select.js
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// jshint esnext: true, loopfunc: true
var chan = require('..')
var co = require('co')
co(function *() {
var count = 10
, ch1
, ch2
while (count-- > 0) {
// macke new channels
ch1 = chan()
ch2 = chan()
// add a value on each channel after a random amout of time
setTimeout(function () { ch1('ch1') }, Math.random() * 100 | 0)
setTimeout(function () { ch2('ch2') }, Math.random() * 100 | 0)
// will block until there is data on either ch1 or ch2,
// and will return the channel with data
// if data is on both channels, a channel will be selected at random
switch (yield chan.select(ch1, ch2)) {
// channel 1 received data
case ch1:
// retrieve the message from the channel
console.log(yield ch1.selected)
break
// channel 2 received data
case ch2:
// retrieve the message from the channel
console.log(yield ch2.selected)
break
}
}
})()