<html>
<head>
<script src="//cdn.jsdelivr.net/pouchdb/3.2.0/pouchdb.min.js"></script>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
</body>
</html>
var db = new PouchDB('groupByTest');
//db.destroy();
db.bulkDocs([
{"_id": "1", "title": "Rambo", "year": 2008, "genre": "Action"},
{"_id": "2", "title": "Forrest Gump", "year": 1994, "genre": "Drama"},
{"_id": "3", "title": "Gladiator", "year": 2000, "genre": "Action"},
{"_id": "4", "title": "The Mask", "year": 1994, "genre": "Comedy"}
]).then(function () {
var map = function(doc) {
emit(doc.genre, 1);
};
var reduce = function(keys, values, rereduce) {
return sum(values);
};
// if you are just summing (like the reduce function above is), it is better to use the build-in sum
reduce = "_sum";
db.query({map: map, reduce: reduce}, {reduce: true, group: true, group_level: 1}, function(err, response) {
console.log(JSON.stringify(response.rows));
/* The result:
[
{"key":"Action", "value":2},
{"key":"Comedy", "value":1},
{"key":"Drama", "value":1}
]
*/
});
});
Output
300px
You can jump to the latest bin by adding /latest
to your URL
Keyboard Shortcuts
Shortcut | Action |
---|---|
ctrl + [num] | Toggle nth panel |
ctrl + 0 | Close focused panel |
ctrl + enter | Re-render output. If console visible: run JS in console |
Ctrl + l | Clear the console |
ctrl + / | Toggle comment on selected lines |
ctrl + ] | Indents selected lines |
ctrl + [ | Unindents selected lines |
tab | Code complete & Emmet expand |
ctrl + shift + L | Beautify code in active panel |
ctrl + s | Save & lock current Bin from further changes |
ctrl + shift + s | Open the share options |
ctrl + y | Archive Bin |
Complete list of JS Bin shortcuts |
JS Bin URLs
URL | Action |
---|---|
/ | Show the full rendered output. This content will update in real time as it's updated from the /edit url. |
/edit | Edit the current bin |
/watch | Follow a Code Casting session |
/embed | Create an embeddable version of the bin |
/latest | Load the very latest bin (/latest goes in place of the revision) |
/[username]/last | View the last edited bin for this user |
/[username]/last/edit | Edit the last edited bin for this user |
/[username]/last/watch | Follow the Code Casting session for the latest bin for this user |
/quiet | Remove analytics and edit button from rendered output |
.js | Load only the JavaScript for a bin |
.css | Load only the CSS for a bin |
Except for username prefixed urls, the url may start with http://jsbin.com/abc and the url fragments can be added to the url to view it differently. |