如何使用ES6在数组中存在的字符串中查找单词？

Question

If I have an array and I want to find out if any of the words in the array are in a string. I can do that with traditional JavaScript but how would I do that using ES6 constructs?

Example:

 var wordsInTheStringArray = ["red", "green", "blue"].filter(word => "the red cat. the green gopher.");
 wordsInTheStringArray; // ["red", "green"]

Classic Method:

var words = ["red", "green", "blue"]
var string = "the red cat. the green gopher.";
var found = [];

for(var i=0;i<words.length;i++) {
     var hasWord = string.indexOf(words[i])!=-1;
     hasWord ? found.push(words[i]) : 0;
}

console.log(found);

Answer 1

If I understand you correctly, not sure that I do, you can use sets to find the intersections of the words.

const wordsInTheStringArray = ["red", "green", "blue"];
const words = "the red and green cat";
const wordsSplit = words.split(" ");

const matches = wordsInTheStringArray.filter(word => new Set(wordsSplit).has(word));

That would give you the following result

["red", "green"]

Answer 2

This will look for strings in the string.

 var wordsInTheStringArray = ["red", "green", "blue"].filter(word => "the red cat. the green gopher.".includes(word)); console.log(wordsInTheStringArray); 

To look for words in the string: ( greener will not count)

 var wordsInTheStringArray = ["red", "green", "blue"].filter(word => "the red cat is not greener".split(' ').includes(word)); console.log(wordsInTheStringArray); 

Checking for punctuation in words: ( red. will count)

 var wordsInTheStringArray = ["red", "green", "blue"].filter(word => "the cat is red.".split(' ').map(w => w.split('').filter(l => ![".","\\,"].includes(l)).join('')).includes(word)); console.log(wordsInTheStringArray);