Cscott has uploaded a new change for review.
https://gerrit.wikimedia.org/r/97017
Change subject: Add 'forEachPar' and 'forEachSeq' helpers to promise helper
module.
......................................................................
Add 'forEachPar' and 'forEachSeq' helpers to promise helper module.
These factor out common patterns.
Change-Id: I2d757de38120f41b8ba7178e80888b42cf7e7c7f
---
M lib/p.js
1 file changed, 25 insertions(+), 0 deletions(-)
git pull
ssh://gerrit.wikimedia.org:29418/mediawiki/extensions/Collection/OfflineContentGenerator/bundler
refs/changes/17/97017/1
diff --git a/lib/p.js b/lib/p.js
index 2f6544a..1f2a0dc 100644
--- a/lib/p.js
+++ b/lib/p.js
@@ -28,3 +28,28 @@
});
return deferred.promise;
};
+
+// Returns a promise for completion after iterating through the given
+// array in parallel. The function should return a promise for each element.
+// This is like map but we throw away the results.
+// If the optional `p` parameter is provided, wait for that to resolve
+// before starting to process the array contents.
+P.forEachPar = function(a, f, p) {
+ return (p || when.resolve()).then(function() {
+ return a;
+ }).then(function(aResolved) {
+ return when.all(aResolved.map(f));
+ });
+};
+
+// Returns a promise for completion after iterating through the given
+// array in sequence. The function should return a promise for each element.
+// If the optional `p` parameter is provided, wait for that to resolve
+// before starting to process the array contents.
+P.forEachSeq = function(a, f, p) {
+ p = p || when.resolve();
+ return when.reduce(a, function(curResult, value, index, total) {
+ /* jshint unused: vars */
+ return f.call(null, value, index, null);
+ }, p);
+};
--
To view, visit https://gerrit.wikimedia.org/r/97017
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: newchange
Gerrit-Change-Id: I2d757de38120f41b8ba7178e80888b42cf7e7c7f
Gerrit-PatchSet: 1
Gerrit-Project: mediawiki/extensions/Collection/OfflineContentGenerator/bundler
Gerrit-Branch: master
Gerrit-Owner: Cscott <canan...@wikimedia.org>
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