How do I make the friendly format show units bigger than days?

[azzamsa]

How to ask HumanTime to show years, month, days?
Am I missing something?

use jiff::{ civil::Date, fmt::friendly::{Designator, SpanPrinter}, Zoned, }; fn main() -> anyhow::Result<()> { let date: Date = "2015-06-10".parse()?; let span: jiff::Span = Zoned::now().date() - date; println!("It has been {}", format!("{span:#}")); println!("It has been {}", humanize(span)); Ok(()) } // Turn duration into human readable format fn humanize(span: jiff::Span) -> String { dbg!(span); let printer = SpanPrinter::new().designator(Designator::HumanTime); printer.span_to_string(&span) }

🦄 cargo r` It has been 3534d [src/main.rs:19:5] span = 3534d It has been 3534d

[dependencies] jiff = "0.2" anyhow = "1.0"

[BurntSushi]

Does the section on rounding help answer your question?

For your code, I would do it like this, by specifying the largest unit:

use jiff::{ civil::Date, fmt::friendly::{Designator, SpanPrinter}, Unit, Zoned, }; fn main() -> anyhow::Result<()> { let date: Date = "2015-06-10".parse()?; let span = Zoned::now().date().since((Unit::Year, date))?; println!("It has been {}", format!("{span:#}")); println!("It has been {}", humanize(span)); Ok(()) } // Turn duration into human readable format fn humanize(span: jiff::Span) -> String { let printer = SpanPrinter::new().designator(Designator::HumanTime); printer.span_to_string(&span) }

Has this output:

$ cargo -q r It has been 9y 8mo 1d It has been 9y 8months 1d 

And note that you can do this directly on Zoned:

use jiff::{civil::Date, tz::TimeZone, Unit, Zoned}; fn main() -> anyhow::Result<()> { let date: Date = "2015-06-10".parse()?; let zdt = date.to_zoned(TimeZone::system())?; let span = Zoned::now().date().since((Unit::Year, &zdt))?; println!("It has been {}", format!("{span:#}")); Ok(()) }

Has this output:

$ cargo -q r It has been 9y 8mo 1d 

And if you do subtraction between two zoned datetime and get "too many" units like this:

use jiff::{tz::TimeZone, Unit, Zoned}; fn main() -> anyhow::Result<()> { let zdt = "2015-06-10T17:30[Poland]" .parse::<Zoned>()? .with_time_zone(TimeZone::system()); let span = Zoned::now().since((Unit::Year, &zdt))?; println!("It has been {}", format!("{span:#}")); Ok(()) }

$ cargo -q r It has been 9y 8mo 20h 11m 33s 877ms 721µs 838ns 

You can also specify the smallest unit, and Jiff will do automatic rounding for you:

use jiff::{tz::TimeZone, Unit, Zoned, ZonedDifference}; fn main() -> anyhow::Result<()> { let zdt = "2015-06-10T17:30[Poland]" .parse::<Zoned>()? .with_time_zone(TimeZone::system()); let span = Zoned::now().since( ZonedDifference::new(&zdt).smallest(Unit::Second).largest(Unit::Year), )?; println!("It has been {}", format!("{span:#}")); Ok(()) }

Which gives:

$ cargo -q r It has been 9y 8mo 20h 14m 24s 

[azzamsa]

Thanks a lot for Jiff 🥞

[BurntSushi]

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