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Rich Trott
d7aa8fa088
Update ESLint to 2.1.0. ESLint has a number of potentially-useful new features but this change attempts to be minimal in its changes. However, some things could not be avoided reasonably. ESLint 2.1.0 found a few lint issues that ESLing 1.x missed with template strings that did not take advantage of any features of template strings, and `let` declarations where `const` sufficed. Additionally, ESLint 2.1.0 removes some granularity around enabling ES6 features. Some features (e.g., spread operator) that had been turned off in our configuration for ESLint 1.x are now permitted. PR-URL: https://github.com/nodejs/node/pull/5214 Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: jbergstroem - Johan Bergström <bugs@bergstroem.nu> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io> Reviewed-By: Myles Borins <myles.borins@gmail.com>
inflight
Add callbacks to requests in flight to avoid async duplication
USAGE
var inflight = require('inflight')
// some request that does some stuff
function req(key, callback) {
// key is any random string. like a url or filename or whatever.
//
// will return either a falsey value, indicating that the
// request for this key is already in flight, or a new callback
// which when called will call all callbacks passed to inflightk
// with the same key
callback = inflight(key, callback)
// If we got a falsey value back, then there's already a req going
if (!callback) return
// this is where you'd fetch the url or whatever
// callback is also once()-ified, so it can safely be assigned
// to multiple events etc. First call wins.
setTimeout(function() {
callback(null, key)
}, 100)
}
// only assigns a single setTimeout
// when it dings, all cbs get called
req('foo', cb1)
req('foo', cb2)
req('foo', cb3)
req('foo', cb4)