From abd94a7f5a50f43c797a11b53549ae48fff667c3 Mon Sep 17 00:00:00 2001 From: Florian Dold Date: Mon, 10 Oct 2016 03:43:44 +0200 Subject: add node_modules to address #4364 --- node_modules/inflight/README.md | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 node_modules/inflight/README.md (limited to 'node_modules/inflight/README.md') diff --git a/node_modules/inflight/README.md b/node_modules/inflight/README.md new file mode 100644 index 000000000..6dc892917 --- /dev/null +++ b/node_modules/inflight/README.md @@ -0,0 +1,37 @@ +# inflight + +Add callbacks to requests in flight to avoid async duplication + +## USAGE + +```javascript +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) +``` -- cgit v1.2.3