Re: [NoW] About numeric for-loop

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

• Subject: Re: [NoW] About numeric for-loop
• From: "Soni \"They/Them\" L." <fakedme@...>
• Date: 2019年1月17日 12:11:07 -0200

---

On 2019年01月17日 11:52 a.m., Albert Chan wrote:

function loop(e1,e2,e3)

 local i, n = -1, math.floor((e2-e1)/e3)
 if e1 + n * e3 == e2 then n = n+1 end
 return function()
 i = i + 1
 if i < n then return e1 + i*e3 end
 end
end

Uh ... above can be simplified:
function loop(e1, e2, e3)
 local i, n = -1, (e2-e1)/e3
 return function()
 i = i + 1
 if i <= n then return e1 + i*e3 end
 end
end

See also the implementation details of https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html

---

• References:
  • [NoW] About numeric for-loop, Egor Skriptunoff
  • Re: [NoW] About numeric for-loop, Dirk Laurie
  • Re: [NoW] About numeric for-loop, Albert Chan
  • Re: [NoW] About numeric for-loop, Albert Chan

• Prev by Date: Re: [NoW] About numeric for-loop
• Next by Date: Re: Pattern matching among multiple chunks
• Previous by thread: Re: [NoW] About numeric for-loop
• Next by thread: Re: [NoW] About numeric for-loop
• Index(es):
  • Date
  • Thread