LiveCode Forums.

After a somewhat thorough search of this forum, I see lots of people recommending the use of "filter without space", but in a simple test for something I am doodling with at the moment, I still see a space in the variable I am using it on.

Open a message box, and put the following into the multi-line - The result line by line of this code is -

The message box wrote: the itemDelimiter is currently ","
Saturday, January 26, 2019 <- the long date...
2019-January <- item 3 of the long date which is supposed to have a space
Charcter 1 of the above line is 32 <- tells us that it is actually a space
After filter without space, charcter 1 of tmpArchive is 32

So the question is, why doesn't filter without space take that space out? What am I missing?

*Edit - so far, I have found this to be the case from 6.5.2 to 8.1.2, still going through previous versions.

Hi bogs,

no idea why filter does not work here, maybe need to provide more info (a regex)?
In the meantime use: Best

Klaus

Oh, I am sorry Klaus, I should have mentioned I already have a workaround done for this (I just deleted the first character in the variable). Your solution also works, as do many others I tried. Actually, I think yours may be the better of the two <scribbling it in>

The real problem here is, I believe that filter without space *should* have worked in this case, but obviously does not, and hasn't in fact worked in this case since at least 6.x. (still testing farther back, for all I know, this may be *inherited).

I wasn't able to find any bug reports about it either, so maybe my thinking is WAY off here, and this isn't how it is supposed to work

That is the main reason for the post, to find out if it *is* supposed to clear that space and should be reported as a bug, or if it is *not* supposed to clear that space, and what the reason that might be is, since it would seem to be contradictory to the way the language is used.

But thanks for the new line!

*Edit - apparently it is not inherited, as the last version of Mc doesn't actually include a filter 'without' option, only filter 'with' as far as I can tell

This is not a bug.
filter uses either

• a wildcard pattern
• a regex pattern

filter string without space
is a wildcard pattern that finds and excludes all lines that are exactly space
What you are looking for is
filter string without space&"*" -- finds and excludes all lines starting with a space

I actually tried that using this test code to see what would happen - You weren't kidding when you said it would exclude the line if it started with a space, but that presents a different problem. The main question here is how to get rid of only the space, we want to keep the rest of the characters in the variable.

So, is there a way to filter out only a space in a given string ?

To give a better example, say you had "temp o rary" in a variable, and wanted to take out the 2 spaces in the middle using filter without.

This is not a job for filter that targets lines, items, keys or elements of a string/array, not chars.

To handle replacing chars or substrings of a string you could use replace.
Or for more differential searches you could use replaceText.

Ah, I see, so my mistake is the assumption that 'space' would fall under the 'item' or 'element' of a string category and be able to be filtered out of a line, where as what filter actually would do in that case is take the entire line out if a space is contained therein.

Thank you Hermann, I sure didn't get that from the dictionary definition.

As a side note, I was creating some variables that started with multiple lines recently, which were weened down to a single line. For some reason though, I always found an empty line at the end of the variable

I assume that same type of statement is what you would use to actually remove lines that are empty?

I.e. when going through the forums, I always see it suggested as
when the complete code *should be* which should blip any empty line in a variable?

Hi bogs.

The wildcard char "*" stands for zero or more chars. So
removes all empty lines from variable var, whereas
removes ALL lines from variable var (results in an empty string).

Got it, thanks!