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use std::thread;
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fn main() {
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let mut child_threads = Vec::new();
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for _ in 1..5 {
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let handle = thread::spawn(|| {
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println!("Hi from thread id {:?}", thread::current().id());
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});
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child_threads.push(handle);
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}
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for i in child_threads {
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i.join().unwrap();
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}
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}
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