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Textjoin in a sequence within a range

Time：01-11

I'm trying to textjoin a range with a delimiter:

Is there a way to textjoin this into a sequence every 3 cells within a range

I know I can do it with: A1&B1&C1&"-" etc. but my range is too great for that A until XXX and I need to ignore blank cells within that range

CodePudding user response：

Simple:

=TEXTJOIN({"","","-"},TRUE,A1:I1)