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${ noResults }
node/deps/npm/node_modules/inflight
Forrest L Norvell
7d0baf1741
PR-URL: https://github.com/iojs/io.js/pull/1142 Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Rod Vagg <rod@vagg.org> |
10 years ago | |
---|---|---|
.. | ||
.eslintrc | deps: upgrade npm to 2.7.1 | 10 years ago |
LICENSE | npm: upgrade to v1.4.14 | 11 years ago |
README.md | npm: upgrade to v1.4.14 | 11 years ago |
inflight.js | npm: Upgrade to v2.1.6 | 10 years ago |
package.json | npm: Upgrade to v2.1.6 | 10 years ago |
test.js | npm: Upgrade to v2.1.6 | 10 years ago |
README.md
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)