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JavaScript: Find a word within a string

JavaScript String: Exercise-29 with Solution

Write a JavaScript function to find a word within a string.

Test Data:
console.log(search_word('The quick brown fox', 'fox'));
console.log(search_word('aa, bb, cc, dd, aa', 'aa'));
Output:
"'fox' was found 1 times."
"'aa' was found 2 times."

Pictorial Presentation:

JavaScript: Find a word within a string

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to find a word within a string</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function search_word(text, word){
    
    var x = 0, y=0;
   
    for (i=0;i< text.length;i++)
        {
        if(text[i] == word[0])
            {
            for(j=i;j< i+word.length;j++)
               {
                if(text[j]==word[j-i])
                  {
                    y++;
                  }
                if (y==word.length){
                    x++;
                }
            }
            y=0;
        }
    }
   return "'"+word+"' was found "+x+" times.";
}

console.log(search_word('The quick brown fox', 'fox'));
console.log(search_word('aa, bb, cc, dd, aa', 'aa'));

Sample Output:

'fox' was found 1 times.
'aa' was found 2 times.

Flowchart:

Flowchart: JavaScript- Find a word within a string

Live Demo:

See the Pen JavaScript Find a word within a string - string-ex-29 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript function check if a string ends with specified suffix.

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JavaScript: Tips of the Day

var functionName = function() {} vs function functionName() {}

The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).

For example, a function expression:

// TypeError: functionOne is not a function
functionOne();

var functionOne = function() {
  console.log("Hello!");
};

Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.

'use strict';    
{ // note this block!
  function functionThree() {
    console.log("Hello!");
  }
}
functionThree(); // ReferenceError

Ref: https://bit.ly/2zMAj1O