# Hov to convert pseudo hex to Int ? e.g. 'F' = 16

#1

Hov to conver pseudo hex to Int ?
I need convert
’1’ >1
’2’ >2

‘F’ >16
’G’ >17

julia> typeof(woj16)
Array{Any,1}

julia> typeof(woj16[1])
Char

julia> sort(unique(woj16))
16-element Array{Any,1}:
‘1’
‘2’
‘3’
‘4’
‘5’
‘6’
‘7’
‘8’
‘9’
‘A’
‘B’
‘C’
‘D’
‘E’
‘F’
‘G’

#2

If you do not need range checking you could write:

``````function c2i(c::Char)
c <= '9' && return c - '0'
c - '7'
end
``````

and now you can use it like:

``````x = ['1':'9'; 'A':'G']
c2i.(x)
``````

this is assuming that you want `'A'` to be converted to `10`, but then `'F'` is `15` not `16` as in your question.

#3
``````julia> x = ['1':'9'; 'A':'F']
15-element Array{Char,1}:
'1'
'2'
'3'
'4'
'5'
'6'
'7'
'8'
'9'
'A'
'B'
'C'
'D'
'E'
'F'

julia> parse.([Int], x, [16])
15-element Array{Int64,1}:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
``````

#4
``````function wev(c::Char)
'1' <= c <= '9' && return c - '0'
'A' <= c <= 'G' && return c - 'A' + 11
throw(DomainError())
end
``````