JavaScript-Interview-Questions/StringQuestion/index.html at main · Hamza-Rafique/JavaScript-Interview-Questions · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>String Questions</title>
  </head>
  <body>
    <h2>String most important question</h2>
    <script>
      // Convert String to Array with Each Character:

      let str = "i am hamza rafique";
      let arr = Array.from(str);
      console.log(arr, "arry");

      // convert str to array for each words,

      let onearray = str.split(" ");
      console.log(onearray, "one array");

      // Replace Any Character:
      let replaceCharacter = str.replace("a", "e");

      console.log(replaceCharacter, "replace character");

      // Get Substring from String:

      const substing = str.substring(12, 19);
      console.log(substing, "substing");

      // Remove Last Character:
      const removelastchar = str.slice(0, -1);
      console.log(removelastchar, "remove last char");

      // Remove First Character:
      const removefirstchar = str.slice(1);
      console.log(removefirstchar, "remove start char");

      // Remove String Before Specific Character:
      const removeStringBeforeSpecificChar = str.substring(str.indexOf("", 6));
      console.log(
        removeStringBeforeSpecificChar,
        "remove string before specific character"
      );

      // Remove Extra Spaces from Both Sides:
      const removeExtraSpaces = str.trim();
      console.log(removeExtraSpaces);

      //Find longest String in array

      const StrArray = [
        "Apple",
        "banana",
        "orange",
        "pianapple",
        "amrud",
        "jamnu",
      ];
      let longestStr = StrArray[0];
      for (let index = 0; index < StrArray.length; index++) {
        if (StrArray[index].length > longestStr.length) {
          longestStr = StrArray[index];
        }
      }
      console.log(longestStr, "longest String");
      //reverse a string
      let reverse = "longest string is here";
      const reverseStr = reverse.split("").reverse().join("");
      console.log(reverseStr, "reverserSting");
      //using recursive function
      function ReversMethod(str) {
        let res = "";
        for (let i = 0; i < str.length; i++) {
          res = str[i] + res;
          return res;
        }
      }
      console.log(ReversMethod("im hamza rafique recursive function"));
      // 2. Most commonly used character in a string. Write a function that takes a string and returns the character that is most commonly used in the string.

      function MostCommonlyUsedCharacter(str) {
        let map = {};
        for (let i = 0; i < str.length; i++) {
          let char = str[i];
          if (map[char]) {
            map[char]++;
          } else {
            map[char] = 1;
          }
        }
        let max = 0;
        let char = "";
        for (let key in map) {
          if (map[key] > max) {
            max = map[key];
            char = key;
          }
        }
        return char;
      }
    </script>
  </body>
</html>