HarmonyOS string字符串和数组各如何判断是否包含某些元素

ArrayList使用可以参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-arraylist-V5

数组使用js的能力即可。

function checkstring() {
  let string1 = 'this is a test'
  let targetstring = 'test'
  let iscontain1: boolean = string1.includes(targetstring)
  console.info('check string result:' + iscontain1);
}

function checkarraylist() {
  let arrayList: ArrayList<string> = new ArrayList();
  arrayList.add("this");
  arrayList.add("is");
  arrayList.add("test");
  let iscontain2: boolean = arrayList.has("test");
  console.info('check arraylist result:' + iscontain2);
}

function checkArray() {
  let array = ['this', 'is', 'a', 'test']
  let targetstring = 'test'
  let iscontain3: boolean = array.includes(targetstring);
  console.info('check Array result:' + iscontain3);
}