ex09.js

/*
Use Function#bind to implement a logging function that allows you to namespace messages.

Your implementation should take a namespace string, and return a function that prints messages to the console with the namespace prepended.

Make sure all arguments passed to the returned logging function are printed.

 Print the output to the console directly 

Arguments

  * namespace: a String to prepend to each message passed to the returned function.

Example

    
    var info = logger('INFO:')
    info('this is an info message')
    // INFO: this is an info message
    
    var warn = logger('WARN:')
    warn('this is a warning message', 'with more info')
    // WARN: this is a warning message with more info

Conditions

  * Use Function#bind

*/

function logger(namespace) {
  return console.log.bind(undefined, namespace);
}

var info = logger('INFO:');
info('Some important information', 'with more info', 'and even more info');