Data update

Task/Optional-parameters/ALGOL-68/optional-parameters.alg

@@ -24,12 +24,18 @@ BEGIN
     # do the sort .... #
 END # configurable sort # ;
 
-# example calls #
-[ 1 : 2, 1 : 3 ]STRING data := ( ( "a", "bb", "cde" ), ( "x", "abcdef", "Q" ) );
+BEGIN # example calls #
+    [ 1 : 2, 1 : 3 ]STRING data := ( ( "a", "bb", "cde" ), ( "x", "abcdef", "Q" ) );
 
-# sort data, default comparison, first column, reverse order #
-configurable sort( data, ( TRUE ) );
-# sort data, second column, ignore first chaacter when sorting, normal order #
-configurable sort( data, ( 2, ( STRING a, STRING b )INT: default compare( a[ LWB a + 1 : ], b[ LWB b + 1 : ] ) ) );
-# default sort #
-configurable sort( data, () )
+    # sort data, default comparison, first column, reverse order #
+    configurable sort( data, ( TRUE ) );
+    # sort data, second column, ignore first chaacter when sorting, normal order #
+    configurable sort( data, ( 2
+                             , ( STRING a, STRING b )INT: default compare( a[ LWB a + 1 : ]
+                                                                         , b[ LWB b + 1 : ]
+                                                                         )
+                             )
+                     );
+    # default sort #
+    configurable sort( data, () )
+END

Task/Optional-parameters/V-(Vlang)/optional-parameters.v

@@ -0,0 +1,20 @@
+struct Params {
+	a int // default value is 0
+	b int
+	c int = 20
+}
+
+fn a_fn(p Params) int {
+    return p.a + p.b + p.c
+}
+
+fn main() {
+    w := a_fn(Params{a: 1, b: 2, c: 3}) // same order, with new value given to `c`
+    println("w = ${w}")
+    x := a_fn(Params{c: 3, b: 2, a: 1}) // different order
+    println("x = ${x}")
+    y := a_fn(Params{c: 2}) // only one field
+    println("y = ${y}")
+	z := a_fn(Params{}) // no fields, so given value of `c` and default values used
+    println("z = ${z}")
+}