Data update

Task/Menu/Langur/menu.langur

@@ -1,18 +1,19 @@
-val choose = impure fn(entries) {
+val choose = fn*(entries) {
     if entries is not list: throw "invalid args"
     if not entries: return ""
 
     # print the menu
-    writeln join("\n", map(fn e, i: "{{i:2}}: {{e}}", entries, 1..len(entries)))
+    writeln join(map(entries, 1..len(entries), by=fn e, i:"{{i:2}}: {{e}}"), by="\n")
 
     val idx = read(
-        "Select entry #: ",
-        fn(x) {
+        prompt="Select entry #: ",
+        validation=fn(x) {
             if not x -> RE/^[0-9]+$/: return false
             val y = x -> number
             y > 0 and y <= len(entries)
         },
-        "invalid selection\n", -1,
+        errmsg="invalid selection\n",
+        maxattempts=-1,
     ) -> number
 
     entries[idx]