Data commit

Task/Repeat/Jq/repeat-1.jq

@@ -0,0 +1,4 @@
+def unoptimized_repeat(f; n):
+  if n <= 0 then empty
+  else f, repeat(f; n-1)
+  end;

Task/Repeat/Jq/repeat-2.jq

@@ -0,0 +1,5 @@
+def repeat(f; n):
+  # state: [count, in]
+  def r:
+    if .[0] >= n then empty else (.[1] | f), (.[0] += 1 | r) end;
+  [0, .] | r;

Task/Repeat/Jq/repeat-3.jq

@@ -0,0 +1,9 @@
+# If n is a non-negative integer,
+# then emit a stream of (n + 1) terms: ., f, f|f, f|f|f, ...
+def repeatedly(f; n):
+  # state: [count, in]
+  def r:
+    if .[0] < 0 then empty
+    else .[1], ([.[0] - 1, (.[1] | f)] | r)
+    end;
+  [n, .] | r;

Task/Repeat/Jq/repeat-4.jq

@@ -0,0 +1 @@
+0 | [ repeat(.+1; 3) ]

Task/Repeat/Jq/repeat-5.jq

@@ -0,0 +1 @@
+0 | repeatedly(.+1; 3)