jashkenas

var active = false;

function changeRefer(details) {
  if (!active) return;
  
  for (var i = 0; i < details.requestHeaders.length; ++i) {
    if (details.requestHeaders[i].name === 'Referer') {
      details.requestHeaders[i].value = 'http://www.google.com/';
      break;
    }

paulirish

/* bling.js */
window.$ = document.querySelector.bind(document);
window.$$ = document.querySelectorAll.bind(document);
Node.prototype.on = window.on = function(name, fn) { this.addEventListener(name, fn); };
NodeList.prototype.__proto__ = Array.prototype;
NodeList.prototype.on = function(name, fn) { this.forEach((elem) => elem.on(name, fn)); };

pfultz2

#include <utility>
#include <iostream>

struct void_
{
    template<typename Stream>
    friend Stream &operator<<(Stream &s, void_)
    {
        return s << "()";
    }

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






\

ndarville

Grab ffmpeg from https://www.ffmpeg.org/download.html

It's a command line tool which means you will have to type things with your keyboard instead of clicking on buttons.

The most trivial operation would be converting gifs:

ffmpeg -i your_gif.gif -c:v libvpx -crf 12 -b:v 500K output.webm

• -crf values can go from 4 to 63. Lower values mean better quality.
• -b:v is the maximum allowed bitrate. Higher means better quality.

danharper

// this is the background code...

// listen for our browerAction to be clicked
chrome.browserAction.onClicked.addListener(function (tab) {
	// for the current tab, inject the "inject.js" file & execute it
	chrome.tabs.executeScript(tab.ib, {
		file: 'inject.js'
	});
});

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

paulsmith

/**
 * A simple preforking echo server in C.
 *
 * Building:
 *
 * $ gcc -Wall -o echo echo.c
 *
 * Usage:
 *
 * $ ./echo