> I suppose this is related to + and - being unary operators?
Ding ding. Unfortunately space being the horizontal concatenation operator
means some operations parse very differently and in highly
whitespace-sensitive ways depending whether they are inside or outside an
array literal. Would be nice if that were not the case, but I think we'd
need another delimiter character aside from , or ; to really separate
horizontal concatenation from vertical concatenation from list construction.
julia> j=2; [ 1 +j ]
1x2 Array{Int64,2}:
1 2
julia> j=2; [ 1 + j ]
1-element Array{Int64,1}:
3
julia> j=2; 1 +j
3
julia> j=2; 1 + j
3
On Thursday, March 5, 2015 at 4:56:20 PM UTC-8, Amuthan A. Ramabathiran
wrote:
>
> Not sure if this has been discussed earlier... can someone explain whats
> happening here?
>
> julia> b = [ 1 +j for j = 1:5 ]
> ERROR: syntax: invalid comprehension syntax
>
> julia> b = [ 1 + j for j = 1:5 ]
> 5-element Array{Int64,1}:
> 2
> 3
> 4
> 5
> 6
>
>
> This happens with both + and -, but not with * or /. I suppose this is
> related to + and - being unary operators?
>
> Thanks!
> Amuthan.
>
