2011/5/3 Cédric Beust ♔ <ced...@beust.com> > > > > On Tue, May 3, 2011 at 4:16 AM, Kevin Wright <kev.lee.wri...@gmail.com>wrote: > >> There was a code style which stated null checks should have taken the >>> form of if (null == variable) which coming from Java I said was >>> unnecessary however it turns out that due to .net support for implicit >>> casts there are some fringe cases where if (variable == null) will >>> behave differently to if (null == variable) apparently. Most of the >>> developers used if (variable == null) though in spite of the coding >>> standard because it was more intuitive. >>> >>> >> I think this originates with checks against literal values instead of >> against null when using value instead of reference equality. >> > > No, I think this comes from the fact that C++ allows assignments in > expressions, therefore you can write: > > if (a = NULL) ... > > when you actually mean > > if (a == NULL) ... > > Reversing the arguments avoids this pitfall. Obviously, this is not > necessary in Java. >
ah-hah, yes, that old chestnut! Why did anyone ever think that assignment should look so much like asserting equality? It never fails to cause problems... > -- > Cédric > > -- > You received this message because you are subscribed to the Google Groups > "The Java Posse" group. > To post to this group, send email to javaposse@googlegroups.com. > To unsubscribe from this group, send email to > javaposse+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/javaposse?hl=en. > -- Kevin Wright gtalk / msn : kev.lee.wri...@gmail.com <kev.lee.wri...@gmail.com>mail: kevin.wri...@scalatechnology.com vibe / skype: kev.lee.wright quora: http://www.quora.com/Kevin-Wright twitter: @thecoda "My point today is that, if we wish to count lines of code, we should not regard them as "lines produced" but as "lines spent": the current conventional wisdom is so foolish as to book that count on the wrong side of the ledger" ~ Dijkstra -- You received this message because you are subscribed to the Google Groups "The Java Posse" group. To post to this group, send email to javaposse@googlegroups.com. To unsubscribe from this group, send email to javaposse+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/javaposse?hl=en.
