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countSubstringOccurrences

문자열에서 특정 하위 문자열이 얼마나 반복 등장했는지 횟수를 반환하는 함수입니다.


Code​

🔗 실제 구현 코드 확인

Interface​

typescript
interface Options {
  overlap?: boolean; // default: false
}

const countSubstringOccurrences: (
  source: string,
  target: string,
  options?: Options
) => number;

Usage​

typescript
import { countSubstringOccurrences } from '@modern-kit/utils';

const str = 'apple banana apple grapes apple';
const count1 = countSubstringOccurrences(str, 'apple'); // 3
const count2 = countSubstringOccurrences(str, 'apple banana'); // 1

const duplicatedStr = 'aaaa'
const count3 = countSubstringOccurrences(duplicatedStr, 'aa'); // 2, double counting not allowed
const count4 = countSubstringOccurrences(duplicatedStr, 'aa', { overlap: true }); // 3, double counting allowed