testing the existance of a file...
tim Rowledge
tim at rowledge.org
Wed Mar 15 20:11:30 UTC 2006
On 15-Mar-06, at 10:32 AM, Tom Phoenix wrote:
> On 3/15/06, nelson - <nelson1977 at gmail.com> wrote:
>
>> i can't figure out how to test the existance of a file.
>
> You can ask the directory whether it contains the file, if you send
> #fileExists: to an instance of FileDirectory.
>
> FileDirectory default fileExists: SmalltalkImage current
> sourcesName
You can also use
FileStream isAFileNamed:myfilenameinfull
or if you already know the directory for some reason
myDirectory isAFileNamed: localfilename
To be honest they're all awful. The fileExists: version actually
takes your path, splits it to work out which directory to pretend to
make, then reads *all* the filenames in that directory and then
scanns the list for a string match with the purported filename. The
isAFileNamed: version - aside from having a terrible name - actually
*opens the file* to try to get a prim fail asa way of deciding the
file doesn't exist. Good Grief.
We've been pontificating about Doing Something About This for a long
time. Lack of time available for the people that feel they have
better ideas (that would be people like me and Cees for example, the
IO Team)has so far prevented any real progress.
tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Klingon Code Warrior:- 2) "My program has just dumped Stova Core!"
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