What's the highest value a signed integer can represent on your platform
(ie. 32 bit or 64 bit)?
|>:{.i:_j1
9223372036854775807
1 + |>:{.i:_j1 NB. Now floating-point
9.22337e18
-Dan
----- Original Message ---------------
Subject: Re: [Jchat] [Jprogramming] more fork examples
From: Devon McCormick <[email protected]>
Date: Fri, 24 Jan 2014 12:31:53 -0500
To: Chat forum <[email protected]>
What's 2147483647+1 in Julia?
On Fri, Jan 24, 2014 at 10:07 AM, Joe Bogner <[email protected]> wrote:
> My experience with python is that it's difficult to set up an scipy
> environment on windows. There are packaged solutions, like Anaconda[1]
> that simplify it greatly, but it's still a 340MB download. I've
> installed all the packages manually before and dealt with the
> dependencies. It probably took about an hour of trial and error. My
> install folder is 800MB
>
> It works well once it's up and running. I haven't had it break, but
> I'm also afraid to update anything. Fortunately, it's a relatively
> complete environment for what I'm using it for.
>
> I would not want to try and push it out to a team.
>
> R just works and it's package manager has never let me down. It's easy
> to update packages and the dependencies are resolved. It's generally
> fast enough for what I'm doing.
>
> I've played with Julia on and off over the past year and it's looking
> more and more like a useful platform. There wasn't a pre-built 64-bit
> binary as-of 6 months ago. It was released about 4 months ago. I read
> this article yesterday that re-invigorated my interest.
> http://www.evanmiller.org/why-im-betting-on-julia.html As a language
> geek, it's neat to see what's really happening under the hood. It's
> array handling is fairly clean
> (http://docs.julialang.org/en/latest/manual/arrays/)
>
>
> julia> [1 2 3] + 1
> 1x3 Array{Int32,2}:
> 2 3 4
>
> julia> [1 2 3] + [2 3 4]
> 1x3 Array{Int32,2}:
> 3 5 7
>
> This made me cringe... Probably a slightly nicer way to do it:
>
> julia> map(x->length(x) > 0 ? first(x) : -1, map((y) -> find((x) ->
> x==y,[1,2,3]
> ),[1,2,5,1]))
>
> 4-element Array{Int32,1}:
> 1
> 2
> -1
> 1
>
> Compared to
>
> (1 2 3) i. (1 2 5 1)
> 0 1 3 0
>
> Sidenote: (Julia arrays are 1-based and I substituted -1 instead of
> length for not found):
>
> That being said, it does have coroutines and worker processes,
> http://docs.julialang.org/en/latest/manual/parallel-computing/
>
> [1] - http://continuum.io/downloads
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
--
Devon McCormick, CFA
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