if (length(substr($var, ' ')) eq length( $var)) {} might be considered as well.

Jeroen
"We are not alone"(FZ)

Update Read lemming's reply. Forget the substr approach. Luckily, I thought of another approach on the way home: 

if( $var eq ' ' x length($var) ) {...}

[download]
Should do the trick without regex or functions.

Yet another would be to use tr: 

if( $var eq map tr/A..Za..z0..9/ /, $var ) {..}

[download]
or make that 
if( $var eq map tr/\000..\277/ /, $var ) {..}

[download]
to be safe.

Update2: lemming's update hits it once more. I confused the foreach behavior with map's. Moreover, I should have evaluated in array context. Well, you get this: 

if($var  eq join '', map{ tr/\000..\177/ /c; $_; }  split '', $var ) {
+...}

[download]
This is tested and it works. Note the use of c to complement. I wouldn't use this myself, though.

In reply to Re: Handling undefined string content by jeroenes
in thread Handling undefined string content by akm2

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