Saving empty string value

Support
1

Can anyone suggest a fix to this?

FO2HZMt.png1259×991

The intent of the highlighted lines is that any subsequent run use the same input value of e.g. %artist% as the first. The effect is that where the input value was an empty string, it doesn't. It uses the value created by the liens below.

2

The action group needs the tag-field ARTIST to be exist, having any value?
Then preset the Filter: ARTIST PRESENT

... or ...
Preset CJJORIGTITLE with a standard text, when the tag-field TITLE is empty ...
Format value "CJJORIGTITLE": $if2(%CJJorigtitIe%,$if2(%TITLE%,'set any standard text here'))

DD.20140818.1732.CEST

3

No. It is needed to work if ARTIST exists with any value or if ARTIST does not exist.

(By standard test I presume you mean some arbitrary but reserved string.)

OK... and I guess then when I fetch the field, translate the standard text back to empty e.g. $regexp(%title%,'^set any standard text here$',)

I'll try it. Thanks D.

4

A string of one or more spaces may work.

DD.20140819.0938.CEST

5

For the standard string to work it must be reserved i.e. never occur as the actual incoming value of a field. So I think just spaces is risky. Best is perhaps e.g. "&^"£&"^&£^"&^£")(*"

6

Could be just some character/s from the set $char(1)..$char(31)
... or $char(9216) ␀
... or $char(9248) ␠
... or $char(9250) ␢
... or $char(9251) ␣
... etc.

DD.20140819.1424.CEST

7

Thanks D.

from the set $char(1)..$char(31)

Mp3tag shows improbable glyphs ...

... or $char(9216) ␀
... or $char(9248) ␠
... or $char(9250) ␢

and hollow boxes...

... or $char(9251) ␣

but there shows ␣ , so I think that's the safest. It tests OK on WMA, but I don't know about other formats.

BTW, for anyone like me looking for tricks to format a Creative ZEN display: all those characters are successful in affecting sort order, but appear as hollow block, rather than invisible. If anyone finds a sort-affecting character that is invisible, please do tell!