Sunday, February 22, 2009

The names behind the languages

If we're going to continue to spill blood in these language wars, it's important that we all know who our generals are (and who our enemy generals are). Feel free to offer corrections or extensions to the list.

C - Dennis Ritchie







Perl - Larry Wall
 








Monday, January 19, 2009

Venn Diagrams with google charts

I recently had the need to view some data sets as venn diagrams, so I found google's chart api and hacked out a little AJAX application to do so, you can try it out here. And, for the fun of it, a VERY simple Python implementation:



import urllib
from PIL import Image
import StringIO

def venn_diagram_url(a, b, c, width=400, height=200):
values = [width, height, len(a), len(b), len(c)]
values.append(len(a & b))
values.append(len(a & c))
values.append(len(c & b))
values.append(len(a & b & c))
base_str = 'http://chart.apis.google.com/chart?'
args_str = 'cht=v&chs=%sx%s&chd=t:%s,%s,%s,%s,%s,%s,%s'
return base_str + (args_str % tuple(values))

a = set((1, 2, 3))
b = set((2, 4))
c = set((3, 4, 5))

data = StringIO.StringIO(urllib.urlopen(venn_diagram_url(a, b, c)).read())
Image.open(data).show()


Not much to it... But maybe someone will find it useful.