Variable-length quantity: Difference between revisions

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@@ Line 1,256: / Line 1,256: @@
 =={{header|Nim}}==
-<lang nim>import unsigned, strutils
+<lang nim>import strformat
 proc toSeq(x: uint64): seq[uint8] =
   var x = x
-  result = @[]
+  var f = 0u64
+  for i in countdown(9u64, 1):
-  var f = 0
+    if (x and 127'u64 shl (i * 7)) > 0:
-  for i in countdown(9, 1):
-    if (x and (127'u64 shl uint((i * 7)))) > 0'u64:
       f = i
       break
-  for j in 0..f:
+  for j in 0u64..f:
-    result.add(uint8((x shr uint64((f - j) * 7)) and 127) or 128)
+    result.add uint8((x shr ((f - j) * 7)) and 127) or 128
   result[f] = result[f] xor 128'u8
-proc fromSeq(xs): uint64 =
+proc fromSeq(xs: openArray[uint8]): uint64 =
-  result = 0
   for x in xs:
     result = (result shl 7) or (x and 127)
@@ Line 1,279: / Line 1,277: @@
 x200000'u64, 0x3311a1234df31413'u64]:
   let c = toSeq(x)
-  echo "seq from $#: $# back: $#".format(x, c, fromSeq(c))</lang>
+  echo &"seq from {x}: {c} back: {fromSeq(c)}"</lang>
-Output:
+{{out}}
 <pre>seq from 127: @[127] back: 127
 seq from 16384: @[129, 128, 0] back: 16384