From e41c3a7c925387ca2c2441b4f41c963b95bc828d Mon Sep 17 00:00:00 2001
From: mo8it <mo8it@proton.me>
Date: Thu, 8 Aug 2024 23:46:21 +0200
Subject: Use fixed seeds with ahash

---
 src/collections.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 src/collections.rs

(limited to 'src/collections.rs')

diff --git a/src/collections.rs b/src/collections.rs
new file mode 100644
index 0000000..fa9e3fa
--- /dev/null
+++ b/src/collections.rs
@@ -0,0 +1,10 @@
+use ahash::AHasher;
+use std::hash::BuildHasherDefault;
+
+/// DOS attacks aren't a concern for Rustlings. Therefore, we use `ahash` with fixed seeds.
+pub type HashSet<T> = std::collections::HashSet<T, BuildHasherDefault<AHasher>>;
+
+#[inline]
+pub fn hash_set_with_capacity<T>(capacity: usize) -> HashSet<T> {
+    HashSet::with_capacity_and_hasher(capacity, BuildHasherDefault::<AHasher>::default())
+}
-- 
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