NebulaFox
/ playground.rs
Last active
March 17, 2020 15:41
How long is a piece of string with make a string
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| use rand; // 0.7.3 | |
| use rand::Rng; | |
| fn make_a_string() -> String { | |
| let mut s = String::new(); | |
| s.push_str("Hello World"); | |
| let mut rng = rand::thread_rng(); | |
| let r = rng.gen_range(0, 100); | |
| for _ in 0..r { |
NebulaFox
/ playground.rs
Last active
March 17, 2020 13:54
How long is a piece of string with make a string with another string
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| use rand; // 0.7.3 | |
| use rand::Rng; | |
| fn make_a_string_with(string: &str) -> String { | |
| let mut s = String::new(); | |
| s.push_str(string); | |
| let mut rng = rand::thread_rng(); | |
| let r = rng.gen_range(0, 100); | |
| for _ in 0..r { |
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| use rand; // 0.7.3 | |
| use rand::Rng; | |
| fn make_a_string_with(string: &str) -> String { | |
| let mut s = String::new(); | |
| s.push_str(string); | |
| let mut rng = rand::thread_rng(); | |
| let r = rng.gen_range(0, 100); | |
| for _ in 0..r { |
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| use rand; // 0.7.3 | |
| use rand::Rng; | |
| fn make_a_string_with(string: &str) -> String { | |
| let mut s = String::new(); | |
| s.push_str(string); | |
| let mut rng = rand::thread_rng(); | |
| let r = rng.gen_range(0, 100); | |
| for _ in 0..r { |
NebulaFox
/ playground.rs
Created
March 17, 2020 15:51
how long is a piece of string corecing String
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| use rand; // 0.7.3 | |
| use rand::Rng; | |
| fn make_a_string() -> String { | |
| let mut s = String::new(); | |
| s.push_str("Hello World"); | |
| let mut rng = rand::thread_rng(); | |
| let r = rng.gen_range(0, 100); | |
| for _ in 0..r { |
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| use std::ops::Deref; | |
| use rand; // 0.7.3 | |
| use rand::Rng; | |
| #[derive(Debug, PartialEq)] | |
| struct Wrap<T> { | |
| inside: T | |
| } | |
| impl<T> Wrap<T> { |
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| fn contains<T, Q>(arr: &[T], value: &Q) -> bool | |
| where | |
| T: std::cmp::PartialEq<Q>, | |
| { | |
| arr.iter().any(|v| v == value) | |
| } | |
| fn main() { | |
| let array_str = ["a", "b", "c"]; | |
| let array_string = ["a".to_string(), "b".to_string(), "c".to_string()]; |
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| fn main() { | |
| let array_str = ["a", "b", "c"]; | |
| let array_string = ["a".to_string(), "b".to_string(), "c".to_string()]; | |
| let value_str = "b"; | |
| let value_string = String::from(value_str); | |
| let result_str = array_str.contains(&value_string); | |
| let result_string = array_string.contains(&value_str); | |
| let result_literal = array_string.contains("b"); |
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| use std::collections::HashSet; | |
| fn main() { | |
| let hs_str: HashSet<&str> = ["a", "b", "c"].iter().copied().collect(); | |
| let hs_string: HashSet<String> = vec!["a".to_string(), "b".to_string(), "c".to_string()] | |
| .into_iter() | |
| .collect(); | |
| let value_str = "b"; | |
| let value_string = String::from(value_str); |
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| use std::collections::HashSet; | |
| fn contains<T, Q>(arr: &HashSet<T>, value: &Q) -> bool | |
| where | |
| T: std::cmp::PartialEq<Q>, | |
| { | |
| arr.iter().any(|v| v == value) | |
| } | |
| fn main() { |