Good information in the repl tag right here on Stack Overflow: About read-eval-print-loop A Read-Eval-Print Loop (REPL) is an interactive interpreter to a programming language. It originated with LISP systems, but many other languages (Python, Ruby, Haskell, Tcl, etc.) use REPL’s to manage interactive sessions. They allow for simple experimentation with a language by bypassing … Read more
Just found the IGCC (Interactive GCC) REPL. I like it. Example: ./igcc g++> int a = 1, b = 2; g++> printf(“%d\n”, a + b); 3 g++> And it gives you compile errors like this: g++> c = 3; [Compile error – type .e to see it.] g++> .e <stdin>:14:1: error: use of undeclared identifier … Read more
Either update to a newer scala version (2.10.3+) or downgrade java to java 6/7. As you have seen in the output, 2.9.2 was here long before java 8 was introduced (Copyright 2002-2011, LAMP/EPFL), so they don’t work well together. This duplicate question contains exact instructions on ubuntu’s java downgrade.
This answer complements Ankit Goel’s correct :quit answer to also (1) provide an understanding of why the : is needed and (2) other options besides :quit. Swift REPL works in conjuction with the LLDB debugger. : is a REPL escape prefix to execute an LLDB command. From within REPL, :help will list the available LLDB … Read more
Navigate to chrome://inspect/#devices on your chrome browser. From there, you should see a list of attached devices (including emulators, not sure about Andy), but if it is possible, that’s where you would find it.
Based on this question: REPL on console emacs, you can use M-x ielm (inferior emacs lisp mode).
The sys module provides some functions for post-hoc examining of exceptions: sys.last_type, sys.last_value, and sys.last_traceback. sys.last_value is the one you’re looking for.
In support of Stallman’s position, Python does not do the same thing as typical Lisp systems in the following areas: The read function in Lisp reads an S-expression, which represents an arbitrary data structure that can either be treated as data, or evaluated as code. The closest thing in Python reads a single string, which … Read more
The Python interpreter assigns the last expression value to _. This behaviour is limited to the REPL interpreter only, and is intended to assist in interactive coding sessions: >>> import math >>> math.pow(3.0, 5) 243.0 >>> result = _ >>> result 243.0 The standard Python interpreter goes to some length to not trample on user-defined … Read more
When you are stopped at a breakpoint in GHCi, you can access anything that’s in scope. Let’s say you have a function like this: foo :: Int -> Int foo x = g (x + 2) where g y = x^y You can set a breakpoint on foo and try calling it: > :break foo … Read more