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Smalltalk Daily 04/02/10: File Handling in Smalltalk

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James Robertson

Posts: 29924
Nickname: jarober61
Registered: Jun, 2003

David Buck, Smalltalker at large
Smalltalk Daily 04/02/10: File Handling in Smalltalk Posted: Apr 2, 2010 9:55 AM
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This post originated from an RSS feed registered with Agile Buzz by James Robertson.
Original Post: Smalltalk Daily 04/02/10: File Handling in Smalltalk
Feed Title: Cincom Smalltalk Blog - Smalltalk with Rants
Feed URL: http://www.cincomsmalltalk.com/rssBlog/rssBlogView.xml
Feed Description: James Robertson comments on Cincom Smalltalk, the Smalltalk development community, and IT trends and issues in general.
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Today's Smalltalk Daily is a basic introduction to file handling in Smalltalk, looking at class Filename, and at basic Stream protocol. Here's the code I used in the short examples in the screencast:


"Filename is your entry point into file handling"
(Filename named: '.') directoryContents.

"Read line by line"
list := List new.
stream := 'lines.txt' asFilename readStream.
[stream atEnd]
	whileFalse: [list add: stream nextLine].
stream close.


"more manually, to show stream protocol"
list := List new.
stream := 'lines.txt' asFilename readStream.
[[stream atEnd]
	whileFalse: [| next|
				next := stream upTo: Character cr.
				list add: next]]
ensure: [stream close].

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