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3.12 LAB: JavaScript Arrays Implement the function calcWordFrequencies() that uses a single prompt to read a...

3.12 LAB: JavaScript Arrays

Implement the function calcWordFrequencies() that uses a single prompt to read a list of words (separated by spaces). Then, the function outputs those words and their frequencies to the console.

Ex: If the prompt input is:

hey hi Mark hi mark

the console output is:

hey 1
hi 2
Mark 1
hi 2
mark 1

Note: To test the JavaScript locally, call the calcWordFrequencies() function from the JavaScript console in the browser.

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Answer #1


The javascript function ,calcWordFrequencies that prompts user to enter the word list and split by space.Then user the array to count the frequency of each word in the words list. Then show the word and its corresponding frequency count to console
output.

Save the below file as frequency.html

<!DOCTYPE html>
<html>
<head>
   <script type="text/javascript">
       function calcWordFrequencies() {
let words = prompt("Enter word list ").split(" ");

           let frequency = {};
          
for (var i = 0; i < words.length; i++) {

       if (!frequency[words[i]]) {
frequency[words[i]]=1;
} else {
frequency[words[i]]++;
}
}

for (var i = 0; i < words.length; i++) {
console.log(words[i]+ " " +frequency[words[i]]);
}
}
       calcWordFrequencies();
   </script>
</head>

<body>
</body></html>

Sample Output:

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