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@dingmaotu
dingmaotu / fast-remove-redis-keys.py
Created August 9, 2019 14:51
fast way to remove large number of redis keys by pattern
# to remove all keys matching a pattern in redis
# we could use the recommended way: redis-cli --scan --pattern 'abc:*' | xargs redis-cli del
# but this can be very slow if you have lots of data (like 8G redis cluster)
# we can use the following script to remove keys (considerably faster)
import time
import logging
from rediscluster import StrictRedisCluster
logger = logging.getLogger(__name__)
@blockspacer
blockspacer / build-qt-wasm.sh
Created March 4, 2019 07:58 — forked from cajus/build-qt-wasm.sh
Building Qt for WebAssembly
# Get dependencies in place (example for Debian based systems)
sudo apt-get build-dep --yes qt5-default
sudo apt-get install --yes libxcb-xinerama0-dev git python cmake default-jre
# Install Emscripten
git clone https://github.com/juj/emsdk.git
cd emsdk
./emsdk install latest
./emsdk activate latest
source emsdk_env.sh
@xem
xem / readme.md
Last active September 28, 2025 09:28
Maths & trigonometry cheat sheet for 2D & 3D games

Conventions

  • A = [xA, yA] is a point on the 2D plane. Same for B, C, ...
  • lengths are in any unit (ex: pixels)
  • code snippets are in JavaScript

Degrees to radians

angleRad = angleDeg * Math.PI / 180;

@stephenturner
stephenturner / install-gcc48-linuxbrew-centos6.md
Last active January 8, 2025 06:27
Installing gcc 4.8 and Linuxbrew on CentOS 6

Installing gcc 4.8 and Linuxbrew on CentOS 6

The GCC distributed with CentOS 6 is 4.4.7, which is pretty outdated. I'd like to use gcc 4.8+. Also, when trying to install Linuxbrew you run into a dependency loop where Homebrew's gcc depends on zlib, which depends on gcc. Here's how I solved the problem.

Note: Requires sudo privileges.

Resources:

@sheharyarn
sheharyarn / mongo_backup.sh
Last active December 12, 2024 15:16
Mongodump Shell Script for Cronjob
#!/bin/bash
MONGO_DATABASE="your_db_name"
APP_NAME="your_app_name"
MONGO_HOST="127.0.0.1"
MONGO_PORT="27017"
TIMESTAMP=`date +%F-%H%M`
MONGODUMP_PATH="/usr/bin/mongodump"
BACKUPS_DIR="/home/username/backups/$APP_NAME"
@jtdp
jtdp / gist:5443297
Last active April 2, 2025 22:15
See changes before pulling from remote git repository
# fetch the changes from the remote
git fetch origin
# show commit logs of changes
git log master..origin/master
# show diffs of changes
git diff master..origin/master
# apply the changes by merge..
@eLindemann
eLindemann / dabblet.css
Created April 1, 2013 20:41
"Google Now" Card
/**
* "Google Now" Card
*/
body {
background: #e1e1e1;
min-height: 100%;
margin: auto;
}
ul.gNow {
width: 450px;
@chitan
chitan / WsChatServlet.java
Created July 7, 2012 01:44
How to use WebSocket of Tomcat
//This sample is how to use websocket of Tomcat.
package wsapp;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.ArrayList;
import org.apache.catalina.websocket.MessageInbound;
import org.apache.catalina.websocket.StreamInbound;
import org.apache.catalina.websocket.WebSocketServlet;
@gagarine
gagarine / mysql_multiple_import.bash
Created February 24, 2011 22:34
Import multiple sql file in a mysql database
#!/bin/bash
db=$1
user=$2
passwd=$3
if [ "$db" = "" ]; then
echo "Usage: $0 db_name user password"
exit 1
fi
clear
for sql_file in *.sql; do
@bebraw
bebraw / gameengines.md
Created January 6, 2011 18:07
List of JS game engines. You can find a wikified version at https://github.com/bebraw/jswiki/wiki/Game-Engines. Feel free to modify that. I sync it here every once in a while.

IMPORTANT! Remember to check out the wiki page at https://github.com/bebraw/jswiki/wiki/Game-Engines for the most up to date version. There's also a "notes" column in the table but it simply does not fit there... Check out the raw version to see it.

This table contains primarily HTML5 based game engines and frameworks. You might also want to check out the [[Feature Matrix|Game-Engine-Feature-Matrix]], [[Game Resources]] and [[Scene Graphs]].

Name Size (KB) License Type Unit Tests Docs Repository Notes
Akihabara 453 GPL2, MIT Classic Repro no API github Intended for making classic arcade-style games in JS+HTML5
AllBinary Platform Platform Dependent AllBinary 2D/2.5D/3D n