[2016][rust][11.0] Floor.is_safe

sorbet
Alpha Chen 8 years ago
parent 148f22eccd
commit c785492970

@ -1,3 +1,8 @@
use regex;
use std::convert::TryFrom;
use std::str;
use errors::*;
// You come upon a column of four floors that have been entirely sealed off from the rest of the // You come upon a column of four floors that have been entirely sealed off from the rest of the
// building except for a small dedicated lobby. There are some radiation warnings and a big sign // building except for a small dedicated lobby. There are some radiation warnings and a big sign
// which reads "Radioisotope Testing Facility". // which reads "Radioisotope Testing Facility".
@ -6,19 +11,65 @@ struct Facility {
floors: Vec<Floor>, floors: Vec<Floor>,
} }
struct Floor(Vec<Item>); struct Floor {
items: Vec<Item>,
}
// According to the project status board, this facility is currently being used to experiment with impl Floor {
// Radioisotope Thermoelectric Generators (RTGs, or simply "generators") that are designed to be fn generators(&self) -> Vec<String> {
// paired with specially-constructed microchips. Basically, an RTG is a highly radioactive rock self.items.iter().map(|item| {
// that generates electricity through heat. match *item {
Item::Generator(ref s) => Some(s),
_ => None,
}
}).flat_map(|x| x).cloned().collect()
}
fn microchips(&self) -> Vec<String> {
self.items.iter().map(|item| {
match *item {
Item::Microchip(ref s) => Some(s),
_ => None,
}
}).flat_map(|x| x).cloned().collect()
}
}
#[test]
fn test_generators_and_microchips() {
let items = vec![
Item::Generator("a".into()),
Item::Microchip("b".into()),
];
let floor = Floor{items};
assert_eq!(floor.generators(), vec!["a".to_string()]);
assert_eq!(floor.microchips(), vec!["b".to_string()]);
}
#[derive(PartialEq)] #[derive(Clone, PartialEq)]
enum Item { enum Item {
Generator(String), Generator(String),
Microchip(String), Microchip(String),
} }
impl<'a> TryFrom<regex::Captures<'a>> for Item {
type Err = Error;
fn try_from(c: regex::Captures) -> Result<Item> {
let element = c.name("element").ok_or("missing element name")?;
let itemtype = c.name("itemtype").ok_or("missing item type")?;
match itemtype {
"generator" => { Ok(Item::Generator(element.into())) },
"microchip" => { Ok(Item::Microchip(element.into())) },
_ => { Err(format!("invalid item type: '{}", itemtype).into()) },
}
}
}
// According to the project status board, this facility is currently being used to experiment with
// Radioisotope Thermoelectric Generators (RTGs, or simply "generators") that are designed to be
// paired with specially-constructed microchips. Basically, an RTG is a highly radioactive rock
// that generates electricity through heat.
//
// The experimental RTGs have poor radiation containment, so they're dangerously radioactive. The // The experimental RTGs have poor radiation containment, so they're dangerously radioactive. The
// chips are prototypes and don't have normal radiation shielding, but they do have the ability to // chips are prototypes and don't have normal radiation shielding, but they do have the ability to
// generate an electromagnetic radiation shield when powered. Unfortunately, they can only be // generate an electromagnetic radiation shield when powered. Unfortunately, they can only be
@ -29,7 +80,39 @@ enum Item {
// to its own RTG, the chip will be fried. Therefore, it is assumed that you will follow procedure // to its own RTG, the chip will be fried. Therefore, it is assumed that you will follow procedure
// and keep chips connected to their corresponding RTG when they're in the same room, and away from // and keep chips connected to their corresponding RTG when they're in the same room, and away from
// other RTGs otherwise. // other RTGs otherwise.
//
impl Floor {
fn is_safe(&self) -> bool {
if self.generators().is_empty() {
return true;
}
let generators = self.generators();
let microchips = self.microchips();
let unpaired_chips = microchips.iter().filter(|microchip| {
!generators.contains(&microchip)
});
unpaired_chips.count() == 0
}
}
#[test]
fn test_is_safe() {
assert!(Floor{items: Vec::new()}.is_safe());
assert!(Floor{items: vec![Item::Generator("".into())]}.is_safe());
assert!(Floor{items: vec![Item::Microchip("a".into())]}.is_safe());
let items = vec![Item::Generator("a".into()), Item::Microchip("b".into())];
assert!(!Floor{items}.is_safe());
let items = vec![
Item::Generator("a".into()),
Item::Microchip("a".into()),
Item::Generator("b".into()),
];
assert!(Floor{items}.is_safe());
}
// These microchips sound very interesting and useful to your current activities, and you'd like to // These microchips sound very interesting and useful to your current activities, and you'd like to
// try to retrieve them. The fourth floor of the facility has an assembling machine which can make // try to retrieve them. The fourth floor of the facility has an assembling machine which can make
// a self-contained, shielded computer for you to take with you - that is, if you can bring it all // a self-contained, shielded computer for you to take with you - that is, if you can bring it all
@ -59,42 +142,34 @@ enum Item {
// The fourth floor contains nothing relevant. // The fourth floor contains nothing relevant.
// As a diagram (F# for a Floor number, E for Elevator, H for Hydrogen, L for Lithium, M for Microchip, and G for Generator), the initial state looks like this: // As a diagram (F# for a Floor number, E for Elevator, H for Hydrogen, L for Lithium, M for Microchip, and G for Generator), the initial state looks like this:
use regex;
use std::convert::TryFrom;
use std::str;
use errors::*;
impl str::FromStr for Floor { impl str::FromStr for Floor {
type Err = Error; type Err = Error;
fn from_str(input: &str) -> Result<Self> { fn from_str(input: &str) -> Result<Self> {
// Ok(Floor{items: Vec::new()})
let re = regex::Regex::new(r"(?P<element>\w+)(-compatible)? (?P<itemtype>generator|microchip)").unwrap(); let re = regex::Regex::new(r"(?P<element>\w+)(-compatible)? (?P<itemtype>generator|microchip)").unwrap();
let items = re.captures_iter(input).map(Item::try_from).collect::<Result<_>>(); re.captures_iter(input)
items.map(|items| Floor(items)) .map(|captures| Item::try_from(captures))
} .collect::<Result<Vec<_>>>()
} .map(|items| Floor{items} )
impl<'a> TryFrom<regex::Captures<'a>> for Item {
type Err = Error;
fn try_from(c: regex::Captures) -> Result<Self> {
let element = c.name("element").ok_or("missing element name")?;
let itemtype = c.name("itemtype").ok_or("missing item type")?;
match itemtype {
"generator" => Ok(Item::Generator(element.into())),
"microchip" => Ok(Item::Microchip(element.into())),
_ => Err(format!("unexpected item type: '{}'", itemtype).into()),
}
} }
} }
#[test] #[test]
fn test_floor_from_str() { fn test_floor_from_str() {
let input = "The first floor contains a hydrogen-compatible microchip and a lithium-compatible microchip."; let input = "The first floor contains a hydrogen-compatible microchip and \
a lithium-compatible microchip.";
let floor: Floor = input.parse().unwrap(); let floor: Floor = input.parse().unwrap();
assert_eq!(floor.items.len(), 2);
assert!(floor.items.contains(&Item::Microchip("hydrogen".into())));
assert!(floor.items.contains(&Item::Microchip("lithium".into())));
assert_eq!(floor.0.len(), 2); let input = "The first floor contains a hydrogen-compatible microchip and \
assert!(floor.0.contains(&Item::Microchip("hydrogen".into()))); a lithium generator.";
assert!(floor.0.contains(&Item::Microchip("lithium".into()))); let floor: Floor = input.parse().unwrap();
assert_eq!(floor.items.len(), 2);
assert!(floor.items.contains(&Item::Microchip("hydrogen".into())));
assert!(floor.items.contains(&Item::Generator("lithium".into())));
} }
// F4 . . . . . // F4 . . . . .

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