solve valid-palindrome

Author: 1lsang

valid-palindrome/1lsang.ts

@@ -0,0 +1,26 @@
+function isPalindrome(s: string): boolean {
+  // console.log('A'.charCodeAt(0), 'Z'.charCodeAt(0)); // 65 90
+  // console.log('a'.charCodeAt(0), 'z'.charCodeAt(0)); // 97 122
+  // console.log('0'.charCodeAt(0), '9'.charCodeAt(0)); // 48 57
+
+  // 문자열 변환 과정
+  let converted = ''
+  for (let c of s) {
+    const charCode = c.charCodeAt(0);
+    if (charCode >= 65 && charCode <= 90) {
+      converted += c.toLowerCase();
+    }
+    else if ((charCode >= 97 && charCode <= 122) || (charCode >= 48 && charCode <= 57)) {
+      converted += c;
+    }
+  }
+  
+  // palindrome 판단 조건
+  const length = converted.length;
+  
+  for (let i = 0; i < length/2; i ++) {
+    if (converted[i] !== converted[length - 1 - i]) return false;
+  }
+
+  return true;  
+};