ChristianKl comments on Open thread, Oct. 26 - Nov. 01, 2015 - Less Wrong

4 Post author: MrMind 26 October 2015 08:34AM

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Comment author: ChristianKl 31 October 2015 01:22:49PM 0 points [-]

A file is named:

XY.doc
AB.doc
IO.mp3

Having the last three character means that you get the type of the file. You can decide whether a file is a mp3 file or whether it isn't. At least that's true with standard file endings. However there's no gurantee that the ending is 3 characters long.