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Intel corner
End of the line
How to handle line endings correctly across platforms
Issue: 5.4 (May/June 2007)
Author: Christian Schmitz
Article Description: No description available.
Article Length (in bytes): 4,096
Starting Page Number: 44
RBD Number: 5417
Resource File(s): None
Related Link(s): None
Known Limitations: None
Excerpt of article text...
Overview
You may have seen the "endOfLine" keyword in REALbasic. Actually, it is a class with a global function returning the global endOfLine object. Because endOfLine is a class, you can write:
dim e as EndOfLine
e=new EndOfLine
MsgBox str(asc(e.Macintosh)) // shows "13"
The global function "EndOfLine as EndOfLine" will return to you an object of this endOfLine class. The object reference is cached so on each call you get the same endOfLine object. Now this endOfLine class has some operator methods which let you use it like a string. See this example:
MsgBox "Something interesting"+EndOfLine+EndOfLine+"which needs some details"
We just treat the endOfLine object returned by the endOfLine function as a string and add it to the message text passed to msgBox. Now if you do that the endOfLine object will be the platform dependent endOfLine string. On Linux it returns chr(10), on Mac OS chr(13), and on Windows chr(13)+chr(10).
In the Unix world (which is where Linux comes from), the line end character has always been chr(10), called LF or line feed. On Mac OS Classic the line end character is chr(13), called Carriage Return or just CR. The DOS operating . It uses CR and LF together. First it moves the printer header to the beginning of the printing line before shifting the paper a bit higher. Windows Vista still uses a line ending of CRLF.
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Article copyrighted by REALbasic Developer magazine. All rights reserved.
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