If you’re introducing Kotlin to an existing Java codebase, you’ll probably have places in your code where new Kotlin code has to call existing Java code, or vice-versa. Kotlin’s default behavior for Java interop poses a subtle, but significant safety problem with nullability.... ➦
When working on the command-line, it’s often useful to paste from the system clipboard to a command-line tool, or to copy output from the command-line into your system clipboard.
pbpaste do this. On Linux, you can use