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Full Discussion: passing object to function, columns class
Top Forums Programming passing object to function, columns class Post 302513194 by Corona688 on Tuesday 12th of April 2011 02:35:42 PM
Old 04-12-2011
Keeping them as vectors but not using 2/3 of the vector positions is very wasteful. Why have all those different types anyway, instead of one class that contains a string and has operators to return float, int, char? It'd let you keep everything in one vector.

Why do you store each and every row in a vector when you don't need them later? Why not process the row then discard it?

Quote:
I would like to make processing a function where I would add a row to the string stream, select a target variable in the class for the parsed data to go, and pass the stringstream and the target to a loading function.
I don't understand this at all, but I think I sort of get your pseudocode -- you want to load data from a string.

Well, you already have a function that loads strings, though it opens files and reads lines to get the strings. You could make a more general-purpose string loading member function that's used by your file loader and external things alike.

If you really wanted to process stringstreams, you could do that with your existing file-loading code, since stringstreams act just like file streams. You just need to make everything more general: A function that loads from a stream, which your file-opening member could use too, instead of just one member which loads from a filename and nothing else.
 

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LEARN ABOUT REDHAT

snap2tzx

snap2tzx(1)							     Emulators							       snap2tzx(1)

NAME

       snap2tzx - Convert ZX Spectrum snapshot to .tzx tape images

SYNOPSIS

       snap2tzx [-1 string] [-2 string] [-b colour] [-g string] [-l string] [-o filename] [-r] [-s speed] [-v] [-$ filename] snapshot
DESCRIPTION

       snap2tzx converts a ZX Spectrum snapshot into a .tzx tape image.

OPTIONS

       -1 string
	      causes string (which has a maximum of 32 characters) to be shown while loading.

       -2 string
	      causes string (maximum 32 characters) to also be shown while loading.

       -b colour
	      specifies the border colour while loading.

       -g string
	      causes string (maximum 32 characters) to be used as the game name while loading.

       -l string
	      causes string (maximum 8 characters) to be used as the BASIC filename in the loader.

       -o filename
	      causes the output to be sent to filename.

       -r     causes the final line of attribute data in the loading screen to be bright.

       -s speed
	      specifies the speed of the loader; available values for speed are 0 (1500 bps), 1 (2250 bps), 2 (3000 bps) and 3 (6000 bps).

       -v     specifies verbose output.

       -$ filename
	      specifies that the ZX Spectrum screen stored in filename should be used as the loading screen.

       snapshot
	      specifies the snapshot (in a format supported by libspectrum(3)) to be converted.

       In any string parameter, the tilde (~) will be converted into a copyright symbol.

BUGS

       None known.

SEE ALSO

       fuse(1), fuse-utils(1), libspectrum(3), listbasic(1), snapconv(1)

       The comp.sys.sinclair Spectrum FAQ, at
       http://www.worldofspectrum.org/faq/index.html.

AUTHOR

       Philip Kendall (philip-fuse@shadowmagic.org.uk).

       Tomaz  Kac  wrote  z802tzx  (ftp://ftp.worldofspectrum.org/pub/sinclair/tools/unix/z802tzx-1.2.tar.gz),	on  which snap2tzx is very heavily
       based.

       Martijn van der Heide wrote the turbo-loading code, originally for Taper (http://www.worldofspectrum.org/taper.html).

Version 1.0.0							16th December, 2010						       snap2tzx(1)
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