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Renames split to distribute. Refs #1084.

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This commit is contained in:
Grzegorz Adam Hankiewicz
2014-04-13 10:50:27 +02:00
parent fac9947ebe
commit c3cb03c640
1 changed files with 29 additions and 28 deletions
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57
lib/pure/collections/sequtils.nim
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@@ -88,14 +88,14 @@ proc zip*[S, T](seq1: seq[S], seq2: seq[T]): seq[tuple[a: S, b: T]] =
newSeq(result, m)
for i in 0 .. m-1: result[i] = (seq1[i], seq2[i])
proc split*[T](s: seq[T], num: int, spread = true): seq[seq[T]] =
## Splits a sequence `s` into `num` sub sequences.
proc distribute*[T](s: seq[T], num: int, spread = true): seq[seq[T]] =
## Splits and distributes a sequence `s` into `num` sub sequences.
##
## Returns a sequence of `num` sequences. For some input values this is the
## inverse of the `concat <#concat>`_ proc. The proc will assert in debug
## builds if `s` is nil or `num` is less than one, and will likely crash on
## release builds. The sequence `s` can be empty, which will produce `num`
## empty sequences.
## release builds. The input sequence `s` can be empty, which will produce
## `num` empty sequences.
##
## If `spread` is false and the length of `s` is not a multiple of `num`, the
## proc will max out the first sub sequences with ``1 + len(s) div num``
@@ -110,10 +110,10 @@ proc split*[T](s: seq[T], num: int, spread = true): seq[seq[T]] =
##
## .. code-block:: nimrod
## let numbers = @[1, 2, 3, 4, 5, 6, 7]
## assert numbers.split(3) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
## assert numbers.split(3, false) == @[@[1, 2, 3], @[4, 5, 6], @[7]]
## assert numbers.split(6)[0] == @[1, 2]
## assert numbers.split(6)[5] == @[7]
## assert numbers.distribute(3) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
## assert numbers.distribute(3, false) == @[@[1, 2, 3], @[4, 5, 6], @[7]]
## assert numbers.distribute(6)[0] == @[1, 2]
## assert numbers.distribute(6)[5] == @[7]
assert(not s.isNil, "`s` can't be nil")
assert(num > 0, "`num` has to be greater than zero")
if num < 2:
@@ -485,29 +485,30 @@ when isMainModule:
nums.mapIt(it * 3)
assert nums[0] + nums[3] == 15
block: # split tests
block: # distribute tests
let numbers = @[1, 2, 3, 4, 5, 6, 7]
doAssert numbers.split(3) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
doAssert numbers.split(6)[0] == @[1, 2]
doAssert numbers.split(6)[5] == @[7]
doAssert numbers.distribute(3) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
doAssert numbers.distribute(6)[0] == @[1, 2]
doAssert numbers.distribute(6)[5] == @[7]
let a = @[1, 2, 3, 4, 5, 6, 7]
doAssert a.split(1, true) == @[@[1, 2, 3, 4, 5, 6, 7]]
doAssert a.split(1, false) == @[@[1, 2, 3, 4, 5, 6, 7]]
doAssert a.split(2, true) == @[@[1, 2, 3, 4], @[5, 6, 7]]
doAssert a.split(2, false) == @[@[1, 2, 3, 4], @[5, 6, 7]]
doAssert a.split(3, true) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
doAssert a.split(3, false) == @[@[1, 2, 3], @[4, 5, 6], @[7]]
doAssert a.split(4, true) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
doAssert a.split(4, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
doAssert a.split(5, true) == @[@[1, 2], @[3, 4], @[5], @[6], @[7]]
doAssert a.split(5, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7], @[]]
doAssert a.split(6, true) == @[@[1, 2], @[3], @[4], @[5], @[6], @[7]]
doAssert a.split(6, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7], @[], @[]]
doAssert a.split(8, false) == a.split(8, true)
doAssert a.split(90, false) == a.split(90, true)
doAssert a.distribute(1, true) == @[@[1, 2, 3, 4, 5, 6, 7]]
doAssert a.distribute(1, false) == @[@[1, 2, 3, 4, 5, 6, 7]]
doAssert a.distribute(2, true) == @[@[1, 2, 3, 4], @[5, 6, 7]]
doAssert a.distribute(2, false) == @[@[1, 2, 3, 4], @[5, 6, 7]]
doAssert a.distribute(3, true) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
doAssert a.distribute(3, false) == @[@[1, 2, 3], @[4, 5, 6], @[7]]
doAssert a.distribute(4, true) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
doAssert a.distribute(4, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
doAssert a.distribute(5, true) == @[@[1, 2], @[3, 4], @[5], @[6], @[7]]
doAssert a.distribute(5, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7], @[]]
doAssert a.distribute(6, true) == @[@[1, 2], @[3], @[4], @[5], @[6], @[7]]
doAssert a.distribute(6, false) == @[
@[1, 2], @[3, 4], @[5, 6], @[7], @[], @[]]
doAssert a.distribute(8, false) == a.distribute(8, true)
doAssert a.distribute(90, false) == a.distribute(90, true)
var b = @[0]
for f in 1 .. 25: b.add(f)
doAssert b.split(5, true)[4].len == 5
doAssert b.split(5, false)[4].len == 2
doAssert b.distribute(5, true)[4].len == 5
doAssert b.distribute(5, false)[4].len == 2
echo "Finished doc tests"