Sorry, got busy and forgot to reply to this.
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Originally Posted by BetterRed
@chaley - thanks, yes, the new backend did speed up composite columns, I was able to reinstate one that I had previously removed because it was having an adverse effect on performance - so far so good.
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Good to hear.
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The three formats_xxx functions work fine in Book Information as I envisaged. Would be good if one could optionally specify a format eg formats_size('EPUB'), formats_modtimes('MM/dd/yyyy', 'AZW3')
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You can do this by composing two functions. "select" and the formats_ function you want to use. Example:
Code:
program: select(formats_modtimes('yyyy-MM-dd'), 'EPUB')
returns the date the EPUB was modified, or the empty string if there isn't an EPUB. Note that the key in "select" is case sensitive.
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BTW : the PDF version of the manual has a 'misprint', see attachment, shows up in 4 viewers, Firefox, Chrome, XChange and Foxit. I think its been there for a while.
BR
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Oh well. To paraphrase Kovid when he replies to bug reports involving PDF, "PDF has various limitations".