计算字符串数组中的子字符串

Question

我想计算数组中先生和小姐的使用次数。

我从其中一个开始，一直在尝试几种解决方案。

但是我无法理解如何对整个数组的计数求和，就像在我进行console.log记录时那样，它将打印其中的每一个，而不是数组中所有Mr的和？

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Answer 1

const array = [
  "Hello Mr, Hello Miss",
  "Hello Mr, Hello Miss",
  "Hello Mr, Hello Miss",
  "Hello Mr, Hello Miss"
];
console.log(array);

const count = (array.join(' ').match(/Miss|Mr/g) || []).length;
console.log(count);