configurable-logger-example.js

configurable-logger-example.js

// TODO: given the log function previously created, create a prefixed logger
// function that takes a {String} as an argument.
// That string should be used as the first argument to the regular `log` function.

var log = function log() {
  var args = Array.prototype.slice.call(arguments);
  console.log(args.join(' '));
};

// log('hello', 'world', '!');
// -> Hello world !

function createLogger(prefix) {
  return function() {
    var args = Array.prototype.slice.call(arguments);
    args.unshift(prefix);

    // second argument === Array
    log.apply(null, args);
  };
}

// Example:
var logger = createLogger('MyApp ::');
logger('hello', 'world', '!');
// -> MyApp :: Hello world !