Re: [julia-users] @sprintf variable length padding

[Stefan Karpinski]

Not currently supported via printf.

On Wed, Jul 20, 2016 at 10:32 AM, Tamas Papp  wrote:

> Thanks --- this is helpful for my particular problem, but I am still
> curious about how to do this with @sprintf (or whether it is currently
> not supported).
>
> Best,
>
> Tamas
>
> On Wed, Jul 20 2016, Stefan Karpinski wrote:
>
> > julia> lpad(12, 4, 0)
> > "0012"
> >
> > On Wed, Jul 20, 2016 at 9:05 AM, Tamas Papp  wrote:
> >
> >> Hi,
> >>
> >> how can I @sprintf an integer i padded to length l with zeros, where l
> >> is not a constant? Current workaround is
> >>
> >> printpad(i, l) = mapreduce(string, *, reverse(digits(i, 10, l)))
> >>
> >> julia> printpad(12, 4)
> >> "0012"
> >>
> >> but I could not figure out how to do this with @sprintf. If my
> >> understanding of printf syntax is correct, something like
> >>
> >> @sprintf("%*d", 4, 12)
> >>
> >> should do the trick, but in Julia it is an invalid format string.
> >>
> >> Best,
> >>
> >> Tamas
> >>
>
>

Re: [julia-users] @sprintf variable length padding

[Tamas Papp]

Thanks --- this is helpful for my particular problem, but I am still
curious about how to do this with @sprintf (or whether it is currently
not supported).

Best,

Tamas

On Wed, Jul 20 2016, Stefan Karpinski wrote:

> julia> lpad(12, 4, 0)
> "0012"
>
> On Wed, Jul 20, 2016 at 9:05 AM, Tamas Papp  wrote:
>
>> Hi,
>>
>> how can I @sprintf an integer i padded to length l with zeros, where l
>> is not a constant? Current workaround is
>>
>> printpad(i, l) = mapreduce(string, *, reverse(digits(i, 10, l)))
>>
>> julia> printpad(12, 4)
>> "0012"
>>
>> but I could not figure out how to do this with @sprintf. If my
>> understanding of printf syntax is correct, something like
>>
>> @sprintf("%*d", 4, 12)
>>
>> should do the trick, but in Julia it is an invalid format string.
>>
>> Best,
>>
>> Tamas
>>

Re: [julia-users] @sprintf variable length padding

[Stefan Karpinski]

julia> lpad(12, 4, 0)
"0012"

On Wed, Jul 20, 2016 at 9:05 AM, Tamas Papp  wrote:

> Hi,
>
> how can I @sprintf an integer i padded to length l with zeros, where l
> is not a constant? Current workaround is
>
> printpad(i, l) = mapreduce(string, *, reverse(digits(i, 10, l)))
>
> julia> printpad(12, 4)
> "0012"
>
> but I could not figure out how to do this with @sprintf. If my
> understanding of printf syntax is correct, something like
>
> @sprintf("%*d", 4, 12)
>
> should do the trick, but in Julia it is an invalid format string.
>
> Best,
>
> Tamas
>

[julia-users] @sprintf variable length padding

[Tamas Papp]

Hi,

how can I @sprintf an integer i padded to length l with zeros, where l
is not a constant? Current workaround is

printpad(i, l) = mapreduce(string, *, reverse(digits(i, 10, l)))

julia> printpad(12, 4)
"0012"

but I could not figure out how to do this with @sprintf. If my
understanding of printf syntax is correct, something like

@sprintf("%*d", 4, 12)

should do the trick, but in Julia it is an invalid format string.

Best,

Tamas