Data update

Task/String-matching/EasyLang/string-matching.easy

@@ -0,0 +1,23 @@
+func starts s$ t$ .
+   if substr s$ 1 len t$ = t$
+      return 1
+   .
+   return 0
+.
+func ends s$ t$ .
+   if substr s$ (len s$ - len t$ + 1) len t$ = t$
+      return 1
+   .
+   return 0
+.
+func contains s$ t$ .
+   for i to len s$ - len t$ + 1
+      if substr s$ i len t$ = t$
+         return 1
+      .
+   .
+   return 0
+.
+print starts "hello world" "he"
+print ends "hello world" "rld"
+print contains "hello world" "wo"