September 2017 Update

Task/Apply-a-callback-to-an-array/Simula/apply-a-callback-to-an-array.simula

@@ -0,0 +1,22 @@
+BEGIN
+
+    ! APPLIES A CALLBACK FUNCTION TO AN ARRAY ;
+    PROCEDURE APPLY(ARR, FUN);
+        REAL ARRAY ARR;
+        PROCEDURE FUN IS REAL PROCEDURE FUN(X); REAL X;;
+    BEGIN
+        INTEGER I;
+        FOR I := LOWERBOUND(ARR, 1) STEP 1 UNTIL UPPERBOUND(ARR, 1) DO
+            ARR(I) := FUN(ARR(I));
+    END APPLY;
+
+    ! CALLBACK ;
+    REAL PROCEDURE SQUARE(X); REAL X; SQUARE := X * X;
+
+    REAL ARRAY A(1:5);
+    INTEGER I;
+    FOR I := 1 STEP 1 UNTIL 5 DO A(I) := I;
+    APPLY(A, SQUARE);
+    FOR I := 1 STEP 1 UNTIL 5 DO OUTFIX(A(I), 2, 8); OUTIMAGE;
+
+END.