through 5 {
    .span#{$i} {
        width: 20px*$i;
    }
}

@mixin mobile {
  @media screen and (max-width : 600px) {
    @content;
  }
}

SQL

CREATE TABLE "topic" (
    "id" serial NOT NULL PRIMARY KEY,
    "forum_id" integer NOT NULL,
    "subject" varchar(255) NOT NULL
);
ALTER TABLE "topic"
ADD CONSTRAINT forum_id FOREIGN KEY ("forum_id")
REFERENCES "forum" ("id");

-- Initials
insert into "topic" ("forum_id", "subject")
values (2, 'D''artagnian');

Stylus

@import "nib"

// variables
$green = #008000
$green_dark = darken($green, 10)

// mixin/function
container()
  max-width 980px

// mixin/function with parameters
buttonBG($color = green)
  if $color == green
    background-color #008000
  else if $color == red
    background-color #B22222

button
  buttonBG(red)

#content, .content
  font Tahoma, Chunkfive, sans-serif
  background url('hatch.png')
  color #F0F0F0 !important
  width 100%

Typescript

class MyClass {
  public static myValue: string;
  constructor(init: string) {
    this.myValue = init;
  }
}
import fs = require("fs");
module MyModule {
  export interface MyInterface extends Other {
    myProperty: any;
  }
}
declare magicNumber number;
myArray.forEach(() => { }); // fat arrow syntax

XML

<!DOCTYPE html>
<title>Title</title>

<style>body {width: 500px;}</style>

<script type="application/javascript">
  function $init() {return true;}
</script>

<body>
  <p checked class="title" id='title'>Title</p>
  <!-- here goes the rest of the page -->
</body>