[WIP] modularization (#984)

1 files changed, 26 insertions, 0 deletions

diff --git a/lib/seq.js b/lib/seq.js
new file mode 100644
index 0000000..184dc4b
--- /dev/null
+++ b/lib/seq.js
@@ -0,0 +1,26 @@
+import noop from 'lodash/utility/noop';
+import reduce from './reduce';
+import restParam from 'lodash/function/restParam';
+
+export default function seq( /* functions... */ ) {
+    var fns = arguments;
+    return restParam(function(args) {
+        var that = this;
+
+        var cb = args[args.length - 1];
+        if (typeof cb == 'function') {
+            args.pop();
+        } else {
+            cb = noop;
+        }
+
+        reduce(fns, args, function(newargs, fn, cb) {
+                fn.apply(that, newargs.concat([restParam(function(err, nextargs) {
+                    cb(err, nextargs);
+                })]));
+            },
+            function(err, results) {
+                cb.apply(that, [err].concat(results));
+            });
+    });
+}