wip: migrate to bun

src/flatMap.ts

@@ -0,0 +1,28 @@
+import baseFlatten from './.internal/baseFlatten.js';
+import map from './map.js';
+
+/**
+ * Creates a flattened array of values by running each element in `collection`
+ * thru `iteratee` and flattening the mapped results. The iteratee is invoked
+ * with three arguments: (value, index|key, collection).
+ *
+ * @since 4.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the new flattened array.
+ * @see flatMapDeep, flatMapDepth, flatten, flattenDeep, flattenDepth, map, mapKeys, mapValues
+ * @example
+ *
+ * function duplicate(n) {
+ *   return [n, n]
+ * }
+ *
+ * flatMap([1, 2], duplicate)
+ * // => [1, 1, 2, 2]
+ */
+function flatMap(collection, iteratee) {
+    return baseFlatten(map(collection, iteratee), 1);
+}
+
+export default flatMap;