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slddiqvs.rowcased

Non Repeating Character Optimization

can't beat this can ya 😏

Code
Diff
  • const firstNonRepeatingCharacter = (str) => {
  let chars = [], counts = [];
  for(char of str) {
    let index = chars.indexOf(char);
    if(index < 0) {
      index = counts.length;
      chars.push(char);
      counts.push(0);
    }
    counts[index]++;
  }
  for(let i = 0; i < chars.length; i++) {
    if(counts[i] === 1) {
      return chars[i];
    }
  }
  return null
};
    • const firstNonRepeatingCharacter = (str) => {
    • let chars = [], counts = [];
    • for(const char of str) {
    • for(char of str) {
    • let index = chars.indexOf(char);
    • if(index < 0) {
    • index = counts.length;
    • chars.push(char);
    • counts.push(0);
    • }
    • counts[index]++;
    • }
    • for(let index = 0; index < chars.length; index++) {
    • if(counts[index] === 1) {
    • return chars[index];
    • for(let i = 0; i < chars.length; i++) {
    • if(counts[i] === 1) {
    • return chars[i];
    • }
    • }
    • return null;
    • return null
    • };