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  1. <!DOCTYPE html>
  2. <html>
  3.   <head>
  4.     <title>Check Lines</title>
  5.   </head>
  6.   <body>
  7.     <div style="display: flex">
  8.       <input type="text" id="inputText" placeholder="Enter text" /><br />
  9.       <button onclick="processInput()">Check Lines</button>
  10.     </div>
  11.  
  12.     <pre id="output"></pre>
  13.  
  14.     <script>
  15.       function processInput() {
  16.         const inputText = document.getElementById('inputText').value;
  17.  
  18.         document.getElementById('inputText').value = '';
  19.  
  20.         try {
  21.           if (inputText.trim() === '') {
  22.             throw new Error('Input cannot be empty');
  23.           }
  24.  
  25.           const text = inputText.split('\n');
  26.           const output = text.filter(
  27.             (line) =>
  28.               hasCharacterAppearingTwice(line) &&
  29.               !hasOnlyOneRepeatingCharacter(line),
  30.           );
  31.  
  32.           const outputElement = document.getElementById('output');
  33.           output.forEach((line) => {
  34.             const textNode = document.createTextNode(line);
  35.             const br = document.createElement('br');
  36.             outputElement.appendChild(textNode);
  37.             outputElement.appendChild(br);
  38.           });
  39.         } catch (error) {
  40.           alert('An error occurred: ' + error.message);
  41.         }
  42.       }
  43.  
  44.       function hasCharacterAppearingTwice(line) {
  45.         const charCount = {};
  46.  
  47.         for (let char of line) {
  48.           charCount[char] = (charCount[char] || 0) + 1;
  49.         }
  50.  
  51.         return Object.values(charCount).includes(2);
  52.       }
  53.  
  54.       function hasOnlyOneRepeatingCharacter(line) {
  55.         const uniqueChars = new Set(line);
  56.         return uniqueChars.size === 1;
  57.       }
  58.     </script>
  59.   </body>
  60. </html>
  61.  
Success #stdin #stdout 0.02s 25796KB
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stdin
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Standard input is empty
stdout
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<!DOCTYPE html>
<html>
  <head>
    <title>Check Lines</title>
  </head>
  <body>
    <div style="display: flex">
      <input type="text" id="inputText" placeholder="Enter text" /><br />
      <button onclick="processInput()">Check Lines</button>
    </div>

    <pre id="output"></pre>

    <script>
      function processInput() {
        const inputText = document.getElementById('inputText').value;

        document.getElementById('inputText').value = '';

        try {
          if (inputText.trim() === '') {
            throw new Error('Input cannot be empty');
          }

          const text = inputText.split('\n');
          const output = text.filter(
            (line) =>
              hasCharacterAppearingTwice(line) &&
              !hasOnlyOneRepeatingCharacter(line),
          );

          const outputElement = document.getElementById('output');
          output.forEach((line) => {
            const textNode = document.createTextNode(line);
            const br = document.createElement('br');
            outputElement.appendChild(textNode);
            outputElement.appendChild(br);
          });
        } catch (error) {
          alert('An error occurred: ' + error.message);
        }
      }

      function hasCharacterAppearingTwice(line) {
        const charCount = {};

        for (let char of line) {
          charCount[char] = (charCount[char] || 0) + 1;
        }

        return Object.values(charCount).includes(2);
      }

      function hasOnlyOneRepeatingCharacter(line) {
        const uniqueChars = new Set(line);
        return uniqueChars.size === 1;
      }
    </script>
  </body>
</html>
https://ideone.com/YKpODM
language:
PHP (php 7.3.5)
created:
47 days ago
visibility:
public

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