| For development it may be useful to be able to replay TCP traffic (e.g. HTTP). The dump can be created using WireShark or tcpdump: | |
| $ tcpdump -s 0 port http -i en0 -w dump.pcap | |
| To generate data files that can be replayed through netcat we use tcptrace: | |
| $ tcptrace -e input.pcapng | |
| Finally replay the HTTP traffic using netcat to host 192.168.1.1 port 80 | |
| $ cat a2b_contents.dat | nc -v 192.168.1.1 80 | |
| If you need to replay the raw network traffic, we need to do some massaging using tcpprep and tcprewrite before using tcpreplay to replay the raw packages. Note that due to limitation of tcprewrite this will not replay any traffic to the network: http://tcpreplay.synfin.net/wiki/FAQ#Doestcpreplaysupportsendingtraffictoaserver. |
MATLAB code to demonstrate [Fourier series][1] representation of periodic signals (as a sum of sinusoidal functions).
The animation shows an approximation of a square wave signal using the first 4-terms of its Fourier series. (Change the parameters near the top of the code to manipulate the animations and explore other variations).
![animation1][6] ![animation2][7]
This was inspired by the following similar animations:
| Agnes en_US # Isn't it nice to have a computer that will talk to you? | |
| Albert en_US # I have a frog in my throat. No, I mean a real frog! | |
| Alex en_US # Most people recognize me by my voice. | |
| Alice it_IT # Salve, mi chiamo Alice e sono una voce italiana. | |
| Alva sv_SE # Hej, jag heter Alva. Jag är en svensk röst. | |
| Amelie fr_CA # Bonjour, je m’appelle Amelie. Je suis une voix canadienne. | |
| Anna de_DE # Hallo, ich heiße Anna und ich bin eine deutsche Stimme. | |
| Bad News en_US # The light you see at the end of the tunnel is the headlamp of a fast approaching train. | |
| Bahh en_US # Do not pull the wool over my eyes. | |
| Bells en_US # Time flies when you are having fun. |
| // http://nikhilm.github.io/uvbook/threads.html | |
| #include <string> | |
| #include <map> | |
| #include <node.h> | |
| #include <v8.h> | |
| #include <uv.h> | |
| #include <sys/syscall.h> | |
| #include <stdlib.h> |
A design rationale.
For the past fews years, the Web has been shifting control to the client. Given the limitations of remote services, developers are now looking for ways to "unhost" static applications – that is, break the dependency on remote servers while still using the Web platform.
One untapped technology for client-side control is the Web Worker Sandbox. This API lets the Page load, execute, and destroy separate Worker threads which use their own Virtual Machines. By using Worker Sandboxes to drive behavior, the Web can give users the choice of which software they run together, shifting development from a centralized SaaS model into a distributed and free (as in freedom) script-sharing model.
Worker Sandboxes can Execute Arbitrary Code
| { | |
| "C0": 16.35, | |
| "C#0": 17.32, | |
| "Db0": 17.32, | |
| "D0": 18.35, | |
| "D#0": 19.45, | |
| "Eb0": 19.45, | |
| "E0": 20.60, | |
| "F0": 21.83, | |
| "F#0": 23.12, |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE> | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE |
(Also see [remarkable][], the markdown parser created by the author of this cheatsheet)
| /** | |
| * Converts an RGB color value to HSL. Conversion formula | |
| * adapted from http://en.wikipedia.org/wiki/HSL_color_space. | |
| * Assumes r, g, and b are contained in the set [0, 255] and | |
| * returns h, s, and l in the set [0, 1]. | |
| * | |
| * @param Number r The red color value | |
| * @param Number g The green color value | |
| * @param Number b The blue color value | |
| * @return Array The HSL representation |
