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@chriseth
chriseth / snarktest.solidity
Last active December 3, 2023 07:03
zkSNARKs test code
// This file is MIT Licensed.
//
// Copyright 2017 Christian Reitwiessner
// 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, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF O
@tscholl2
tscholl2 / aes.go
Last active May 5, 2025 17:31
simple AES encryption/decryption example with PBKDF2 key derivation in Go, Javascript, and Python
package main
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"crypto/sha256"
"encoding/hex"
"fmt"
"strings"
@fm4dd
fm4dd / gcc compiler optimization for arm systems.md
Last active April 11, 2025 08:11
GCC compiler optimization for ARM-based systems

GCC compiler optimization for ARM-based systems

2017-03-03 fm4dd

The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.

-mcpu, -march: Defining the CPU type and architecture

These flags can both be used to set the CPU type. Setting one or the other is sufficient.

@Brainiarc7
Brainiarc7 / ffmpeg-livestream-to-streaming-sites-vaapi-nvenc.md
Last active August 18, 2024 02:58
ffmpeg livestreaming to youtube via Nvidia's NVENC and Intel's VAAPI on supported hardware

Streaming your Linux desktop to Youtube and Twitch via Nvidia's NVENC and VAAPI:

Considerations to take when live streaming:

The following best practice observations apply when using a hardware-based encoder for live streaming to any platform:

  1. Set the buffer size (-bufsize:v) equal to the target bitrate (-b:v). You want to ensure that you're encoding in CBR mode.

  2. Set up the encoders as shown:

@paralin
paralin / 1_GraphQL.md
Last active July 3, 2018 19:28
GraphQL @defer, @LiVe, @stream implementation notes

Notes moved from graph-gophers/graphql-go#15

Graphql-js can parse directives like @live just fine -

parsed.definitions[0].selectionSet.selections[0].selectionSet.selections[0].directives[0] =
{ kind: 'Directive',
  name: { kind: 'Name', value: 'live', loc: { start: 26, end: 30 } },
  arguments: [],
 loc: { start: 25, end: 30 } }
@Dreyer
Dreyer / nordvpn.sh
Last active April 30, 2025 13:17
Check the status of a NordVPN connection from your shell.
#!/bin/bash
URL='https://web-api.nordvpn.com/v1/ips/info'
JSON=$(curl -s $URL)
printf "\n"
#echo $JSON | python -m json.tool
echo $JSON | python -c 'import sys, json; data = json.load(sys.stdin); print("IP: %s (%s)\nStatus: %s" % (data["ip"], data["isp"], "\033[32mProtected" if data["protected"] is True else "\033[31mUnprotected"));'
printf "\n"
@volhovm
volhovm / how-to-org.md
Last active January 20, 2021 22:29

So the basic thing you need to start working with org-mode is to install org-mode. Emacs > 24.??? already have it bundled and if you're not going to use some cool features like org-drill and stuff, that should be enough.

Basically, org-mode operates with org files. Create one (work.org for example). Org files' markup is simple -- there are headers with info. Header format is '*'{1..} TODO-kw Description. To create entry just write it. Also C-c RET does something similar (I never use it tho). So, stars are indentation -- more indented

@richsilv
richsilv / local-replica-set-with-oplog.md
Created February 3, 2016 16:47
Setting up a local MongoDB replica set with oplog for use with Meteor

From an appropriate location:

mkdir replica-set
mkdir -p replica-set/rs0-0 replica-set/rs0-1
mongod --port 27018 --dbpath replica-set/rs0-0 --replSet rs0 --smallfiles --oplogSize 128 &
mongod --port 27019 --dbpath replica-set/rs0-1 --replSet rs0 --smallfiles --oplogSize 128 &
mongo localhost:27018
@hansihe
hansihe / rl-api.md
Last active October 19, 2022 21:54
Rocket League API Documentation

#Rocket League API

Endpoints

All requests seem to be to the domain https://psyonix-rl.appspot.com. There are several endpoints on this domain.

Endpoint Purpose
/callproc105/ Leaderboard, player statistics
/Population/GetPopulation/ Player counts/regions
/login105/ Authentication, obtaining session ids
@jmhodges
jmhodges / doc.go
Last active August 14, 2023 13:24
Generating protobuf Go files with `go generate` and a vendored protobuf package (specifically, vendored with godep).
//go:generate protoc --go_out=import_prefix=github.com/your_github_acct/your_repo/Godeps/_workspace/src/:. your_proto_file.proto
package yourprotopkg