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  1. const isLineWithDoubleLetters = (line) => {
  2.   const charCount = {};
  3.   for (const char of line) {
  4.     charCount[char] = (charCount[char] || 0) + 1;
  5.   }
  6.  
  7.   let result = null;
  8.   for (const [char, count] of Object.entries(charCount)) {
  9.     if (count === 2 && char !== ' ') {
  10.       return line
  11.     }
  12.   }
  13.     return result
  14. }
  15.  
  16. const processInput = (input) => {
  17.   const lines = input.split('\n');
  18.   const results = [];
  19.   lines.forEach(item => {
  20.     const line = isLineWithDoubleLetters(item);
  21.     if (line) {
  22.       results.push(line);
  23.     }
  24.   });
  25.   return results.join('\n');
  26. }
  27.  
  28. const input = `
  29. asdf 
  30. fdas
  31. asds
  32. d fm
  33. dfaa
  34. aaaa
  35. aabb
  36. aaabb
  37. `;
  38.  
  39. const input2 = `is Li neW ithD oubl eet ter`;
  40.  
  41. console.log('input', processInput(input));
  42. console.log('input2', processInput(input2));
  43.  
  44. // ?????????? чи потрібно враховувати пробіл або ловеркейс аперкейс ????
  45.  
Success #stdin #stdout 0.03s 17900KB
comments (?)
stdin
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Standard input is empty
stdout
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input asds
dfaa
aabb
aaabb
input2
https://ideone.com/3M0fS0
language:
JavaScript (SMonkey 60.2.3)
created:
9 days ago
visibility:
public

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