This is special tool for optimised search in folder.

1.Clone repository
2.Run "sbt" command inside
3.Run command runMain test.SimpleSearch directoryContainingTextFiles
where directoryContainingTextFiles - absolute path to the directory you want to search
4.You'll be promted to enter the list of words separated by spaces.
For example:
>david cat
5.You'll get list of all files which contain at least 1 of the words with occurence percentage.
Note: formula for percentage:
([number of words from list that file contains] / [whole number of words in list entered]) * 100
6.If you want to exit, enter :exit instead of the word

repository contains also folder "testFolder" for unit tests, demos and dev tests

Representation in memory:
All the words are stored in modified Trie structure (https://en.wikipedia.org/wiki/Trie).

Example structure of the trie:

Each node contains char of current letter, map of child nodes, parameter "is-finished" (means ending of the word), and if "is-finished"==true, there's also map that contains names of files and number of occurences of this word in each file