Question

Friend, How can open a txt file in Squeak4.1 ,the code Shall be like this:

at: #f put: (FileStream  open: '/root/test'  mode: FileStream read) !
f do: [ :c | Transcript nextPut: c ] !
f close !

can any body give some hints on how to open the file and do the + – * / equation ?
thanks first 🙂

Answer 1

I’d use one of these methods…

fileContents := FileStream 
                   readOnlyFileNamed: '/root/test' 
                   do: [:f | f contents ].

Using the block form above automatically closes the file, you can’t forget. Or..

fileContents := (FileStream readOnlyFileNamed: '/root/test') 
                    contentsOfEntireFile.

#contentsOfEntireFile also automatically closes the file, you don’t need to do it again.

In a language with blocks, it just makes no sense to manually close the stream when higher order methods are available that ensure you don’t have to do so.