[Haskell-cafe] How to use Data.ByteString ?

[Brandon S. Allbery KF8NH]

On May 19, 2009, at 10:20 , Chaddaï Fouché wrote:
> On Tue, May 19, 2009 at 8:46 AM, Brandon S. Allbery KF8NH
> <allbery at ece.cmu.edu> 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 If
>>
>> Sure, 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] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH


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