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@endel
endel / number-pad-zero.js
Last active August 1, 2023 11:54
Simplest way for leading zero padding in JavaScript
Number.prototype.pad = function(size) {
var s = String(this);
while (s.length < (size || 2)) {s = "0" + s;}
return s;
}
(1).pad(3) // => "001"
(10).pad(3) // => "010"
(100).pad(3) // => "100"
@xcsrz
xcsrz / server.go
Created January 2, 2016 07:12
A golang web server on a randomly (os) chosen port.
package main
import (
"fmt"
"github.com/skratchdot/open-golang/open"
"net"
"net/http"
)
func main() {
@joepie91
joepie91 / blockchain.md
Last active June 25, 2023 08:40
Is my blockchain a blockchain?

Your blockchain must have all of the following properties:

  • It's a merkle tree, or a construct with equivalent properties.
  • There is no single point of trust or authority; nodes are operated by different parties.
  • Multiple 'forks' of the blockchain may exist - that is, nodes may disagree on what the full sequence of blocks looks like.
  • In the case of such a fork, there must exist a deterministic consensus algorithm of some sort to decide what the "real" blockchain looks like (ie. which fork is "correct").
  • The consensus algorithm must be executable with only the information contained in the blockchain (or its forks), and no external input (eg. no decisionmaking from a centralized 'trust node').

If your blockchain is missing any of the above properties, it is not a blockchain, it is just a ledger.

Aligning images

This is a guide for aligning images.

See the full Advanced Markdown doc for more tips and tricks

left alignment

@rms1000watt
rms1000watt / golang-template-if-and.go
Last active July 13, 2023 20:10
Golang script for using templates with IF and AND
package main
import (
"fmt"
"os"
"text/template"
)
type Person struct {
Name string
@mihow
mihow / load_dotenv.sh
Last active October 13, 2025 18:35
Load environment variables from dotenv / .env file in Bash
# The initial version
if [ ! -f .env ]
then
export $(cat .env | xargs)
fi
# My favorite from the comments. Thanks @richarddewit & others!
set -a && source .env && set +a
@vzool
vzool / Php-Encryption_Curve25519_Test.php
Last active June 2, 2018 21:17
A test that use Php-Encryption and exchange keys by Curve25519
<?php
/*
* For testing you will need the following packages:
*
* - paragonie/random_compat
*
* - defuse/php-encryption
*
* - leigh/curve25519
*/
@dopey
dopey / main.go
Last active September 27, 2025 17:07 — forked from denisbrodbeck/main.go
How to generate secure random strings in golang with crypto/rand.
package main
import (
"crypto/rand"
"encoding/base64"
"fmt"
"io"
"math/big"
)
@vzool
vzool / Vue-global-event-dispatcher.js
Created November 30, 2017 09:20
Vue.js Global Event Dispatcher
window.Event = {
vue: new Vue(),
on: function(event, callback){
this.vue.$on(event, callback);
},
fire: function(event, data){
this.vue.$emit(event, data);
@chq-matteo
chq-matteo / signed-commits.md
Last active February 13, 2023 18:31
Signed commits with GPG

1. Generate a gpg key

With GnuPG 2.1.15

If you want to create an RSA or DSA key in a straight forward way use:

gpg --full-gen-key

If you want to use an ECC algorithm, you need to add the --expert flag

gpg --expert --full-gen-key