aboutsummaryrefslogtreecommitdiff
path: root/deps/node/deps/npm/node_modules/asynckit/lib/iterate.js
diff options
context:
space:
mode:
Diffstat (limited to 'deps/node/deps/npm/node_modules/asynckit/lib/iterate.js')
-rw-r--r--deps/node/deps/npm/node_modules/asynckit/lib/iterate.js75
1 files changed, 75 insertions, 0 deletions
diff --git a/deps/node/deps/npm/node_modules/asynckit/lib/iterate.js b/deps/node/deps/npm/node_modules/asynckit/lib/iterate.js
new file mode 100644
index 00000000..5d2839a5
--- /dev/null
+++ b/deps/node/deps/npm/node_modules/asynckit/lib/iterate.js
@@ -0,0 +1,75 @@
+var async = require('./async.js')
+ , abort = require('./abort.js')
+ ;
+
+// API
+module.exports = iterate;
+
+/**
+ * Iterates over each job object
+ *
+ * @param {array|object} list - array or object (named list) to iterate over
+ * @param {function} iterator - iterator to run
+ * @param {object} state - current job status
+ * @param {function} callback - invoked when all elements processed
+ */
+function iterate(list, iterator, state, callback)
+{
+ // store current index
+ var key = state['keyedList'] ? state['keyedList'][state.index] : state.index;
+
+ state.jobs[key] = runJob(iterator, key, list[key], function(error, output)
+ {
+ // don't repeat yourself
+ // skip secondary callbacks
+ if (!(key in state.jobs))
+ {
+ return;
+ }
+
+ // clean up jobs
+ delete state.jobs[key];
+
+ if (error)
+ {
+ // don't process rest of the results
+ // stop still active jobs
+ // and reset the list
+ abort(state);
+ }
+ else
+ {
+ state.results[key] = output;
+ }
+
+ // return salvaged results
+ callback(error, state.results);
+ });
+}
+
+/**
+ * Runs iterator over provided job element
+ *
+ * @param {function} iterator - iterator to invoke
+ * @param {string|number} key - key/index of the element in the list of jobs
+ * @param {mixed} item - job description
+ * @param {function} callback - invoked after iterator is done with the job
+ * @returns {function|mixed} - job abort function or something else
+ */
+function runJob(iterator, key, item, callback)
+{
+ var aborter;
+
+ // allow shortcut if iterator expects only two arguments
+ if (iterator.length == 2)
+ {
+ aborter = iterator(item, async(callback));
+ }
+ // otherwise go with full three arguments
+ else
+ {
+ aborter = iterator(item, key, async(callback));
+ }
+
+ return aborter;
+}