Hello,
On Dec 2 14:36 Arvin Schnell wrote (shortened):
On Wed, Dec 02, 2009 at 02:22:06PM +0100, Johannes Meixner wrote:
Hello,
is such code allowed:
--------------------------------------------------------------------
list < string > words = [ "Jane", "John" ];
integer index = -1;
foreach( string word,
words,
{ index = index + 1;
words[index] = "Hello " + word;
}
);
--------------------------------------------------------------------
Is in any case the result words == [ "Hello Jane", "Hello John" ] ?
Use maplist:
words = maplist(string word, words, { return "Hello " + word; });
Regardless of maplist/mapmap:
Is my above code using foreach allowed?
My actual case is a bit more complicated like:
-----------------------------------------------------------------------
list < string > words = [ "Jane", "World", "John" ];
integer index = -1;
foreach( string word,
words,
{ index = index + 1;
if( "World" == word )
{ words[index] = "Hello " + word;
}
}
);
-----------------------------------------------------------------------
Is in any case the result words == [ "Jane", "Hello World", "John" ] ?
Assume the list is huge.
Wouldn't then
-----------------------------------------------------------------------
words = maplist( string word,
words,
{ if( "World" == word )
{ return "Hello " + word;
}
else
{ return word;
}
}
);
-----------------------------------------------------------------------
consume unnecessarily much memory and CPU (two lists and
all elements are copied instead of "in place" modification
only where needed via foreach)?
Kind Regards
Johannes Meixner
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