feat: hashcode

lib/misc/hashCode.ts

@@ -0,0 +1,27 @@
+/** Jenkins one_at_a_time hash https://en.wikipedia.org/wiki/Jenkins_hash_function */
+export const jenkinsHash = (s: string) => {
+  let hash = 0;
+
+  for (let i = 0; i < s.length; i++) {
+    hash += s.charCodeAt(i);
+    hash += hash << 10;
+    hash ^= hash >>> 6;
+  }
+
+  hash += hash << 3;
+  hash ^= hash >>> 11;
+  hash += hash << 15;
+
+  return hash;
+};
+
+/** Java hashCode() i think */
+export const hashCode = (s: string) => {
+  let hash = 0;
+  for (let i = 0; i < s.length; i++) {
+    hash = (hash << 5) - hash + s.charCodeAt(i);
+    hash |= 0;
+  }
+
+  return hash;
+};

lib/misc/index.ts

@@ -1 +1,2 @@
+export * from './hashCode';
 export * from './luhnCheck';

package.json

@@ -10,20 +10,12 @@
     "fmt": "biome check . --write",
     "test": "node --disable-warning=ExperimentalWarning --test --enable-source-maps"
   },
-  "keywords": [
-    "util",
-    "utility"
-  ],
+  "keywords": ["util", "utility"],
   "license": "MIT",
   "devDependencies": {
     "@biomejs/biome": "^1.9.1",
     "@types/node": "^20.11.16",
     "typescript": "^5.3.3"
   },
-  "files": [
-    "build",
-    "biome.json",
-    "tsconfig.json",
-    "LICENSE"
-  ]
+  "files": ["build", "biome.json", "tsconfig.json", "LICENSE"]
 }