Crawling sequantial images with shell script

2012-12-19

Let say you want to download from http://www.domain.com/images/, and you know that the images name is from 001 to 100

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How $_POST store array elements in PHP

2012-12-08

Sometime we need an array form elements like this

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<input type="text" name="foo[]" value="a" />
<input type="text" name="foo[3]" value="b" />
<input type="text" name="foo[]" value="c" />
<input type="text" name="foo[7]" value="d" />

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OS X failed bundle install

2012-12-08

When I try to setup octopress in OS X, I run bundle install, it always come out an error like:

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$ bundle install
Fetching gem metadata from http://rubygems.org/.......
Fetching gem metadata from http://rubygems.org/..
/Users/jslim/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler.rb:263: warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
Using rake (0.9.2.2) 
Installing RedCloth (4.2.9) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/bin/ruby extconf.rb 
checking for main() in -lc... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
    --with-opt-dir
    --without-opt-dir
    --with-opt-include
    --without-opt-include=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/Users/jslim/.rvm/rubies/ruby-1.9.3-p327/bin/ruby
    --with-redcloth_scan-dir
    --without-redcloth_scan-dir
    --with-redcloth_scan-include
    --without-redcloth_scan-include=${redcloth_scan-dir}/include
    --with-redcloth_scan-lib
    --without-redcloth_scan-lib=${redcloth_scan-dir}/lib
    --with-clib
    --without-clib
/Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:369:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:449:in `try_link0'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:464:in `try_link'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:607:in `try_func'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:833:in `block in have_library'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:778:in `block in checking_for'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:272:in `block (2 levels) in postpone'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:242:in `open'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:272:in `block in postpone'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:242:in `open'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:268:in `postpone'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:777:in `checking_for'
    from /Users/jslim/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:828:in `have_library'
    from extconf.rb:5:in `<main>'


Gem files will remain installed in /Users/jslim/.rvm/gems/ruby-1.9.3-p327/gems/RedCloth-4.2.9 for inspection.
Results logged to /Users/jslim/.rvm/gems/ruby-1.9.3-p327/gems/RedCloth-4.2.9/ext/redcloth_scan/gem_make.out
An error occurred while installing RedCloth (4.2.9), and Bundler cannot continue.
Make sure that `gem install RedCloth -v '4.2.9'` succeeds before bundling.

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ls command in OS X

2012-12-08

ls by default in OS X has no --group-directories-first

Open up your terminal

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$ brew install coreutils

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Delete Linux partition from dual-boot (Windows 7 &amp; Linux)

2012-11-30

First time I did this by just delete the partition via Disk Management on Windows 7. What is the consequence?

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Switch Fedora 17 to classic mode

2012-11-27

Although the OS that I like the most is Ubuntu 11.04. Unfortunately, a lot of new packages or drivers were not supported. Thus, I give myself to try on other distro — Fedora 17

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Setup Subversion server with HTTP on Ubuntu 11.04

2012-11-25

Install Apache server and subversion

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$ sudo apt-get install apache2 subversion libapache2-svn

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Embed GVIM into Eclipse with Eclim on Ubuntu

2012-11-24

Eclim allowed us to embed Vim into Eclipse.

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JDK installation on Ubuntu

2012-11-22

There may have many ways to install Java on Ubuntu. However, in this example I’ll show the manual way which is download the JDK from the official website.

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