Data commit

Task/Substring-Top-and-tail/Vala/substring-top-and-tail.vala

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+// declare test string
+string s = "Hello, world!";
+// remove first letter
+string s_first = s[1:s.length];
+//remove last letter
+string s_last = s[0:s.length - 1];
+// remove first and last letters
+string s_first_last = s[1:s.length - 1];