Hash join: Difference between revisions
Content added Content deleted
(→{{header|Kotlin}}: Updated example see https://github.com/dkandalov/rosettacode-kotlin for details) |
(→{{header|Rust}}: Make more idiomatic) |
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=={{header|Rust}}== |
=={{header|Rust}}== |
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<lang rust> |
<lang rust>use std::collections::HashMap; |
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use std::collections::HashMap; |
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fn main() { |
fn main() { |
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let mut h = HashMap::new(); |
let mut h = HashMap::new(); |
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for (i, a) in table_a.iter().enumerate() { |
for (i, a) in table_a.iter().enumerate() { |
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h.entry(a.1). |
h.entry(a.1).or_insert_with(Vec::new).push(i); |
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} |
} |
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// join phase |
// join phase |
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for b in table_b { |
for b in table_b { |
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if let Some(vals) = h.get(b.0) { |
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for &val in vals { |
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let a = table_a.get(val).unwrap(); |
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println!("{:?} {:?}", a, b); |
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} |
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} |
} |
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} |
} |
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