使用迭代器在字符串和数组中查找并计算匹配

Question

我需要在带有数组元素的变量中计算匹配单词的数量。我使用了循环和迭代方法。我的问题是如何简化和改进我的代码？

任务听起来像：有一系列称为过时的单词。这些是这个故事过度使用的话。您想让您的程序的用户知道他们使用了这些过度使用的单词多少次。

let story = 'Last weekend, I took literally the most beautiful bike ride of my life. The route is called "The 9W to Nyack" and it actually stretches all the way from Riverside Park in Manhattan to South Nyack, New Jersey. It's really an adventure from beginning to end! It is a 48 mile loop and it basically took me an entire day. I stopped at Riverbank State Park to take some extremely artsy photos. It was a short stop, though, because I had a really long way left to go. After a quick photo op at the very popular Little Red Lighthouse, I began my trek across the George Washington Bridge into New Jersey.  The GW is actually very long - 4,760 feet! I was already very tired by the time I got to the other side.  An hour later, I reached Greenbrook Nature Sanctuary, an extremely beautiful park along the coast of the Hudson.  Something that was very surprising to me was that near the end of the route you actually cross back into New York! At this point, you are very close to the end.';
let overusedWords = ['really', 'very', 'basically'];
const storyWords = story.split(' ');
for (i = 0; i < overusedWords.length; i++){ 
    const overuseElements = betterWords.filter(overuseElementsInBetterWords = overusedWords.slice(i, i+1).includes(overuseElementsInBetterWords)); 
    console.log(overuseElements[i]+': '+overuseElements.length);
}
// really: 2
// very: 5
// undefined: 1

Answer 1

一个解决方案可以通过每个过度使用的单词到 map，然后从字符串中 filter这样的解决方案：

：

let story = 'Last weekend, I took literally the most beautiful bike ride of my life. The route is called "The 9W to Nyack" and it actually stretches all the way from Riverside Park in Manhattan to South Nyack, New Jersey. It's really an adventure from beginning to end! It is a 48 mile loop and it basically took me an entire day. I stopped at Riverbank State Park to take some extremely artsy photos. It was a short stop, though, because I had a really long way left to go. After a quick photo op at the very popular Little Red Lighthouse, I began my trek across the George Washington Bridge into New Jersey.  The GW is actually very long - 4,760 feet! I was already very tired by the time I got to the other side.  An hour later, I reached Greenbrook Nature Sanctuary, an extremely beautiful park along the coast of the Hudson.  Something that was very surprising to me was that near the end of the route you actually cross back into New York! At this point, you are very close to the end.';
let overusedWords = ['really', 'very', 'basically'];
const storyWords = story.split(' ');
const result = overusedWords.map(word=>{
    return {
        word,
        count:storyWords.filter(sWord=>sWord==word).length
    }
});

尽管我不确定它的效率有多高。