On May 19, 2009, at 10:20 , Chaddaï Fouché wrote:
On Tue, May 19, 2009 at 8:46 AM, Brandon S. Allbery KF8NH <[email protected]> wrote:On May 19, 2009, at 01:42 , Jason Dagit wrote:I've often seen this bit of scary code in VB: Dim i as Integer = 5 If i = "5" Then ' Do something, because 5 = "5" End IfSure, that works in Perl too.That's because in numeric context Perl convert strings into numbers, so even 5 == "5 coffees" would be true... But 5 eq "5 coffees" wouldn't since eq force a string context and 5 is converted to "5"
If you use == instead of eq then it will emit a warning and then find them equal. This is something of a common logic error in Perl.
-- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [email protected] system administrator [openafs,heimdal,too many hats] [email protected] electrical and computer engineering, carnegie mellon university KF8NH
PGP.sig
Description: This is a digitally signed message part
_______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
