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{
  // This file should actually be called '.eslintrc'
  // Create it at the root directory of your Meteor app
  
  
  // I want to use babel-eslint for parsing!
  "parser": "babel-eslint",
  "env": {
    // I write for browser
    "browser": true,

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// ES5
Template.stats.onCreated(function () {
  var self = this;
  this.autorun(function () {
    var filter = { limit: Session.get('options.limit') };
    self.subscribe('tweets', filter);
  });
});

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// ES6
Template.stats.onCreated(function () {
  this.autorun(() => {
    const filter = { limit: Session.get('options.limit') };
    this.subscribe('tweets', filter); // same "this" as in line 3
  });
});

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// ES5
var versionsMap = {};
lines.forEach(function (line) {

  // split name@version into [name, version]
  var lineContents = line.split('@');
  var name = lineContents[0];
  var version = lineContents[1];
  versionsMap[name] = version;
});

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// ES6
const versionsMap = new Map();
lines.forEach((line) => {
  const [name, version] = line.split(‘@’); // destructuring
  versionsMap.set(name, version);
});

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// ES6
const versionsMap = new Map();
lines.forEach( line => versionsMap.set(...line.split(‘@’)) );

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// ES5
UI.registerHelper('sum', function (/* arguments */) {
  var summands = Array.prototype.slice.call(arguments);
  summands.pop(); // remove last argument hash (Spacebars.kw)
  var sum = 0;
  for (var i = 0; i < summands.length; i++) {
    sum += summands[i];
  }
  return sum;
});

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// ES6
UI.registerHelper('sum', function (...summands) {   
  summands.pop(); // remove last argument hash (Spacebars.kw)
  return summands.reduce((previousValue, currentValue) => {
    return previousValue + currentValue;
  });
});

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// ES6
Template.lead.helpers({
  twitterLink () {
    return this.getTwitterLink();
  },
  weekday (timestamp) {
    return moment(timestamp).format(‘dddd’);
  }
});

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// ES6
class Tweet {
  constructor (doc) {
    _.extend(this, doc);
  }
}

Tweets = new Mongo.Collection('tweets', {
  transform (doc) {
    return new Tweet(doc);