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Last month I blogged about Literate Programming with jMock, and also about using anaphora to avoid repetition in the tests. (An anaphor is a word like it that refers to something previously referred to.) This got me thinking: is it possible to use anaphora more widely at the language level? Would such constructs be useful? Before trying to do this in Java I looked at more dynamic languages,...
on Jun 29, 2006
Anders Møller's dk.brics.automaton is a Java regex package whose main claim to fame is that it is significantly faster then all other Java regex libraries, including the java.util.regex classes in the JDK. Like many things in computer science, the speed gains come at a price. In this case, the regular expression language supported is not as rich as the Perl 5 syntax that...
on Mar 27, 2006
There is an old saying that mathematicians only know three numbers: 0, 1 and ∞ (infinity). There is some truth in this in computing too, as dealing with a single entity can be very different to dealing with a multiplicity of that entity. In JDK 1.5 speak: Am I using a Thing or a Collection<Thing>? It is possible to build a system using single entities at each level of the...
on May 30, 2005
Perl is famous for its one-liners. By using the -e command line switch you can execute the script supplied as an argument. But the real power comes when you use -p (to process each line of a supplied file), and -i (to modify the file in place). The classic example is to perform search and replace on a bunch of files. The following will replace all occurrences of curious george with the gruffalo...
on Apr 18, 2005