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Lost Meta Tag Found! a Tango Tips & Tricks written by Chris Ogden 8/12/1999

We also posted this to the Tango Talk list... >PS. While we're on the subject of advanced array manipulation, you might also want to play around with @MAP @MAP has been around since May of 1998! It's a super-secret, never been documented, and unknown to all but a handful of people Tag... <@MAP ARRAY=array [VALUE='meta-expression']> The way I describe it is that it's like @FILTER, but with the ability to change the values of the items returned. One of the things I use for is to concatenate elements in an array and/or update prices. Two quick examples are listed below. The only problem is that it ONLY RETURNS A ONE COLUMN ARRAY (ie, it does NOT return the rest of the array). It only returns one column. However, if you really need to get around that, you could create a delimited string for each row and turn it back into array via a loop and @ADDROWS. Now if we only had @ADDCOLS and @DELCOLS! -c PS. In preparation for the Pervasive Partners conference, we're punching up our collection of our Tips, Tricks, & Free Stuff (or as someone said, "How to make Tango do things it wasn't supposed to be able to do"). If you'd like a copy when it's done, sign up on our mailing list. Anyway, here's some examples of @MAP at work: HR Info With Salaries: (Prefix - First Last - Salary - Bonus) <@assign local$salaries '<@ARRAY VALUE="Mr.,Bob,Smith,45000,1500;Ms.,Jennifer,McAuliffe,39000,3000;Dr.,Chris,McAuliffe,26000,5000">'> @@local$salaries Concatenate Names: <@MAP local$salaries value='#1 #2 #3'> Use @MAP's math and string manipulation... Give everyone who makes more than $40,000 three weeks of vacation, all else get 2: <@ASSIGN local$Vacation "<@MAP local$salaries value='<@IF "#4 + #5 > 40000" true="3 weeks (#1 #2 #3)" false="2 weeks (#1 #2 #3)">'>"> @@local$Vacation