[bash scripting] `contains_item` bash function. Check if an item is in an array

Sometimes you don’t want/cant use maven repos, all you have is a bunch of local jars on disk that you want to use as part of your compilation classpath, and the freaking gradle documentation is too vague. Here is an example: [pastacode lang=”java” manual=”dependencies%20%7B%0Acompile%20files(%E2%80%98lib%2Fjars%2Fgettext-commons.jar%E2%80%99%2C%0A%E2%80%98lib%2Fjars%2Flucene-3.5.0.jar%E2%80%99%2C%0A%E2%80%98lib%2Fjaudiotagger.jar%E2%80%99%2C%0A%E2%80%98lib%2Fjars%2Fh2-1.3.164.jar%E2%80%99%2C%0A%E2%80%98lib%2Fjars%2Fmessages.jar%E2%80%99%2C%0A%E2%80%98lib%2Fjars%2Fslf4j-api-1.7.5.jar%E2%80%99%2C%0A%E2%80%98lib%2Fjars%2Fjaudiotagger.jar%E2%80%99%2C%0A%E2%80%98lib%2Fjars%2Fmetadata-extractor-2.6.2.jar%E2%80%99%0A)%0A%7D” message=”” highlight=”” provider=”manual”/]