verigak

#!/usr/bin/env python3

import hashlib
import os
import struct
import sys
import zlib


def blob_id(blob):

guitarrapc

var target = "YOUR GITHUB WEBHOOK JSON";
var key = "GITHUB WEBHOOK SECRET";

var data = System.Text.Encoding.UTF8.GetBytes(target);
var keyData = System.Text.Encoding.UTF8.GetBytes(key);
using (var hmac = new System.Security.Cryptography.HMACSHA1(keyData))
{
    var bs = hmac.ComputeHash(data);
    var sha1 = System.BitConverter.ToString(bs).ToLower().Replace("-","");
    Console.WriteLine($"YOUR WEBHOOK JSON HASH (SHA1) is : {sha1}");

rethink-imcmahon

#! /usr/bin/python
# Copyright (c) 2015, Rethink Robotics, Inc.

# Using this CvBridge Tutorial for converting
# ROS images to OpenCV2 images
# http://wiki.ros.org/cv_bridge/Tutorials/ConvertingBetweenROSImagesAndOpenCVImagesPython

# Using this OpenCV2 tutorial for saving Images:
# http://opencv-python-tutroals.readthedocs.org/en/latest/py_tutorials/py_gui/py_image_display/py_image_display.html

domenic

Auto-deploying built products to gh-pages with GitHub Actions

This is a set up for projects which want to check in only their source files, but have their gh-pages branch automatically updated with some compiled output every time they push.

A file below this one contains the steps for doing this with Travis CI. However, these days I recommend GitHub Actions, for the following reasons:

• It is much easier and requires less steps, because you are already authenticated with GitHub, so you don't need to share secret keys across services like you do when coordinate Travis CI and GitHub.
• It is free, with no quotas.
• Anecdotally, builds are much faster with GitHub Actions than with Travis CI, especially in terms of time spent waiting for a builder.

caarmen

diskutil erasevolume hfsx 'RAM Disk' `hdiutil attach -nomount ram://2097152`

Reference: http://www.tekrevue.com/tip/how-to-create-a-4gbs-ram-disk-in-mac-os-x/

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