WebReflection

update

I've created a little repository that simply exposes the final utility as npm module.

It's called html-escaper

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there is basically one rule only: do not ever replace one char after another if you are transforming a string into another.

domenic

Embedders of V8 should generally use the head of the branch corresponding to the minor version of V8 that ships in Chrome.

Finding the minor version of V8 corresponding to the latest stable Chrome

To find out what version this is,

1. Go to https://omahaproxy.appspot.com/
2. Find the latest stable Chrome version in the table
3. Enter it into the "Translate a Chrome verison to a V8 version" box below the table.
4. Ignore the last two parts.

igrigorik

Navigation and Resource Timing provides timing data for the fetch, but currently there is no interoperable way for the server to communicate own timing information to the client. For example:

• What steps were taken to generate the resource, and how long each took. Many sites already embed this type of information via HTML comments - e.g. wordpress emits <!--Page generated in X.X seconds.--> , and many sites provide more detailed stats (cache, db, generation) to enable performance debugging.
• If proxied, where was the time spent - e.g. time to fetch from origin, time to process response, etc.

Instead of relying on arbitrary HTML comments, we can define an HTTP header that can be used to send key-value pairs in a well defined format. Making this data available via a well defined interface would...

• Allow UA and other developer tools to automatically annotate appropriate timelines.
• Allow analytics vendors to gather this data for operational analysis.
• Allows proxies and CDNs to append custom timing d

trevnorris

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0

iainmcgin

(function() {
  // request PerformanceResourceTiming info for all resources on the page
  var resources = window.performance.getEntriesByType('resource');

  // filter all resources to just +1 button iframes with timing information
  var p1Resources = resources.filter(function(rtInfo) {
    return rtInfo.name.indexOf('_/+1/fastbutton') != -1 &&
           rtInfo.responseStart != 0;
  });

mraleph

$ cat test.js
function foo () { while (true) { } }
function bar () { return foo(); }
bar();
$ node test.js &
$ gdb attach $(pidof node)
0x00000bf778c63d5f in ?? ()
(gdb) b v8::internal::Runtime_StackGuard
Breakpoint 1 at 0x84a1f0
(gdb) print 'v8::V8::TerminateExecution'(0)

madrobby

sudo apt-get update
sudo apt-get install libfreetype6 libfreetype6-dev libfontconfig 

# /etc/apt/sources.list should contain these:
# deb http://us.archive.ubuntu.com/ubuntu/ lucid multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ lucid multiverse
# deb http://us.archive.ubuntu.com/ubuntu/ lucid-updates multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ lucid-updates multiverse

sudo echo ttf-mscorefonts-installer msttcorefonts/accepted-mscorefonts-eula select true | sudo debconf-set-selections

hemanth

I have marked with a * those which I think are absolutely essential Items for each section are sorted by oldest to newest. Come back soon for more!

BASH

• In bash, 'ctrl-r' searches your command history as you type

• Add "set -o vi" in your ~/.bashrc to make use the vi keybindings instead of the Emacs ones. Takes some time to get used to, but it's fantastic!
• Input from the commandline as if it were a file by replacing 'command < file.in' with 'command <<< "some input text"'
• '^' is a sed-like operator to replace chars from last command

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

defunctzombie

The spec has moved to a repo: https://github.com/defunctzombie/package-browser-field-spec to facilitate collaboration.