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:
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:
Live Demo:
See the Pen JavaScript Find a word within a string - string-ex-29 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript function to convert Hexadecimal to ASCII format.
Next: Write a JavaScript function check if a string ends with specified suffix.
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JavaScript: Tips of the Day
How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
Ref: https://bit.ly/2BXbp04
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