Update 0658-find-k-closest-elements.go

Submission: https://leetcode.com/problems/find-k-closest-elements/submissions/1444796826/

Author: Jasoncheung94

go/0658-find-k-closest-elements.go

@@ -0,0 +1,13 @@
+func findClosestElements(arr []int, k int, x int) []int {
+	l, r := 0, len(arr)-k
+
+	for l < r {
+		m := (l + r) / 2
+		if x-arr[m] > arr[m+k]-x {
+			l = m + 1
+		} else {
+			r = m
+		}
+	}
+	return arr[l : l+k]
+}