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Update syntax-list-comprehensions.md

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rfcs/syntax-list-comprehensions.md
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@ -63,3 +63,15 @@ let vector = c![x, for x in 1..10, if x % 2 == 0];
### Function syntax ### Function syntax
List comprehensions could be implemented as functions with ``table.map`` or ``table.filter`` List comprehensions could be implemented as functions with ``table.map`` or ``table.filter``
Examples:
#### Perl
```perl
my @doubles = map {$_*2} 1..9;
```
#### Rust
```rust
let ns: Vec<_> = (0..100).filter(|x| x * x > 3).map(|x| 2 * x).collect();
```