✨ [125] Valid Palindrome

Author: enkr1

125/my_solution.js

@@ -0,0 +1,32 @@
+/**
+ * @param {string} s
+ * @return {boolean}
+*/
+const isPalindrome = (s) => {
+  // process the string to trim &
+  // gpt why what is this fking regex
+  s = s.replace(/[^a-zA-Z0-9]+/g, '').trim().toLowerCase();
+  //s= s.replace(/[a-zA-z]/g);
+  console.log(s)
+  //	for (let i = 0; i < s.length; i++) {
+
+  let l = 0, r = s.length - 1;
+
+  while (l <= r) {
+
+    if (s[l] !== s[r]) {
+      return false;
+    }
+
+    l++;
+    r--;
+  }
+
+  return true;
+}
+
+// let x = isPalindrome("A man, a plan, a canal: Panama")
+// let x = isPalindrome("A man, a plan, a canal: Panama")
+let x = isPalindrome("0P")
+console.log("result")
+console.log(x)

125/solution.js

@@ -0,0 +1,17 @@
+/**
+ * @param {string} s
+ * @return {boolean}
+*/
+const isPalindrome = (s) => {
+  s = s.replace(/[^a-zA-Z0-9]+/g, '').trim().toLowerCase();
+  let l = 0, r = s.length - 1;
+
+  while (l <= r) {
+    if (s[l] !== s[r]) return false;
+
+    l++;
+    r--;
+  }
+
+  return true;
+}

README.md

@@ -30,6 +30,7 @@
 - [76. Minimum Window Substring](./76/)
 - [83. Remove Duplicates from Sorted List](./83/)
 - [121. Best Time to Buy and Sell Stock](./121/)
+- [125. Valid Palindrome](./125/)
 - [141. Linked List Cycle](./141/)
 - [143. Reorder List](./143/)
 - [152. Maximum Product Subarray](./152/)
@@ -81,5 +82,5 @@ Batch create in bash
 TODO: Add to TOC!
 -->
 ```ssh
-chapter=76 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
+chapter=125 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
 ```

test.js

@@ -5,3 +5,18 @@ if (obj["a"]) {
 } else {
   console.log("n")
 }
+
+
+
+function extractWords(str) {
+  // replace(/[^\p{L}\s]/gu, '').replace(/\s+/g, ' ').trim()
+  // return str.replace(/[^a-zA-Z\s]/g, '').replace(/\s+/g, ' ').trim();
+  return str.replace(/[^a-zA-Z]+/g, '').trim();
+  return str.replace(/[^a-zA-Z\s]+/g, ' ').trim();
+
+}
+
+
+// let str ="qw1 19jod12901j2@J(!@#"
+let str = "A man, a plan, a canal: Panama";
+console.log(extractWords(str));