diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 00000000..6c2ff60b
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+    "githubPullRequests.ignoredPullRequestBranches": [
+        "master"
+    ]
+}
\ No newline at end of file
diff --git a/src/binary-reversal/index.js b/src/binary-reversal/index.js
index 965bccf4..c7067784 100644
--- a/src/binary-reversal/index.js
+++ b/src/binary-reversal/index.js
@@ -3,6 +3,17 @@
  *
  *  * @param {string} value
  */
-function binaryReversal(value) {}
+ function binaryReversal(value) {
+
+    let t = value.toString(2).split("");
+    let str_len = t.length;
+    for (let i = 0; i < 8 - str_len; i++) {
+        t.unshift("0");
+    }
+    return parseInt(t.reverse().join(""), 2);
+}
+// 14 -> 00001110 -> 01110000 -> 112
+console.log(binaryReversal(121));
+
 
 module.exports = binaryReversal;
diff --git a/src/list-sorting/index.js b/src/list-sorting/index.js
index 6636c20d..eef39887 100644
--- a/src/list-sorting/index.js
+++ b/src/list-sorting/index.js
@@ -1,3 +1,31 @@
-function listSorting(needle, haystack) {}
+/**
+ * @param {string} haystack
+ * @param {string} needle
+ * @return {number}
+ */
+ function listSorting(haystack, needle) {
+    if (!needle.length) return 0;
 
-module.exports = listSorting;
+    // Loop through the haystack's letters
+    for (let i = 0; i <= haystack.length - needle.length; i++) {
+        // Check if the current letter matches the start of the needle
+        if (haystack[i] === needle[0]) {
+            // Loop through the needle
+            for (let j = 0; ; j++) {
+                // Reached the end of the needle (and thus fully found it at i)
+                if (j == needle.length) {
+                    return i;
+                }
+                // Letters not matched (needle not found at i)
+                else if (haystack[i + j] !== needle[j]) {
+                    break;
+                }
+            }
+        }
+    }
+    return haystack;
+}
+
+console.log(listSorting(5, [1, 2, 3, 4, 5]));
+
+module.exports = listSorting;
\ No newline at end of file