odyss009/indent.js

## indent.js
//indent rule
return Promise.all(keys.map(key => scan(key)))
    .then(result => [].concat(...result))
    .then(expireKeys.bind(null, client));

//beauiful
return Promise.all(keys.map(key => scan(key)))
              .then(result => [].concat(...result))
              .then(expireKeys.bind(null, client));
	//indent rule
	return Promise.all(keys.map(key => scan(key)))
	.then(result => [].concat(...result))
	.then(expireKeys.bind(null, client));

	//beauiful
	return Promise.all(keys.map(key => scan(key)))
	.then(result => [].concat(...result))
	.then(expireKeys.bind(null, client));