group timestamps into "buckets" by applying a granularity to a discrete value
Want to see pretty graphs? Log in now!
npm install timebucket
|14||downloads in the last week|
|29||downloads in the last month|
|Last Published By|
|Version||0.3.1 last updated 10 months ago|
|Keywords||time, granularity, computation, series, domain, stamp, group|
Group timestamps into "buckets" by applying a granularity to a discrete value
A timebucket is a type of time domain which combines a size identifier (granularity) with a discrete value, and can be stored as a compact string.
Timebuckets are useful for grouping timestamps together using a particular granularity (such as groups of 30 minutes), as an aid for graphing or map/reduce-ing time-series data.
Anatomy of a timebucket
A timebucket consists of:
- a size spec (string) which consists of:
- (optional) an unsigned multiplier (default:
- a granularity identifier, i.e.
- (optional) an unsigned multiplier (default:
- a signed value, i.e. number of seconds, after or before epoch year (1970)
8h-491- time (within 8 hours) of first moonwalk (
y43- the year 2013
timebucket module exports a factory function. It supports the
following argument combinations:
timebucket()- build timebucket with millisecond granularity applied to current date
timebucket(size)- build from specific size (string identifier, see list below) applied to current date
timebucket(milliseconds)- build from milliseconds since 1970
timebucket(size, value)- build from specific size and value
timebucket(date)- build from date object with millisecond granularity
timebucket(str)- build from string representation
To resize a bucket, call
console.log(timebucket('y').resize('30m') + ''); // '30m753360'
toString()- convert to string representation
toJSON()- same as
toMilliseconds()- convert to millisecond UNIX time offset
toDate()- convert to Date object
var timebucket = require('timebucket'); // defaults to current milliseconds after unix epoch console.log(timebucket() + ''); // 'ms1369656669680' // default size (milliseconds) and value console.log(timebucket(1369601120380) + ''); // 'ms1369601120380' // specific size (seconds) and value console.log(timebucket('s', 1369601125) + ''); // 's1369601125' // resize to year console.log(timebucket().resize('y') + ''); // 'y43' // use current time, specific size console.log(timebucket('30m') + ''); // '30m760920' // create timebucket from current seconds after unix epoch, and add 5 console.log(timebucket('s').add(5) + ''); // 's1369656674' // from date object console.log(timebucket(new Date()) + ''); // 'ms1369656669686' // from string representation console.log(timebucket('y43') + ''); // 'y43' // access granularity and value as properties var t = timebucket(); console.log(t.size.value, t.size.granularity, t.value); // 1 'ms' 1369656669686 // resize console.log(timebucket('y').resize('30m') + ''); // '30m753360' // from current microseconds (smallest supported bucket size) console.log(timebucket('µs') + ''); // 'µs1369659466378060' // resize from microseconds console.log(timebucket('µs1369657390541000').resize('y') + ''); // 'y43'
Timebuckets also have a 64-bit integer representation which contains granularity metadata, while maintaining sortability with buckets of the same granularity.
var timebucket = require('timebucket'); var num = timebucket('8h-491').toNumber(); // toNumber() returns a 64-bit integer representation as a Number console.log(num); // -49133 var bucket = timebucket.fromNumber(num); // fromNumber() takes the result of toNumber(), and returns a timebucket instance: console.log(bucket.toString()); // 8h-491
Developed by Terra Eclipse
Terra Eclipse, Inc. is a nationally recognized political technology and strategy firm located in Aptos, CA and Washington, D.C.
- Copyright (C) 2012 Carlos Rodriguez (http://s8f.org/)
- Copyright (C) 2012 Terra Eclipse, Inc. (http://www.terraeclipse.com/)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.