For 2023 (and 2024 ...) - we are now fully retired from IT training. We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.
Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!
I am also active in many other area and still look after a lot of web sites - you can find an index ((here)) |
Disassembling Python and Java - previously compiled code
Most modern languages translate the source code you give into an intermediate byte code prior to it being run, and in can sometimes be useful and instructive to reverse engineer the code to help to understand what's going on within the more arcane elements of the language. Some languages actually provide tools to help you ...
In Python, the dis (for disassemble) module provides the functionality - see [here] for an example. In java, the javap utility with a -c option does the job for you. For Lua, disassembers such as luadec are available third party, and it gets very interesting with PHP, Ruby and Perl, assuming you even have the compiled code available. (written 2011-01-29, updated 2011-02-10)
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles Y150 - Python Development Tools and Environments [316] Development Environments - (2005-05-19) [745] Python modules. The distribution, The Cheese Shop and the Vaults of Parnassus. - (2006-06-05) [2123] Using Python with OpenOffice - (2009-04-09) [2370] C++, Python, and other training - do we use an IDE - (2009-08-21) [2452] Making executable binaries in Python (or Perl) - (2009-10-12) A502 - Web Application Deployment - Java - Basic Tools [754] tar, jar, war, ear, sar files - (2006-06-10) [1082] Straight from the .jar - (2007-02-16) [1192] What are WEB-INF and META-INF directories? - (2007-05-18) [1562] Java Compiler - needs all classes, compiles them all too - (2008-03-03) [1771] More HowTo diagrams - MySQL, Tomcat and Java - (2008-08-24) [1909] javax.servlet cannot be resolved - how to solve - (2008-11-26) [2153] Class Loading and Variable Conversion in Java - (2009-05-02) [2422] Looking inside Java classes - javap and javadoc - (2009-09-25) [2859] Using java, javac, jar, and CLASSPATH - a simple example - (2010-07-07) [3819] Packing a tar, jar or war file - best practise - (2012-07-26) [4412] Java -making sure you have the right versions - (2015-02-02)
Some other Articles
Rake - a build system using code written in RubyChanging a class later on - RubyPoints West to BelfastJargon bustingDisassembling Python and Java - previously compiled codePython dictionaries - mutable and immutable keys and valuesLooking back at www.wellho.netOpenGL / C / C++ - an example to get you startedHotel star ratings - towards a better system of reviewStrings in C
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This is a page archived from The Horse's Mouth at
http://www.wellho.net/horse/ -
the diary and writings of Graham Ellis.
Every attempt was made to provide current information at the time the
page was written, but things do move forward in our business - new software
releases, price changes, new techniques. Please check back via
our main site for current courses,
prices, versions, etc - any mention of a price in "The Horse's Mouth"
cannot be taken as an offer to supply at that price.
Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).
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