Feature request: add methods for working with strings (filtering, changing, converting) #11
Description
Is your feature request related to a problem? Please describe.
Need to add methods for working with strings (filtering, changing, converting).
Describe the solution you'd like
I have already written some methods in project AlgorithmAnalysis.
Describe alternatives you've considered
Try to find some other useful methods in the Internet.
Additional context
Do not forget to add tests.