Question

从这些随机的字符串和数组中：

var str = "She folded her handkerchief neatly.";
var arr = ['foo', 'folded', 'bar', 'neatly'];

如何获取精简数组，该数组仅将值保留在字符串中？

var res = ['folded', 'neatly'];

Answer 1

使用Array.filter()和String.match()

可以轻松完成此任务

var str = "She folded her handkerchief neatly.";
var arr = ['foo', 'folded', 'bar', 'neatly'];

let res = arr.filter(s => str.match(s));
console.log(res);

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Answer 2

您可以使用Array.filter和String.includes

var str = "She folded her handkerchief neatly.";
var arr = ['foo', 'folded', 'bar', 'neatly'];

filteredArr = arr.filter(item => str.includes(item))

console.log(filteredArr);

Answer 3

使用新的JS功能。您可以使用 ES6 public class RadioFragment extends Fragment { Button b_play; MediaPlayer mediaPlayer; boolean prepared = false; boolean started = false; String stream = "http://streaming.radiodifusao.org:8110/stream?type=.mp3"; @Nullable @Override public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_radio, container, false); b_play = (Button) view.findViewById(R.id.b_play); b_play.setEnabled(false); b_play.setText("LOADING"); b_play.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (started) { started = false; mediaPlayer.pause(); b_play.setText("PLAY"); } else { started = true; mediaPlayer.start(); b_play.setText("PAUSE"); } } }); mediaPlayer = new MediaPlayer(); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); new PlayerTask().execute(stream); return view; } class PlayerTask extends AsyncTask<String, Void, Boolean> { @Override protected Boolean doInBackground(String... strings) { try { mediaPlayer.setDataSource(strings[0]); mediaPlayer.prepare(); prepared = true; } catch (IOException e) { e.printStackTrace(); } return prepared; } @Override protected void onPostExecute(Boolean aBoolean) { super.onPostExecute(aBoolean); b_play.setEnabled(true); b_play.setText("PLAY"); } } @Override public void onPause() { super.onPause(); if (started) { mediaPlayer.pause(); } } @Override public void onResume() { super.onResume(); if (started) { mediaPlayer.start(); } } @Override public void onDestroy() { super.onDestroy(); if (prepared) { mediaPlayer.release(); } } }功能。在 performance

方面，它比其他方法更快地工作

includes()

Javascript：从给定数组中获得字符串包含的元素的精简数组

3 个答案: