ramesh4sr

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Calculate the detour distance between two different rides. Given four
 * latitude / longitude pairs, where driver one is traveling from point A to
 * point B and driver two is traveling from point C to point D, write a function
 * (in your language of choice) to calculate the shorter of the detour distances

dpaluy

# Git repository-specific solution 
# Source: http://unix.stackexchange.com/questions/36233/how-to-skip-file-in-sed-if-it-contains-regex/36240#36240
git grep -I --name-only -z -e '' | xargs -0 sed -i -e 's/[ \t]\+\(\r\?\)$/\1/'

rapimo

SELECT hstore(array_agg(v), array_agg(c::text)) FROM (
SELECT v, COUNT(*) as c ,1 as agg from  unnest(ARRAY['foo','bar','baz','foo']) v GROUP BY v) t
GROUP BY agg

--> "bar"=>"1", "baz"=>"1", "foo"=>"2"

jboner

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

williscool

Useful commands:

TODO: rearrange this to bottom = oldest and top = newst (2-27-2020) below dashed line

fix tmux resurrect

ln -f -s $(/bin/ls -t tmux_resurrect_*.txt | head -n 1) last

tmux useful comands

williscool

# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi

# enable forward search
# http://ruslanspivak.com/2010/11/25/bash-history-incremental-search-forward/
# https://bugs.launchpad.net/ubuntu/+source/bash/+bug/80635/comments/12
stty -ixon

erikh

#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

henrik242

#!/bin/bash

for arg; do [[ $arg = /* ]] || arg=$PWD/$arg; absargs+=("$arg"); done;
/Applications/P4Merge.app/Contents/Resources/launchp4merge "${absargs[@]}"

brow

Running redis using upstart on Ubuntu

I've been trying to understand how to setup systems from the ground up on Ubuntu. I just installed redis onto the box and here's how I did it and some things to look out for.

To install:

simme

# First install tmux
brew install tmux

# For mouse support (for switching panes and windows)
# Only needed if you are using Terminal.app (iTerm has mouse support)
Install http://www.culater.net/software/SIMBL/SIMBL.php
Then install https://bitheap.org/mouseterm/

# More on mouse support http://floriancrouzat.net/2010/07/run-tmux-with-mouse-support-in-mac-os-x-terminal-app/