JRR questions

• check element using casperjs
• Bounded-wildcard related compiler error
• appending numpy array with booleans
• using spot instances with dask.distributed
• error when starting the spark shell
• is it possible to skip junit tests in ant build script?
• What are the uses for parameters in Racket?
• IntelliJ automatically build artifacts when code changes
• defining macro-generated macros that take in variable number of arguments
• how can I create a new language in racket?

JRR answers