How to determine the frequency of a specific word in a sentence using Angular 5

I need help finding a solution to count how many times a word appears in sentences.

Input:
k = 2
keywords = ["anacell", "cetracular", "betacellular"]
reviews = [
  "Anacell provides the best services in the city",
  "betacellular has awesome services",
  "Best services provided by anacell, everyone should use anacell",
]

Output:
["anacell", "betacellular"]

Explanation:
"anacell" appears in 2 reviews and "betacellular" only appears in 1 review.

Input:
k = 2
keywords = ["anacell", "betacellular", "cetracular", "deltacellular", "eurocell"]
reviews = [
  "I love anacell Best services; Best services provided by anacell",
  "betacellular has great services",
  "deltacellular provides much better services than betacellular",
  "cetracular is worse than anacell",
  "Betacellular is better than deltacellular.",
]

Output:
["betacellular", "anacell"]

Explanation:
"betacellular" appears in 3 reviews. "anacell" and "deltacellular" appear in 2 reviews, but "anacell" comes first alphabetically.

Using the keywords provided, I want to determine their frequencies in the reviews array and display the most frequently occurring keyword.

javascriptangulartypescript

Answer №1

analyzeKeywords(keywords: string[], reviews: string[]) => {
    let outcome = [];

    keywords.forEach(keyword => {
        let info = {};
        info.keyword = keyword;
        info.review_total = 0;

        reviews.forEach(review => {
            if (review.toLowerCase().includes(keyword.toLowerCase())) {
                info.review_total += 1;
            }
        })

        outcome.push(info);
    })

    return outcome;
}

Returns an Array of Objects containing relevant data.

https://i.stack.imgur.com/i9uoM.png

Answer №2

Check out the following code snippet to count how many times keywords appear:

let occurrencesMap:any
this.keywords.forEach((keyword)=>
{
  let temp=0;
 this.reviews.forEach((review)=>{
   if(review.indexOf(keyword)>-1){
     temp++
    }
 });
  occurrencesMap[keyword]=temp
})

console.log(occurrencesMap['anacell'])

Answer №3

const searchWords = ["anacell", "cetracular", "betacellular"];
const customerReviews = [
    "Anacell provides the best services in the city",
    "betacellular has awesome services",
    "Best services provided by anacell, everyone should use anacell",
];

let matchedKeywords = [];
for (const word of searchWords)
    for (const review of customerReviews) {
        const lowerCaseReview = review.toLowerCase();
        const lowerCaseWord = word.toLowerCase();
        if (matchedKeywords.indexOf(lowerCaseWord) < 0 && lowerCaseReview.indexOf(lowerCaseWord) >= 0)
            matchedKeywords.push(word);
    }
console.log(matchedKeywords);

Answer №4

Integrated the jamesmallred function to enhance sorting and splice operations.

countKeywords(keywords: string[], reviews: string[]) => {
    let result = [];

    keywords.forEach(key => {
        let data = {};
        data.keyword = key;
        data.count = 0;

        reviews.forEach(review => {
            if (review.toLowerCase().includes(key.toLowerCase())) {
                data.count += 1;
            }
        })

        result.push(data);
    })

    return result;
}

//sorting 

 result.sort((a,b) => {
            if(b.keyword === a.keyword) {
                return a.keyword.localeCompare(b.keyword); // sort alphabetically if equal
            }
            else {
                return b.keyword - a.keyword // sort from highest to lowest 
            }

        });
        
        
//splice based on the input

result.splice(0,k);

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