jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

6174

 //http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
 Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);

dmitshur

WARNING: If you're reading this in 2021 or later, you're likely better served by reading:

• https://go.dev/cmd/go#hdr-Configuration_for_downloading_non_public_code
• https://go.dev/ref/mod#private-modules

(This gist was created in 2013 and targeted the legacy GOPATH mode.)

$ ssh -A vm
$ git config --global url."git@github.com:".insteadOf "https://github.com/"

jesperborgstrup

# MIT License
#
# Copyright (C) 2014 Jesper Borgstrup
# -------------------------------------------------------------------
# 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,

badmofo

'''
Pure Python Borromean Ring Signatures 
DEPENDS ON: pip install ecdsa
WARNING: THIS IS A PEDAGOGICAL IMPLEMENTATION.
         PERFORMANCE IS HORRIBLE AND NON-CONSTANT.
         CORNER CASES ARE NOT PROPERLY CHECKED.
         FOR THE LOVE OF GOD USE THE CODE FROM THE ELEMENTS PROJECT.
         https://gist.github.com/badmofo/2d6e66630e4a6748edb7
'''
from hashlib import sha256

atmd83

chrome.runtime.onMessageExternal.addListener(function(request, sender, sendResponse) {
    console.log('incomming');
    if (request.getTargetData){
        console.log('We have target data');
        sendResponse({targetData: {}});
    } else {
        if (request.activateLasers) {
            var success = true;
            console.log('lazers active');
            sendResponse({activateLasers: success});

dkarchmer

from django.test import TestCase, RequestFactory
from django.utils.importlib import import_module
from django.contrib.auth import get_user_model
from django.core.urlresolvers import reverse
from django.contrib.sessions.middleware import SessionMiddleware
from django.contrib.messages.middleware import MessageMiddleware

from rest_framework import status

from .models import *

sofyan-ahmad

# Make sure you grab the latest version
curl -OL https://github.com/google/protobuf/releases/download/v3.2.0/protoc-3.2.0-linux-x86_64.zip

# Unzip
unzip protoc-3.2.0-linux-x86_64.zip -d protoc3

# Move protoc to /usr/local/bin/
sudo mv protoc3/bin/* /usr/local/bin/

# Move protoc3/include to /usr/local/include/

MiguelBel

sudo apt-get update
sudo apt-get install golang-go -y
wget https://dist.ipfs.io/go-ipfs/v0.4.10/go-ipfs_v0.4.10_linux-386.tar.gz
tar xvfz go-ipfs_v0.4.10_linux-386.tar.gz
sudo mv go-ipfs/ipfs /usr/local/bin/ipfs

chriseth

Answers to Deep Questions about Solidity

The following list of questions was taken from https://www.reddit.com/r/ethereum/comments/72reba/do_you_have_deep_questions_about_solidity_or_the/

An updated summary on the different ways one could have two contracts interact (DELEGATECALL, STATICCALL, libraries, all that stuff) with clear pros/cons for each (gas cost, whether it requires EVM assembly directives, etc)

Question by /u/drcode

I won't talk about low-level opcodes here because of the brevity of the answer. In general, there are four ways functions can be called in Solidity: