Custom REPL in nodejs

Question

I'm trying to play with the nodejs built in REPL from the documentation.

The example of adding an item is as follows:

repl.start().context.m = msg;

I cant seem to find away to add multiple menus. I've tried doing:

menus = {m = 'hello', f = 'foo'}
repl.start().context = menus

But that doesn't work either. I get:

testREPL> m
TypeError: needs a 'context' argument.
    at REPLServer.self.eval (repl.js:113:21)
    at Interface.<anonymous> (repl.js:250:12)
    at Interface.EventEmitter.emit (events.js:88:17)
    at Interface._onLine (readline.js:199:10)
    at Interface._normalWrite._line_buffer (readline.js:308:12)
    at Array.forEach (native)
    at Interface._normalWrite (readline.js:307:11)
    at Socket.ondata (readline.js:90:10)
    at Socket.EventEmitter.emit (events.js:115:20)
    at TCP.onread (net.js:395:14)

Does anybody know how to get this working?

Linus Thiel · Accepted Answer · 2012-09-17 09:15:45Z

4

You can't assign to the context property, you have to add properties to it. What you are trying is "overwriting" it with your own object. Try to assign each property by itself instead:

var context = repl.start({}).context;
context.m = 'hello';
context.f = 'foo';

answered Sep 17, 2012 at 9:15

Linus Thiel

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1 Comment

Menztrual Over a year ago

That worked. Im guessing javascript variables become pointers?

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