using this in node console fails

[jcollum]

Because of node repl's use of the _ variable.

$ node                                                                              
>  var _ = require('underscore')                                                    
undefined                                                                           
> _.each                                                                            
TypeError: Cannot read property 'each' of undefined                                 
    at repl:1:3                                                                     
    at REPLServer.self.eval (repl.js:109:21)                                        
    at Interface.<anonymous> (repl.js:248:12)                                       
    at Interface.EventEmitter.emit (events.js:96:17)                                
    at Interface._onLine (readline.js:200:10)                                       
    at Interface._line (readline.js:518:8)                                          
    at Interface._ttyWrite (readline.js:736:14)                                     
    at ReadStream.onkeypress (readline.js:97:10)                                    
    at ReadStream.EventEmitter.emit (events.js:126:20)                              
    at emitKey (readline.js:1058:12)                                                
> require('./assets/js/lib/underscore.observable.js')                               
TypeError: Cannot call method 'mixin' of undefined                                  
    at c:\Users\jcollum\Dev\prevision8\web\assets\js\lib\underscore.observable.js:19
6:7                                                                                 
    at Object.<anonymous> (c:\Users\jcollum\Dev\prevision8\web\assets\js\lib\undersc
ore.observable.js:246:3)                                                            
    at Module._compile (module.js:449:26)                                           
    at Object.Module._extensions..js (module.js:467:10)                             
    at Module.load (module.js:356:32)                                               
    at Function.Module._load (module.js:312:12)                                     
    at Module.require (module.js:362:17)                                            
    at require (module.js:378:17)                                                   
    at repl:1:2                                                                     
    at REPLServer.self.eval (repl.js:109:21)                                        
>                                                                                   

If I use var und = require('underscore') it will be fine until I use the observe function:

> a                                                                                 
[ 'zero',                                                                           
  'one',                                                                            
  'two',                                                                            
  'trhee',                                                                          
  'fffour' ]                                                                        
> und.observe(a, func)                                                              
TypeError: Object zero,one,two,trhee,fffour has no method 'isArray'                 
    at Function._.mixin.observe (c:\Users\jcollum\Dev\prevision8\web\assets\js\lib\u
nderscore.observable.js:198:20)                                                     
    at repl:1:6                                                                     
    at REPLServer.self.eval (repl.js:109:21)                                        
    at Interface.<anonymous> (repl.js:248:12)                                       
    at Interface.EventEmitter.emit (events.js:96:17)                                                                                         

[mennovanslooten]

I've never tried using it in a Node environment. I'll go check it out tomorrow, thanks.

[jcollum]

I'm messing around with it right now but I'm not that great at node. I'm hoping to get something like require('./js/underscore.observable.js)(und) that would load up the mixin -- where und is the underscore require var.

[jcollum]

I think I've got it, forking now.

[gregmac]

_ is a special variable in Node REPL, which holds the result of the last expression.

Kind of annoying, but it's why this doesn't work as expected.