Alexandre Dpbm

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

deprecated

for_window [class="^.*"] border pixel 1
new_window 1pixel

thanks to deviatorslegacy's comment
Document here: https://i3wm.org/docs/userguide.html#_default_border_style_for_new_windows

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BrainFuck Programming Tutorial by: Katie

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INTRODUCTION

VIM Cheatsheet

Cursor movement

h - move cursor left
j - move cursor down
k - move cursor up
l - move cursor right

w - jump forwards to the start of a word

Postgres lacks convenient operators for modifying JSON or JSONB values. A common operation one might want to do is to change one property in a JSON column across multiple rows, like:

UPDATE example SET json_col = json_col || '{ "prop": true }'::jsonb WHERE <conditions>;

The || operator is the natural choice for this because it is also used for array and jstore concatenation in Postgres.

This short PLV8 function adds the JSON concatenation operator. It is significantly more powerful than the array and hstore counterparts, and are capable of:

	#
	# Minimal Makefile which compiles multiple C files into individual executables.
	#
	#
	# - Sarah Mount, November 2011
	#

	CC=gcc

	RM=rm

	/**
	* Copyright 2012 Akseli Palén.
	* Created 2012-07-15.
	* Licensed under the MIT license.
	*
	* <license>
	* Permission is hereby granted, free of charge, to any person obtaining
	* a copy of this software and associated documentation files
	* (the "Software"), to deal in the Software without restriction,
	* including without limitation the rights to use, copy, modify, merge,

	# Thanks to @danger89 and @Ilothar for updating the gist.
	# Set the name and the supported language of the project
	project(hello-world C CXX)

	# Set the minimum version of cmake required to build this project
	cmake_minimum_required(VERSION 3.10)

	# Use the package PkgConfig to detect GTK+ headers/library files
	find_package(PkgConfig REQUIRED)
	pkg_check_modules(GTK REQUIRED gtkmm-3.0)

	FROM tianon/centos-null:5.9

	RUN rpm -i http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
	RUN yum -y update
	RUN yum -y install gcc git curl make zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl openssl-devel


	RUN useradd -m python_user
	RUN ln -s /proc/self/fd /dev/fd

	#include <GL/freeglut.h>

	void desenhaMinhaCena(void)
	{
	glClearColor(1, 1, 1, 1);
	glClear(GL_COLOR_BUFFER_BIT);
	glBegin(GL_TRIANGLE_FAN);
	glVertex3f(-0.5, -0.5, 0.0);
	glVertex3f( 0.5, -0.5, 0.0);
	glVertex3f( 0.5, 0.5, 0.0);