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I have a file with 450,000+ rows of entries. Each entry is about 7 characters in length. What I want to know is the unique characters of this file.
For instance, if my file were the following;
Entry ----- Yabba Dabba Doo
Then the result would be
Unique characters: {abdoy}
Notice I don't care about case and don't need to order the results. Something tells me this is very easy for the Linux folks to solve.
Update
I'm looking for a very fast solution. I really don't want to have to create code to loop over each entry, loop through each character...and so on. I'm looking for a nice script solution.
Update 2
By Fast, I mean fast to implement...not necessarily fast to run.