Rosetta Code/Rank languages by number of users

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Revision as of 21:13, 17 December 2017 by Eoraptor (talk | contribs)
Rosetta Code/Rank languages by number of users is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Sort most popular programming languages based on the number of users on Rosetta Code. Show the languages with at least 100 users.

A way to solve the task:

Users of a language X are those referenced in the page https://rosettacode.org/wiki/Category:X_User, or preferably https://rosettacode.org/mw/index.php?title=Category:X_User&redirect=no to avoid redirections. In order to find the list of such categories, it's possible to first parse the entries of http://rosettacode.org/mw/index.php?title=Special:Categories&limit=5000. Then download and parse each language users category to count the users.

Sample output on 17 december 2017: 

Language	Users  Rank
C               373       1
C++             261       2
Java            257       3
Python          243       4
JavaScript      186       5
PHP             163       6
Perl            162       7
SQL             131       8
UNIX Shell      120       9
C sharp         113      10
Pascal          109      11
BASIC           102      12

A Rosetta Code user usually declares using a language with the mylang template. This template is expected to appear on the User page. However, in some cases it appears in a user Talk page. It's not necessary to take this into account. For instance, among the 373 C users in the table above, 3 are actually declared in a Talk page.

Stata

<lang stata>copy "http://rosettacode.org/mw/index.php?title=Special:Categories&limit=5000" categ.html, replace import delimited categ.html, delim("@") enc("utf-8") clear keep if ustrpos(v1,"/wiki/Category:") & ustrpos(v1,"_User") gen i = ustrpos(v1,"href=") gen j = ustrpos(v1,char(34),i+1) gen k = ustrpos(v1,char(34),j+1) gen s = usubstr(v1,j+7,k-j-7) replace i = ustrpos(v1,"title=") replace j = ustrpos(v1,">",i+1) replace k = ustrpos(v1," User",j+1) gen lang = usubstr(v1,j+1,k-j) keep s lang gen users=.

forval i=1/`c(N)' { local s preserve copy `"https://rosettacode.org/mw/index.php?title=`=s[`i']'&redirect=no"' `i'.html, replace import delimited `i'.html, delim("@") enc("utf-8") clear count if ustrpos(v1,"/wiki/User") local m `r(N)' restore replace users=`m' in `i' erase `i'.html }

drop s gsort -users lang list if users>=100 save rc_users, replace</lang>

Output 

     +---------------------+
     |        lang   users |
     |---------------------|
  1. |          C      373 |
  2. |        C++      261 |
  3. |       Java      257 |
  4. |     Python      243 |
  5. | JavaScript      186 |
     |---------------------|
  6. |        PHP      163 |
  7. |       Perl      162 |
  8. |        SQL      131 |
  9. | UNIX Shell      120 |
 10. |    C sharp      113 |
     |---------------------|
 11. |     Pascal      109 |
 12. |      BASIC      102 |
     +---------------------+
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