Implement Collection

src/collection/minOrNull.ts

@@ -0,0 +1,9 @@
+export function minOrNull(value: number[]): number | null {
+    if (value.length === 0) return null;
+    let min = value[0];
+    for (let index = 1; index < value.length; index++) {
+        const it = value[index];
+        if (it < min) min = it;
+    }
+    return min;
+}