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Variable storage - Perl, Tcl and Python compared  From Monday to Wednesday, I was teaching Python to a group of delegates at a company where I have previously taught Tcl and Expect and Perl. And this interesting diagram shows just what a contrast there is between the three languages right from the start - in terms of how data is stored into variables!In Tcl, all data is stored a strings so the number 21 would be 2 bytes - the character 2 followed by the character 1. In Perl, you have a much more 'traditional' model where the name of the variable - which has a leading $ - may be considered to be a direct label on the storage element And in Python, everything is an object, so your variable name contains a reference to a location on the heap at which the data is stored. (written 2009-10-08 06:04:44) Associated topics are indexed under P103 - Perl - Variables and Operations[2876] Different perl examples - some corners I rarely explore - (2010-07-18) [1946] Variable Types in Perl - (2008-12-15) [1448] Question on division (Java) - Also Perl, PHP, Python ... - (2007-11-28) [1312] Some one line Perl tips and techniques - (2007-08-21) [748] Getting rid of variables after you have finished with them - (2006-06-06) T202 - Tcl/Tk - Tcl Fundamentals [1469] Curley brackets v double quotes - Tcl, Tk, Expect - (2007-12-12) [1426] Buffering up in Tcl - the empty coke can comparison - (2007-11-10) [1282] Stringing together Tcl scripts - (2007-07-29) [1136] Buffering output - why it is done and issues raised in Tcl, Perl, Python and PHP - (2007-04-06) [782] Converting between Hex and Decimal in Tcl - (2006-06-28) [362] The ireallyreallywanna operator - (2005-06-28) [349] Comments in Tcl - (2005-06-16) [328] Making programs easy for any user to start - (2005-05-29) [210] Joining lists in Tcl. Indirect variables in Tcl. - (2005-02-12) [3] Looking for a donkey - (2004-08-05) Y102 - Python - Fundamentals [2778] Learning to program in Python 2 ... and / or in Python 3 - (2010-05-24) [2368] Python - fresh examples of all the fundamentals - (2009-08-20) [1878] Pascals Triangle in Python and Java - (2008-11-10) [1461] Python - input v raw input - (2007-12-06) [1430] Integer v float - Python - (2007-11-12) [956] Python security - trouble with input - (2006-11-30) [633] Copying a reference, or cloning - (2006-03-05)
Some other Articles
Learn about MySQL stored proceduresSecuring MySQL on a production server Potted MySQL installation Contrasting Cambridge, Bristol and Wiltshire Variable storage - Perl, Tcl and Python compared Not your cup of tea? Optional parameters to Python functions Multiple returns from a function in Python Listening to The Minister Wiltshire Unitary News - Chamber of Commerce Intelligence |
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Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58 at 50 posts per pageThis 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.
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