Rosetta Code/Rank languages by popularity: Difference between revisions
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echo "GET http://www.rosettacode.org/w/index.php?title=Special:Categories&limit=500 HTTP/1.0\n\n" |
echo "GET http://www.rosettacode.org/w/index.php?title=Special:Categories&limit=500 HTTP/1.0\n\n" |
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| nc www.rosettacode.org 80 |
| nc www.rosettacode.org 80 |
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| sed -ne '/[0-9]+ +members?/p' |
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⚫ | |||
| sort -rn |
| sort -rn |
Revision as of 16:15, 15 February 2009
You are encouraged to solve this task according to the task description, using any language you may know.
Sort most popular programming languages based in number of members in Rosetta Code categories (from http://www.rosettacode.org/w/index.php?title=Special:Categories&limit=500)
Output:
1. 246 - Programming_Tasks 2. 203 - Python 3. 201 - Ada 4. 188 - OCaml 5. 171 - Perl 6. 169 - Java 7. 168 - Haskell 8. 157 - C 9. 141 - Forth 10. 140 - Ruby ...
Filtering wrong results is optional. You can check against http://www.rosettacode.org/wiki/Special:MostLinkedCategories
Python
Works with: Python 2.6
<lang python>import urllib import re
def key1(x):
return int(x.split()[0])
a = urllib.urlopen("http://www.rosettacode.org/w/index.php?title=Special:Categories&limit=500")
entries = []
for line in a:
match = re.search('>([^<>]*)</a> \((\d+) members?\)', line) if match: entries.append(match.group(2) + ' - ' + match.group(1))
a.close()
for c, line in enumerate(sorted(entries, key=key1, reverse=True),start=1):
print "%3d. %s" % (c, line)</lang>
Ruby
<lang ruby>require 'open-uri'
entries = []
open("http://www.rosettacode.org/w/index.php?title=Special:Categories&limit=500") do |f|
for line in f match = line.match(%r{>([^<>]*)</a> \((\d+) members?\)}) entries << match[2] + ' - ' + match[1] if match end
end
entries.sort_by {|x| -x.to_i}.each_with_index do |line, c|
puts "%3d. %s" % [c+1, line]
end</lang>
UnixPipes
echo "GET http://www.rosettacode.org/w/index.php?title=Special:Categories&limit=500 HTTP/1.0\n\n" | nc www.rosettacode.org 80 | sed -n -e 's,<[^>]*>,,g' -e's,^\([^(]*\)(\([^)]*\) members*) *,\2 - \1,g' -e'/^[0-9]\+./p' | sort -rn