It’s not that easy at all, everytime I do it I have to look up the docs 
But the docs are well written though 
sztosz
0
Hal9000
I do feel silly for not knowing that procedure. I will figure that out later,
as I am pressed for time right now.
If anyone wants to take this on, the changes are very small. I’ll paste
code (kernel.ex) and tests here.
Hal
@doc ~S"""
`rand/0` returns a (pseudo)random number between 0 and 1.
`rand/1` can take a range as a parameter, returning an integer
from that range.
"""
@spec rand() :: float
def rand, do: :rand.uniform
@spec rand(Range.t) :: integer
def rand(n1..n2) when is_integer(n1) and is_integer(n2) do
:rand.uniform(n2 - n1 + 1) + n1 - 1
end
test "rand/0" do
x = rand()
assert is_float(x)
assert x >= 0.0
assert x <= 1.0
end
test "rand/1" do
n = rand(10..20)
assert is_integer(n)
assert n >= 10
assert n <= 20
end
0
josevalim
Creator of Elixir
No worries, I have incorporated your changes to master here: Add Kernel.rand/0 and Kernel.rand/1 · elixir-lang/elixir@786da1f · GitHub
2
hubertlepicki
Is it boring for me to repeat that you are increadibly good in making people contribute to Elixir? I mean, you don’t even have to know pull request flow to do so, awesome!
@Hal9000 for the future you may want to learn the procedure however. It’s both easier for the maintainer and you get some respect badge in the hood by being listed on official contributor’s list (as in here: Contributors to elixir-lang/elixir · GitHub). If maintainer just copies the code, you are not listed (although in this particular case @josevalim was kind enough to mention you in the commit description!). Some people may care about this detail, others not, just letting you know 
2
Hal9000
Hubert speaks truth @josevalim is awesome on more than one level.
I will certainly learn this procedure for next time.
As for contributors’ list – if I ever contribute 1,000 lines of code, I will
care more. I’m grateful to be mentioned, but I wouldn’t ask for mention
for 20 or so LOC.
Cheers,
Hal
0
OvermindDL1
Yeah Jose is truly awesome. It is so pleasant to be around a BDFL that speaks so nicely. ^.^
1
hubertlepicki
I have a personal theory that in fact there are at least 3 @josevalim’s. You never know who is on the other end, since the visual contact is so rare. It’s physically impossible for one person to do so many awesome things.
1
sztosz
Hey does anyone knows what happend to this? I can’t find rand on master branch elixir/lib/elixir/lib/kernel.ex at main · elixir-lang/elixir · GitHub nor 1.4 branch it seems that it was added here: Add Kernel.rand/0 and Kernel.rand/1 · elixir-lang/elixir@786da1f · GitHub and removed here: Remove Kernel.rand/0 and Kernel.rand/1 · elixir-lang/elixir@8e2a1e5 · GitHub
@josevalim: Was it meant to be reintroduced with random name instead of rand and somehow did not because someone people just forget things? Or was there more to the story of removal of that code?
1
josevalim
Creator of Elixir
The reason is in the commit message, Enum.random/1 already provides the functionality, so we decided to stick with it.
1
But thank you very much for answer.