LZW compression: Difference between revisions

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=={{header|Julia}}==

<lang julia>function compressLZW(decompressed::String)

dictsize = 256

dict = Dict{String,Int}(string(Char(i)) => i for i in ~~range(~~0, dictsize))

dict = Dict{String,Int}(string(Char(i)) => i for i in 0:dictsize)

result = Vector{Int}(0)

result = Vector{Int}(undef, 0)

w = ""

for c in decompressed

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return result

end

function decompressLZW(compressed::Vector{Int})

dictsize = 256

dict = Dict{Int,String}(i => string('\0' + i) for i in ~~range(~~0, dictsize))

dict = Dict{Int,String}(i => string('\0' + i) for i in 0:dictsize)

result = IOBuffer()

w = string(Char(~~shift~~!(compressed)))

w = string(Char(popfirst!(compressed)))

write(result, w)

for k in compressed

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w = entry

end

return String(result)

return String(take!(result))

end

original = ["0123456789", "TOBEORNOTTOBEORTOBEORNOT", "dudidudidudida"]

compressed = compressLZW.(original)

decompressed = decompressLZW.(compressed)

for (word, comp, decomp) in zip(original, compressed, decompressed)

comprate = (length(word) - length(comp)) / length(word) * 100

println("Original: $word\n-> Compressed: $comp (compr.rate: $(round(comprate, 2))%)\n-> Decompressed: $decomp")

println("Original: $word\n-> Compressed: $comp (compr.rate: $(round(comprate, digits=2))%)\n-> Decompressed: $decomp")

end</lang>