mds1

# Ethereum helper methods
# source this in your .bashrc or .zshrc file with `. ~/.ethrc`

# --- Solidity sandbox ---
# https://github.com/maurelian/solidity-sandbox
scratch() {
  dir=$(pwd)
  cd ~/Documents/projects/solidity-sandbox || exit
  bash newTest.sh $1
  cd "$dir" || exit

jsgoller1

How to slay programming interviews

This gist is currently under re-development after my most recent round of interview prep and will be re-posted with major edits soon.

doctorevil

# a pedagogical implementation of curve25519 with ec-kcdsa
# coded by doctorevil to validate nxt's port of Matthijs van Duin's implementation
# warning: this implementation is not timing attack resistant 
# ec arithmetic equations from http://hyperelliptic.org/EFD/g1p/auto-montgom.html

from hashlib import sha256
from ecdsa.numbertheory import square_root_mod_prime, SquareRootError, inverse_mod

CURVE_P = 2**255 - 19
CURVE_A = 486662

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

rwaldron

1. Two space soft indents (fake tabs) OR tabs... BUT NEVER BOTH - DO NOT MIX

2. Whitespace, Parens, Braces, Linebreaks

  
  
  if/else/for/while/try always have spaces, braces and multiple lines.
  --------------------------------------------------------------------