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bumpyshotvs.jcksnparsons

Non Repeating Character Optimization

Code
Diff
  • const firstNonRepeatingCharacter = (str) => {
    const charCount = {};

    for (const char of str) {
        charCount[char] = (charCount[char] || 0) + 1;
    }
    for (const char of str) {
        if (charCount[char] === 1) {
            return char;
        }
    }
    return null;
};
    • const firstNonRepeatingCharacter = (str) => {
    • for (let i = 0; i < str.length; i++) {
    • let seenDuplicate = false;
    • for (let j = 0; j < str.length; j++) {
    • if (str[i] === str[j] && i !== j) {
    • seenDuplicate = true;
    • break;
    • }
    • }
    • if (!seenDuplicate) {
    • return str[i];
    • const charCount = {};
    • for (const char of str) {
    • charCount[char] = (charCount[char] || 0) + 1;
    • }
    • for (const char of str) {
    • if (charCount[char] === 1) {
    • return char;
    • }
    • }
    • return null; // return null if no unique character is found
    • return null;
    • };