deepak

T0 = Thread.main

t1 = Thread.new(Thread.current) { |x| Thread.current[:parent] = x; sleep 1_00_000; }
t2 = Thread.new(Thread.current) { |x| Thread.current[:parent] = x; sleep 1_00_000; }

(t1[:parent] == t2[:parent]) && (t1[:parent] == T0)

__END__

# to find out the parent of a thread, ie. was spawned by which thread 

nefarioustim

// Do the maths
for(
    var sum = 0, i = 1;
    i < 1000;
    !(i % 3 && i % 5) && (sum += i), i++
);
// Log the result
console.log(sum);

rstacruz

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

piscisaureus

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:

tony4d

Download and install p4merge

• Download the perforce visual tool suite from here: http://www.perforce.com/perforce/downloads/index.html
• Copy only the p4merge.app file into your /Applications/ directory

Setup p4merge as a visual mergetool

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

tlberglund

#!/bin/bash

while :
do
    clear
    git --no-pager log --graph --pretty=oneline --abbrev-commit --decorate --all $*
    sleep 1
done

keyboardr

public class ContentListFragment extends ListFragment implements LoaderCallbacks<List<Content>>{
  @Override
  public void onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    return inflater.inflate(R.layout.layout, container, false);
  }
  
  @Override
  public void onViewCreated(View view, Bundle savedInstanceState){
   super.onViewCreated(view, savedInstanceState);
   getLoaderManager().initLoader(0, null, this);

Daniel15

Google Drive File Picker Example

This is an example of how to use the Google Drive file picker and Google Drive API to retrieve files from Google Drive using pure JavaScript. At the time of writing (14th July 2013), Google have good examples for using these two APIs separately, but no documentation on using them together.

Note that this is just sample code, designed to be concise to demonstrate the API. In a production environment, you should include more error handling.

See a demo at http://stuff.dan.cx/js/filepicker/google/