Implement dropLast/takeLast

src/collection/minOrNull.ts

@@ -1,8 +1,8 @@
 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];
+    for (let i = 1; i < value.length; i++) {
+        const it = value[i];
         if (it < min) min = it;
     }
     return min;