September 2017 Update

Task/Combinations/Zkl/combinations-1.zkl

@@ -0,0 +1,9 @@
+fcn comb(k,seq){	// no repeats, seq is finite
+   seq=seq.makeReadOnly();	// because I append to parts of seq
+   fcn(k,seq){
+      if(k<=0)    return(T(T));
+      if(not seq) return(T);
+      self.fcn(k-1,seq[1,*]).pump(List,seq[0,1].extend)
+	   .extend(self.fcn(k,seq[1,*]));
+   }(k,seq);
+}

Task/Combinations/Zkl/combinations-2.zkl

@@ -0,0 +1 @@
+comb(3,"abcde".split("")).apply("concat")