Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!virtech!cpcahil
From: cpcahil@virtech.UUCP (Conor P. Cahill)
Newsgroups: comp.lang.c
Subject: Re: Test of possible ACSGATE on net
Message-ID: <1282@virtech.UUCP>
Date: 16 Oct 89 01:06:38 GMT
References: <16103@nswitgould.cs.uts.oz>
Organization: Virtual Technologies Inc
Lines: 39

In article <16103@nswitgould.cs.uts.oz>, garth_kidd%680.808@fidogate.fido.oz (Garth Kidd) writes:
> Can anyone think of a tighter way of coding a filter to strip spaces 
> from the input stream than this?
>  
> main()
> {
>   char ch;
>  
>   for(;read(0,&ch,1)==1;write(1,&ch,(ch==' ')?0:1))
>     ;
> }


If by "tighter" you mean better performing the following would 
outdo yours by probably an order of magnitude:

	#include <stdio.h>

	main()
	{
		int ch;

		while( (ch=getchar()) != EOF)
		{
			if( ch != ' ' )
			{
				putchar(ch);
			}
		}
	}

Actually, my "order of magnitude" estimation is incorrect.  Processing
90K of data using your program took 53 seconds of cpu time, while the
example I gave took .4 seconds (more like 2 orders of magnitude).
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| Conor P. Cahill     uunet!virtech!cpcahil      	703-430-9247	!
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