Hipster's code snippets.

javascript.js

// Call method.
var method = (success ? 'start' : 'stop');
obj[method]();

// Concatenation.
['first', 'name'].join(' '); // = 'first name';
['milk', 'coffee', 'suger'].join(', '); // = 'milk, coffee, suger'

// Value by default.
var name = myName || 'No name'; // Returns 'No name' when myName is null or undefined

var doStuff = function(options) {
  options = options || {};
  // ...
};

// &&
if (isThisAwesome) {
  alert('yes'); // it's not
}
 
isThisAwesome && alert('yes');
 
// Another case.
var aCoolFunction = undefined;
aCoolFunction && aCoolFunction(); // не запустится, но и не вылетит с ошибкой

// Native light templating.
var firstName = 'foo';
var screenName = 'bar'
 
var template = 'Hi, my name is {first-name} and my twitter screen name is @{screen-name}';
var txt = template.replace('{first-name}', firstName)
                  .replace('{screen-name}', screenName);