Associative array/Merging: Difference between revisions

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 Uses the associative array implementations in [[ALGOL_68/prelude]].
 <lang algol68># associative array merging                                                  #
 # the modes allowed as associative array element values - change to suit     #
 MODE AAVALUE = UNION( STRING, INT, REAL );
 # the modes allowed as associative array element keys - change to suit       #
 MODE AAKEY   = STRING;
+# initial value for an array element                                         #
+AAVALUE init element value = "";
 # include the associative array code                                         #
 PR read "aArrayBase.a68" PR
 # adds or replaces all elements from b into a                     #
 PRIO UPDATE = 9;
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     a
 END # UPDATE # ;
 # construct the associative arrays for the task                   #
 REF AARRAY a := INIT LOC AARRAY;