double nA = pow ( sin(nDLat/2), 2 ) + cos(nLat1) * cos(nLat2) * pow ( sin(nDLon/2), 2 );
double nC = 2 * atan2( sqrt(nA), sqrt( 1 – nA ));

with the slightly simpler

double nA = haversin(nDLat) + cos(nLat1) * cos(nLat2) * haversin(nDLon);
double nC = 2 * asin( sqrt(nA) );

I have no idea what Kiichi is talking about.
The Wikipedia: Earth radius article points out that the radius various from 6,357 km to 6,378 km, and suggests that if you must choose one particular value, “6371 km” is a good mean value.

#!/bin/bash
# This script depends on a file named p4config being in the “root” directory
# For example, /Code/Flash/main/p4config has the following content:
# P4ROOT=/Code/Flash/main
# P4PORT=my.server.name:1666
# P4CLIENT=myclient
# P4USER=me
# P4PASSWD=mypassword
# Here is what the Perforce docs say about p4config:
#Contains a file name without a path. The file(s) it points to are used to store other Perforce environment or registry variables. The current working directory (returned by PWD) and its parents are searched for the file. If the file exists, then the variable settings within the file are used.

export P4CONFIG=”p4config”

# The next two lines get a path that resolves any ../ elements
# because p4 cannot handle them.
FILE=%%%{PBXFilePath}%%%
ABS_FILE=`pwd`/${FILE##*/}

/usr/local/bin/p4 edit $ABS_FILE

# If success, swap to Finder and back so Xcode notices the file is unlocked
if [ $? = 0 ]; then
open -a Finder
open -a Xcode $ABS_FILE
fi

Actually, my co-worker warned me of that already. Thankfully, the project I was working with, or I should say projects, were all non-production stuff, each one which had at least 5 targets…

So, you see I had motivation to use the nasty approach instead of the click-click-double-click-times-300 approach.

Earth’s radius in Kilometers
6372.797

for better precision.