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Project: Lowercase Filter

Write a filter program that converts the input stream characters to lowercase when appropriate.

Output
$ swiftc LowercaseFilter.swift -I . -L . -lUtils error: link command failed with exit code 1 (use -v to see invocation) ld: library not found for -lUtils clang: error: linker command failed with exit code 1 (use -v to see invocation)

Solution