如何检查一个单词在JSON数组中出现了多少次

// 假设我们有一个名为jsonArray的JSON数组，要检查的单词为word
var jsonArray = [
  { "name": "John", "age": 30 },
  { "name": "Jane", "age": 25 },
  { "name": "John", "age": 35 }
];
var word = "John";

function countWordOccurrences(jsonArray, word) {
  var count = 0;
  
  for (var i = 0; i < jsonArray.length; i++) {
    var obj = jsonArray[i];
    for (var key in obj) {
      if (obj.hasOwnProperty(key) && typeof obj[key] === "string" && obj[key].includes(word)) {
        count++;
      }
    }
  }
  
  return count;
}

console.log(countWordOccurrences(jsonArray, word)); // 输出：2