Getting Started with Date/Time Manipulation in Clojure
About the Book
Quickly learn the building blocks needed to construct systems that do complex date and time manipulations. Unravel the dark mysteries that enable effortless transformations of timezones as they attach to the timeline and complex, ever-shifting daylight savings times rulesets.
Readers who have some familiarity with Clojure, but no prior experience with `java.time` or any other time APIs can quickly come up to speed with a little theoretical overview. The book then becomes a design pattern reference manual: a catalog of worked demonstration problems modeling various time/date scenarios become the building blocks for your more complex date/time system.
This is an early preview edition -- feedback is welcome! Tell me what sorts of demo material would be helpful.
- About the Cover:
- Preview Edition
Preface: Environmental Setup
- Java version 8 or higher
clojure.java-timeWrapper Library and ThreeTen-Extra Extensions
clojure.java-timeto your namespace
clojure.java-timeand Direct Java Calls Freely
- Brief Introduction to Timezones
The Timeline: an
Duration: Length of Time as Number of Seconds
Period: Length of Time as Days, Months, and Years
ZoneId: A Timezone – Rules to Map Between UTC and Local Time
LocalTime: Importunely Named Abstract Time of Day
LocalDate: importunely named representation of an abstract date
ZonedDateTime: a date + a time + a timezone
- Interval: Timespan Between Two Instants
- Offsets from UTC
- Brief overview of the history of time manipulation in Clojure
Bare Java versus
- Convert Times Between Timezones
- Find the Number of Days Between Two Dates
- Find Gaps in a Set of Intervals
- Find Overlaps in a Set of Intervals
- Perpetual Calendar of Business Days as Lazy Seq
- Appendix: Code License
The Leanpub 60 Day 100% Happiness Guarantee
Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.
You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!
So, there's no reason not to click the Add to Cart button, is there?
See full terms...
80% Royalties. Earn $16 on a $20 book.
We pay 80% royalties. That's not a typo: you earn $16 on a $20 sale. If we sell 5000 non-refunded copies of your book or course for $20, you'll earn $80,000.
(Yes, some authors have already earned much more than that on Leanpub.)
In fact, authors have earnedover $12 millionwriting, publishing and selling on Leanpub.
Learn more about writing on Leanpub
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.