All files / leetCode 0387.ts

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3x
 
3x
24x
24x
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15x
 
 
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1x
 
 
export default function firstUniqChar(s: string): number {
  const map = new Map<string, number>()
 
  for (let i = 0; i < s.length; i++) {
    const char = s[i]
    if (map.has(char))
      map.set(char, -1)
    else map.set(char, i)
  }
 
  for (const index of map.values()) {
    if (index !== -1)
      return index
  }
 
  return -1
}