can you post randBinStr?  don't have an explanation, just curious.  the 
following seems fine:

julia> typeof([(x -> "a")(x) for x in 1:2])
Array{ASCIIString,1}

andrew

On Saturday, 29 March 2014 10:37:21 UTC-3, Andrew Dabrowski wrote:
>
> My function randBinStr produces a random string of 0s and 1s of given 
> length.
>
> julia> typeof( randBinStr(5) )
> ASCIIString (constructor with 1 method)
>
>
> julia> test = [ randBinStr(5) for i=1:2 ] 
> 2-element Array{Union(ASCIIString,UTF8String),1}:
>  "01110"
>  "00011"
>
>
> julia> map( typeof, test )
> 2-element Array{DataType,1}:
>  ASCIIString
>  ASCIIString
>
>
> Why does comprehension introduce the UTF*String into the type?
>
>

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