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Make a grid using ImageMagick

posted by rajbot on May 23rd, 2007  

I needed a jpeg with gridlines on it. Here is a python script that will generate the arguments to ImageMagick to create a grid:

CLICK FOR PLAIN TEXT
PYTHON:
  1. #!/usr/bin/python
  2.  
  3. cmd = ‘convert -size 1000×1000 xc:white -strokewidth 1 ‘
  4.  
  5. for i in range(0, 999, 100):
  6.   cmd += “-draw ‘line “+str(i)+“,0 “+str(i)+“,999′ “
  7.  
  8. for i in range(0, 999, 100):
  9.   cmd += “-draw ‘line 0,”+str(i)+” 999,”+str(i)+“‘ “
  10.  
  11. cmd += “grid.jpg”
  12.  
  13. print cmd

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Example Scripts: REST web services and system calls

posted by rajbot on March 18th, 2007  

I’ve been translating all the new perl and php scripts I write into Python and Ruby in order to learn more about those two languages. I checked some more example scripts into SourceForge, which might be useful for others who know one of these languages and want to learn a new one.

These scripts are available in perl, php, python, and ruby:


The REST Web Service PHP and Perl scripts don’t work in Mac OS X, because OS X doesn’t ship with Perl’s XML::Simple or PHP’s simplexml. More surprisingly, OS X doesn’t ship with Perl’s LWP module.

I’m starting to like Ruby more every day. It would be nice if Ruby and Python had a XML::Simple equivalent in their standard distributions.

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Example scripts: directory listing in perl, php, python, and ruby

posted by rajbot on March 15th, 2007  

I remember when I fell in love with Perl. It was the summer of 1995, and peliom and I had just met, and were working at the Lab. Postscript hacking using MacPerl on OS 8. It was beautiful.

That was more than ten years ago, and even though I’ve remained a Perl hacker the whole time, I see massive amounts of development happening on Python and Ruby, and the Perl community seems to be slowing down (what’s up with Perl 6 anyway?), so, despite the lack of block-level scope, I think it might finally be time to move on.

I don’t know enough about either Python or Ruby to figure out which to learn, so I’ll learn them both, and deal with choosing one later. Along the way I’ll post some example scripts. Anyone else making the jump from Perl or PHP to something modern might find these useful. Here is the first example: printing out a directory listing using readdir and glob in your favorite scripting language:

(more…)

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