Add more classes structures

1 files changed, 26 insertions, 0 deletions

diff --git a/lib/utils/promise.js b/lib/utils/promise.js
new file mode 100644
index 0000000..c25b349
--- /dev/null
+++ b/lib/utils/promise.js
@@ -0,0 +1,26 @@
+var Q = require('q');
+var _ = require('lodash');
+
+// Reduce an array to a promise
+function reduce(arr, iter, base) {
+    return _.reduce(arr, function(prev, elem, i) {
+        return prev.then(function(val) {
+            return iter(val, elem, i);
+        });
+    }, Q(base));
+}
+
+// Transform an array
+function serie(arr, iter, base) {
+    return reduce(arr, function(before, item, i) {
+        return Q(iter(item, i))
+        .then(function(r) {
+            before.push(r);
+            return before;
+        });
+    }, []);
+}
+
+module.exports = Q;
+module.exports.reduce = reduce;
+module.exports.serie = serie;