ys4573’s blog

ref: google for the latest link.

They finally released it.

An OS heavily relies on the browser. I hoped firefox would be the browser, but seems google make it first on chrome.

If chrome (or chrome OS) is to be a success, most extensions currently available for firefox would be rewrite to run in chrome. Well, if they embed a terminal and an editor in the browser, and let everything runs reasonably fast, desktop has no choice but to fade out.

I wonder what RMS will say on the open-source browser based OS.

* predicted number of hours to complete 12
* actual number of hours to complete 12
* TestDarwin.out (as a page)

• predicted number of hours to complete 10
• actual number of hours to complete 11
• TestSudoku.out (as a page)

==21865== Memcheck, a memory error detector.
==21865== Copyright (C) 2002-2008, and GNU GPL’d, by Julian Seward et al.
==21865== Using LibVEX rev 1878, a library for dynamic binary translation.
==21865== Copyright (C) 2004-2008, and GNU GPL’d, by OpenWorks LLP.
==21865== Using valgrind-3.4.0, a dynamic binary instrumentation framework.
==21865== Copyright (C) 2000-2008, and GNU GPL’d, by Julian Seward et al.
==21865== For more details, rerun with: -v
==21865==
…………………..

OK (23)
==21865==
==21865== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 21 from 1)
==21865== malloc/free: in use at exit: 122,880 bytes in 6 blocks.
==21865== malloc/free: 1,060 allocs, 1,054 frees, 360,670 bytes allocated.
==21865== For counts of detected errors, rerun with: -v
==21865== searching for pointers to 6 not-freed blocks.
==21865== checked 125,432 bytes.
==21865==
==21865== LEAK SUMMARY:
==21865==    definitely lost: 0 bytes in 0 blocks.
==21865==      possibly lost: 0 bytes in 0 blocks.
==21865==    still reachable: 122,880 bytes in 6 blocks.
==21865==         suppressed: 0 bytes in 0 blocks.
==21865== Rerun with –leak-check=full to see details of leaked memory.

==7103== Memcheck, a memory error detector
==7103== Copyright (C) 2002-2009, and GNU GPL’d, by Julian Seward et al.
==7103== Using Valgrind-3.5.0-Debian and LibVEX; rerun with -h for copyright info
==7103== Command: ./build/test
==7103==
…………………………………………………………………………………………………………………………………..

OK (149)
==7103==
==7103== HEAP SUMMARY:
==7103== in use at exit: 0 bytes in 0 blocks
==7103== total heap usage: 3,411 allocs, 3,411 frees, 393,337 bytes allocated
==7103==
==7103== All heap blocks were freed — no leaks are possible
==7103==
==7103== For counts of detected and suppressed errors, rerun with: -v
==7103== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 21 from 6)

* predicted number of hours to complete: 8
* actual number of hours to complete: 10
* TestAllocator.out (as a page)

==4130== Memcheck, a memory error detector
==4130== Copyright (C) 2002-2009, and GNU GPL’d, by Julian Seward et al.
==4130== Using Valgrind-3.5.0-Debian and LibVEX; rerun with -h for copyright info
==4130== Command: ./build/test
==4130==
…………………………………….

OK (43)
==4130==
==4130== HEAP SUMMARY:
==4130== in use at exit: 0 bytes in 0 blocks
==4130== total heap usage: 3,085 allocs, 3,085 frees, 184,256 bytes allocated
==4130==
==4130== All heap blocks were freed — no leaks are possible
==4130==
==4130== For counts of detected and suppressed errors, rerun with: -v
==4130== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 21 from 6)

* predicted number of hours to complete: 8 hours
* actual number of hours to complete: 13 hours
* TestMatLab.out (as a page)

I’m tired of uploading files to cs machine and run turnin there, so I decide I need a wrapper script to help me do the job behind the scene.

lturnin has a core script named turnin and a documentation file README.

Major features:

* based on ssh and rsync, secure and fast.
* run locally, commit local files. that’s what the “l” means in lturnin.
* syntax compatible with orginal turnin
* short commands, grader aliases, homework patterns
* free software

This script won’t work on Windows, and I don’t have a plan to port it.
Please use a ssh key to login to cs machine, save lots of password inputs.

Sample usage:

  submit local files and dirs:
      turnin jgeorge cs109hw3 *.txt *.cpp *.h html
  list submitted files:
      turnin ls jgeorge cs109hw3

  make a pattern:
      turnin pattern cs109 jgeorge cs109hw
  submit using pattern:
      turnin cs109 3 *.txt
  list using pattern:
      turnin cs109 3

You can get the code from github:

    git clone git://github.com/sylecn/lturnin.git

If you don’t have git, you can also download it in zip or tar format, go to

    http://github.com/sylecn/lturnin

then click the download link.

CppUnit fixtures will be useful for writing tests for this project.

Check out the cookbook if you didn’t know how to use fixtures.