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#!/usr/bin/lua
--check if version is supported
--why 5.3? utf8 and 64bit support
if (_VERSION ~= "Lua 5.3" ) then
print "Wrong lua versions"
print "Supported 5.3 only"
os.exit(1)
end
--open file
utf8_file = io.open( "test/teabook.txt", "r" )
if ( utf8_file == nil) then
print "Couldnot open file"
os.exit(1)
end
--read contect in utf8
--l = utf8_file:read("*l")
hier_table = {}
for line in utf8_file:lines() do
for p,c in utf8.codes( line ) do
if hier_table[c] == nil then
hier_table[c] = 1
else
hier_table[c] = hier_table[c] + 1
end
end
end
hier_table_sorted = {}
for k,v in pairs(hier_table) do
table.insert( hier_table_sorted, {ch=k,val=v})
end
function cmpa( a,b )
if a.val ~= nil and b.val ~= nil then
return a.val > b.val
end
end
table.sort( hier_table_sorted, cmpa )
for k,v in ipairs(hier_table_sorted) do
print(utf8.char(v.ch), "=",hier_table[v.ch] )
end
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