Implement Collection

src/collection/minBy.ts

@@ -0,0 +1,16 @@
+import {error} from "../util/error";
+
+export function minBy<T>(value: T[], transform: (it: T) => number): T {
+    if (value.length === 0) error();
+    let min = value[0];
+    let minVal = transform(min);
+    for (let index = 1; index < value.length; index++) {
+        const it = value[index];
+        const val = transform(it);
+        if (val < minVal) {
+            min = it;
+            minVal = val;
+        }
+    }
+    return min;
+}