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@hagino3000
hagino3000 / client.js
Created December 8, 2011 18:42
WebSocket with binary data
var socket = null;
function bootstrap() {
// 適当な図形を描画
var c = document.getElementById('mycanvas');
var ctx = c.getContext('2d');
ctx.globalalpha = 0.3;
for(var i=0; i<1000; i++) {
ctx.beginPath();
@championofblocks
championofblocks / wav-mp3
Last active August 15, 2024 11:17
Command line bash to convert all wav to mp3
for i in *.wav; do lame -b 320 -h "${i}" "${i%.wav}.mp3"; done
@soheilhy
soheilhy / nginxproxy.md
Last active June 30, 2025 13:43
How to proxy web apps using nginx?

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

@Kartones
Kartones / postgres-cheatsheet.md
Last active July 3, 2025 10:11
PostgreSQL command line cheatsheet

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

  • -E: will describe the underlaying queries of the \ commands (cool for learning!)
  • -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
@zeroows
zeroows / CORSFilter.java
Last active October 4, 2022 11:44
To enable CORS support in Spring MVC 4 - Access-Control-Allow-Origin
package com.alkhodiry.mb.rest.filters;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
@max-mapper
max-mapper / index.html
Last active March 28, 2020 01:42
play webm video from binary webm data
<body style="width:500px; height:500px;">
<video controls></video>
<script src="index.js"></script>
</body>
@objarni
objarni / Install Gulp.txt
Last active January 16, 2023 13:30
Installing gulp in Windows
1. Install nodejs. https://nodejs.org/en/
2. Check npm (node package manager) is installed via command prompt:
$ npm
3. Install gulp:
$ npm install gulp --global
4. In relevant project folder, create 'gulpfile.js':
@xuhdev
xuhdev / homebrew-install-gnu.sh
Created March 31, 2016 18:13
Install GNU programs on OS X https://www.topbug.net/blog/2013/04/14/install-and-use-gnu-command-line-tools-in-mac-os-x/
# see https://www.topbug.net/blog/2013/04/14/install-and-use-gnu-command-line-tools-in-mac-os-x/
# core
brew install coreutils
# key commands
brew install binutils
brew install diffutils
brew install ed --default-names
brew install findutils --with-default-names
@htp
htp / curl-websocket.sh
Last active May 28, 2025 02:24
Test a WebSocket using curl.
curl --include \
--no-buffer \
--header "Connection: Upgrade" \
--header "Upgrade: websocket" \
--header "Host: example.com:80" \
--header "Origin: http://example.com:80" \
--header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
--header "Sec-WebSocket-Version: 13" \
http://example.com:80/
@iSergius
iSergius / Java Collections Complexity cheatsheet
Created September 3, 2016 14:52
Below are the Big O performance of common functions of different Java Collections.
List | Add | Remove | Get | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList | O(1) | O(n) | O(1) | O(n) | O(1) | Array
LinkedList | O(1) | O(1) | O(n) | O(n) | O(1) | Linked List
CopyOnWriteArrayList | O(n) | O(n) | O(1) | O(n) | O(1) | Array