Initial data commit

Task/String-matching/Wren/string-matching.wren

@@ -0,0 +1,18 @@
+var s = "abracadabra"
+var t = "abra"
+var u = "ra"
+var v = "cad"
+System.print("'%(s)' starts with '%(t)' is %(s.startsWith(t))")
+var indices = []
+var start = 0
+while (true) {
+    var ix = s.indexOf(u, start)
+    if (ix >= 0) {
+        indices.add(ix)
+        start = ix + u.count
+        if (start >= s.count) break
+    } else break
+}
+var contained = indices.count > 0
+System.print("'%(s)' contains '%(u)' is %(contained) %(contained ? "at indices %(indices)" : "")")
+System.print("'%(s)' ends with '%(v)' is %(s.endsWith(v))")