Time for an 2014 update…

Task/Array-concatenation/AWK/array-concatenation.awk

@@ -1,19 +1,19 @@
 #!/usr/bin/awk -f
 BEGIN {
-    split("cul-de-sac",a,"-");
-    split("1-2-3",b,"-");
+    split("cul-de-sac",a,"-")
+    split("1-2-3",b,"-")
     concat_array(a,b,c)
 
     for (i in c) {
-        print i,c[i];
+        print i,c[i]
     }
 }
 
 function concat_array(a,b,c) {
     for (i in a) {
-        c[++nc]=a[i];	
+        c[++nc]=a[i]	
     }
     for (i in b) {
-       c[++nc]=b[i];	
+       c[++nc]=b[i]	
     }
 }

Task/Array-concatenation/Elena/array-concatenation.elena

@@ -1,9 +1,9 @@
-#define extensions'io.
+#define extensions.
 
 #symbol program =
 [
     #var a := (1,2,3).
     #var b := (4,5).
 
-    consoleEx write:"(" write::a write:") + (" write::b write:") = (" write::(a + b) writeLine:")".
+    consoleEx writeLine:"(":a:") + (":b:") = (":(a + b):")".
 ].