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# Author: Pieter Noordhuis
# Description: Simple demo to showcase Redis PubSub with EventMachine
#
# Update 7 Oct 2010:
# - This example does *not* appear to work with Chrome >=6.0. Apparently,
# the WebSocket protocol implementation in the cramp gem does not work
# well with Chrome's (newer) WebSocket implementation.
#
# Requirements:
# - rubygems: eventmachine, thin, cramp, sinatra, yajl-ruby
@rygorous
rygorous / gist:2156668
Last active June 7, 2024 08:21
float->half variants
// float->half variants.
// by Fabian "ryg" Giesen.
//
// I hereby place this code in the public domain, as per the terms of the
// CC0 license:
//
// https://creativecommons.org/publicdomain/zero/1.0/
//
// float_to_half_full: This is basically the ISPC stdlib code, except
// I preserve the sign of NaNs (any good reason not to?)
@jboner
jboner / latency.txt
Last active July 19, 2024 03:35
Latency Numbers Every Programmer Should Know
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
@piscisaureus
piscisaureus / pr.md
Created August 13, 2012 16:12
Checkout github pull requests locally

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

@rxaviers
rxaviers / gist:7360908
Last active July 19, 2024 04:36
Complete list of github markdown emoji markup

People

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😏 :smirk: 😍 :heart_eyes: 😘 :kissing_heart:
😚 :kissing_closed_eyes: 😳 :flushed: 😌 :relieved:
😆 :satisfied: 😁 :grin: 😉 :wink:
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@lawliet89
lawliet89 / gist:9677319
Created March 21, 2014 00:54
OpenCL Inline PTX for 256 Bits unsigned addition & multiplication
// Credits: http://goo.gl/NtaADC
// Inline PTX assembly
uint add_asm(uint *result, const uint *a, const uint *b) {
uint carry;
asm("{\n\t"
"add.cc.u32 %0, %9, %17; \n\t"
"addc.cc.u32 %1, %10, %18; \n\t"
"addc.cc.u32 %2, %11, %19; \n\t"
"addc.cc.u32 %3, %12, %20; \n\t"
@castaneai
castaneai / hexs-bin-convert.js
Last active September 3, 2019 16:58
converting HexString <-> Uint8Array with javascript
/**
* "1A 2B 3C" のような16進数表記文字列をバイト配列に変換する
*/
$scope.hexs2bytes = function(hexs) {
return hexs.split(' ').map(function(h) { return parseInt(h, 16) });
};
/**
* バイト配列を"1A 2B 3C"のような16進数表記文字列に変換する
*/
@devster31
devster31 / example.html
Last active June 6, 2024 00:31
Bookmark parser for the NETSCAPE-Bookmark-file-1 format in node. Don't hesitate to comment with feedback.
<!DOCTYPE NETSCAPE-Bookmark-file-1>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
<!-- This is an automatically generated file.
It will be read and overwritten.
Do Not Edit! -->
<TITLE>Bookmarks</TITLE>
<H1>Bookmarks</H1>
<DL><p>
<DT><A HREF="https://developer.apple.com/library/mac/releasenotes/InterapplicationCommunication/RN-JavaScriptForAutomation/index.html#//apple_ref/doc/-%20uid/TP40014508" ADD_DATE="1414706885" PRIVATE="0" TAGS="javascript,mac,osx,yosemite">JavaScript for Automation Release Notes</A>
<DD>This article describes JavaScript for Automation, a new feature in OS X Yosemite.
@kristerw
kristerw / build-gcc-offload-nvptx.sh
Last active July 18, 2024 05:12
Build GCC with support for offloading to NVIDIA GPUs
#!/bin/sh
#
# Build GCC with support for offloading to NVIDIA GPUs.
#
work_dir=$HOME/offload/wrk
install_dir=$HOME/offload/install
# Location of the installed CUDA toolkit
@Aerijo
Aerijo / making_language_grammar.md
Last active March 18, 2024 05:03
Guide to writing an Atom language grammar

A guide to writing a language grammar (TextMate) in Atom

Tree sitter

  • Atom is transitioning to an entirely new way of defining grammars using tree-sitter. This will be enabled by default quite soon now. It is theoretically faster and more powerful than regex based grammars (the one described in this guide), but requires a steeper learning curve. My understanding is that regex based grammars will still be supported however (at least until version 2), so this guide can still be useful. To enable it yourself, go to Settings -> Core and check Use Tree Sitter Parsers

Links for tree-sitter help: