Question

我正在使用.some（）和.includes（）检查字符串是否包含数组中的一个或多个条目，如下所示。

如果该字符串确实包含数组中的一个或多个条目，我想知道是哪一个。到目前为止，我还没有找到实现此目标的方法。

这是我的代码：

var hobby = ["sport","art","music"];
var message = "I love sport!";

if(hobby.some(el => message.includes(el))){
    console.log("a hobby is included");

     // tell me which hobby or hobbies here
}

Answer 1

使用.filter代替.some：

var hobby = ["sport", "art", "music"];
const checkMessage = (message) => {
  const hobbies = hobby.filter(word => message.includes(word));
  if (hobbies.length !== 0) {
    console.log('Looks like you like ' + hobbies.join(','));
  } else {
    console.log('No matching hobbies found');
  }
};

checkMessage("I love sport!");
checkMessage("foo bar");
checkMessage("music and art");

如果您想要匹配的索引，请使用.reduce：

var hobby = ["sport", "art", "music"];
const checkMessage = (message) => {
  const hobbyIndicies = hobby.reduce((a, word, i) => {
    if (message.includes(word)) {
      a.push(i);
    }
    return a;
  }, []);
  if (hobbyIndicies.length !== 0) {
    console.log('Looks like you like indicies ' + hobbyIndicies.join(','));
  } else {
    console.log('No matching hobbies found');
  }
};

checkMessage("I love sport!");
checkMessage("foo bar");
checkMessage("music and art");

Answer 2

可以使用.filter()方法代替.some()来获取message字符串中包含的项目列表。这又可以用来显示消息中的爱好。

该逻辑将涉及其他检查，以确保在将结果记录到控制台之前，已过滤列表的长度不为空：

var hobby = ["sport", "art", "music"];
var message = "I love sport!";

// Use .filter instead of .some
var result = hobby.filter(el => message.includes(el));

// If result not empty, log the result to console
if (result.length > 0) {
  console.log("a hobby or hobbies are included:", result);

  // To find matching indicies
  const matchingIndicies = hobby
    .map((str, index) => ({ str, index }))
    .filter((item) => message.includes(item.str))
    .map((item) => (item.str + ' at index ' + item.index));
 
  console.log("matching indicies:", matchingIndicies)
  // tell me which hobby or hobbies here
}

Answer 3

我更喜欢一个简单的forEach循环，如下所示：

var hobby = ["sport", "art", "music"];
var message = "I love sport!";
var idxs = []
var vals =[]
hobby.forEach(function(val, idx){
  if (message.includes(val))
  {
      idxs.push(idx);
      vals.push(val)
  }
});

if (vals.length !== 0) {
  console.log('You like ' + vals.join(','));
  console.log('Your hobby indices: ' + idxs.join(','));
} else {
  console.log('You Like Nothing!!');
}

javascript：检查字符串中包含哪个数组项（方法：.some（））

3 个答案: