Data update

Task/String-concatenation/ArkScript/string-concatenation.ark

@@ -0,0 +1,6 @@
+(let s "hello")
+(print (+ s " world!"))
+
+(let w " there")
+(let v (+ s w))
+(print v)

Task/String-concatenation/Prolog/string-concatenation.pro

@@ -0,0 +1,9 @@
+:- set_prolog_flag(double_quotes, chars).
+
+println([]) :- write('\n').
+println([Char | Chars]) :- write(Char), println(Chars).
+
+:- S0 = "Hello, ",
+   S1 = "world!",
+   append(S0, S1, S),
+   println(S).

Task/String-concatenation/Tcl/string-concatenation-3.tcl

@@ -0,0 +1,6 @@
+set s "Hello"
+set w "World"
+set hw "$s $w"                ; #  "hello world"
+set hw [concat $s $w]         ; #  {hello world}, same as above
+set hw [string cat $s $w]     ; #  "helloworld"
+set hw [join [list $s $w] " "] ; #  "hello world"  \w space delimiter