Created
October 3, 2014 15:54
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playing with generators
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| var Q = require('Q'); | |
| var fs = require('fs'); | |
| var generator = Q.async(function* () { | |
| yield 10 | |
| console.log('yielded 10'); | |
| yield 20 | |
| console.log('yielded 20'); | |
| yield 30 | |
| console.log('yielded 30'); | |
| return 40; | |
| }); | |
| generator().then(function(last) { | |
| console.log(last); | |
| }); | |
| function readFile(filename, enc){ | |
| return new Promise(function (fulfill, reject){ | |
| fs.readFile(filename, enc, function (err, res){ | |
| if (err) reject(err) | |
| else fulfill(res) | |
| }) | |
| }) | |
| } | |
| var readJSON = Q.async(function* (filename) { | |
| return JSON.parse(yield readFile(filename, 'utf8')); | |
| }); | |
| Q.spawn(function* () { | |
| var content = yield readJSON('foo.json', 'utf8'); | |
| console.log(content); | |
| }); | |
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