32 lines
746 B
Rust
32 lines
746 B
Rust
use std::collections::BTreeMap;
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fn main() {
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let v = vec![1, 3, 5];
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println!("For each print:");
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for x in &v {
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println!("{}", x);
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}
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println!("Enumerate for each print:");
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for (i, x) in v.iter().enumerate() {
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println!("{} -> {}", i, x);
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}
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println!("Pop print:");
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let mut v2 = vec![2, 4, 6];
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while let Some(x) = v2.pop() {
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println!("{}", x);
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}
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println!("Map:");
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let v3: Vec<i32> = (0..3).collect();
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let v4 = v3.iter().map(|&x| x * 2).collect::<Vec<_>>();
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println!("{:?} -> {:?}", v3, v4);
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println!("To Map:");
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let v = (0..5).collect::<Vec<i32>>();
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let m = v.iter().map(|i| (*i, i * 10)).collect::<BTreeMap<i32, i32>>();
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println!("{:?}", m);
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}
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