read-eval-print-loop

Let's say you want to use your own show function (for example, let show = take 1000 . Prelude.show ). How can you allow ghci to use that for printing instead of the built in show ? Lee You can define your own interactive print function e.g: module BetterPrint betterPrint a = putStrLn (take 1000 $ show a) then start ghci as ghci -interactive-print=BetterPrint.betterPrint 来源： https://stackoverflow.com/questions/35613612/how-can-i-get-ghci-to-use-my-show-function

Can I stop the execution of an infinite loop in Scala REPL? Type this and try to stop it without quitting the REPL. while(true){} I thought something like Ctrl-C would work. It depends on your scala version. If you are already on scala 2.9 it will work by just using CTRL-C. It might take some time untile the command reaches the REPL but it will abort your infinite loop at some time. If you are on an older version of scala (before 2.9). There is no way to stop execution. On those versions CTRL-C will lead to termination of the whole scala REPL. The change was introduced with Scala 2.9.0.RC2.

Very similar to this question: How can I start an interactive console for Perl? I just want to be able to start entering VBS statements, one at a time, and have them evaluated straight away, like Python's IDLE. Ansgar Wiechers I wrote this a couple years ago. It's based on this blog post (archived here ), but with a couple enhancements. Essentially it's a REPL (Read, Execute, Print, Loop) using the Execute statement: Do While True WScript.StdOut.Write(">>> ") line = Trim(WScript.StdIn.ReadLine) If LCase(line) = "exit" Then Exit Do On Error Resume Next Execute line If Err.Number <> 0 Then

I'm diving into NodeJS and Express (it's sooo complicated to me) to build a real-time web app. At the moment, I'm trying to understand how I can use an existing javascript library on the server side. The problem is the library appears to be designed to run on the client side and, as a result, the instructions only show you how to use it on the client side. The library I'm talking about can be found here... https://github.com/replit/jsrepl Questions: Since a NodeJS web app is built on javascript, is it fair to say I can run any non-gui javascript library on the server side? Can anyone offer

Is it possible, and if yes how is it done? The usual > and >> that work on the Windows or Linux command line don't work in this context. You can do it programmaticaly from console: import java.io.FileOutputStream import scala.Console Console.setOut(new FileOutputStream("<output file path>")) from now on all print and println would be directed into this file It's unclear from your question exactly how you want to use such a thing. An example of what you are trying to do might help. Here's an implicit function that will add a simple operator that writes any object as a String to a file. (Note