rustHow to declare a constant HashSet in Rust?
A constant HashSet in Rust can be declared using the const
keyword.
const MY_HASH_SET: HashSet<i32> = [1, 2, 3].iter().cloned().collect();
This code creates a constant HashSet
called MY_HASH_SET
containing the elements 1
, 2
, and 3
. The iter()
method creates an iterator over the array, cloned()
creates a clone of each element, and collect()
collects the elements into a HashSet
.
const
: keyword used to declare a constantMY_HASH_SET
: name of the constantHashSet<i32>
: type of the constant[1, 2, 3]
: array of elements to be added to theHashSet
iter()
: creates an iterator over the arraycloned()
: creates a clone of each elementcollect()
: collects the elements into aHashSet
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