Selectively replace multiple instances of a character within a string: Difference between revisions

=={{header|Julia}}==

<lang ruby>

rep = Dict('a' => Dict(1 => 'A', 2 => 'B', 4 => 'C', 5 => 'D'), 'b' => Dict(1 => 'E'), 'r' => Dict(2 => 'F'))

function trstring(string, repdict)

seen, newchars = Dict{Char, Int}(), Char[]

for c in string

i = get!(seen, c, 1)

push!(newchars, haskey(repdict, c) && haskey(repdict[c], i) ? repdict[c][i] : c)

seen[c] += 1

end

return String(newchars)

end

trstring("abracadabra", rep)

<lang>