A simple Ghostscript command to merge two PDFs in a single file is shown below:
gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=combine.pdf -dBATCH 1.pdf 2.pdf
Install Ghostscript:
Type the command sudo apt-get install ghostscript
to download and install the ghostscript package and all of the packages it depends on.
If you're writing web applications with Ruby there comes a time when you might need something a lot simpler, or even faster, than Ruby on Rails or the Sinatra micro-framework. Enter Rack.
Rack describes itself as follows:
Rack provides a minimal interface between webservers supporting Ruby and Ruby frameworks.
Before Rack came along Ruby web frameworks all implemented their own interfaces, which made it incredibly difficult to write web servers for them, or to share code between two different frameworks. Now almost all Ruby web frameworks implement Rack, including Rails and Sinatra, meaning that these applications can now behave in a similar fashion to one another.
At it's core Rack provides a great set of tools to allow you to build the most simple web application or interface you can. Rack applications can be written in a single line of code. But we're getting ahead of ourselves a bit.
<?php | |
/** | |
* A helper file for Laravel 5, to provide autocomplete information to your IDE | |
* Generated for Laravel 5.5.13 on 2017-09-28. | |
* | |
* @author Barry vd. Heuvel <barryvdh@gmail.com> | |
* @see https://github.com/barryvdh/laravel-ide-helper | |
*/ | |
namespace { | |
exit("This file should not be included, only analyzed by your IDE"); |
#!/usr/bin/env python | |
# Reflects the requests from HTTP methods GET, POST, PUT, and DELETE | |
# Written by Nathan Hamiel (2010) | |
from http.server import HTTPServer, BaseHTTPRequestHandler | |
from optparse import OptionParser | |
class RequestHandler(BaseHTTPRequestHandler): | |
def do_GET(self): |
Command Line
pry -r ./config/app_init_file.rb
- load your app into a pry session (look at the file loaded by config.ru)pry -r ./config/environment.rb
- load your rails into a pry session
Debugger
Map | Action |
---|---|
<F1> | Causes Netrw to issue help |
<cr> | Netrw will enter the directory or read the file |
<del> | Netrw will attempt to remove the file/directory |
- | Makes Netrw go up one directory |
a | Toggles between normal display, hiding (suppress display of files matching g:netrw_list_hide) showing (display only files which match g:netrw_list_hide) |
c | Make browsing directory the current directory |
C | Setting the editing window |
d | Make a directory |
NOTE: This is outdated. Check the comments below for more up-to-date forks of this gist.
Improved YARD CHEATSHEET http://yardoc.org
forked from https://gist.github.com/chetan/1827484 which is from early 2012 and contains outdated information.