JavaScript Archives - Page 2 of 29 -

Get the first two characters of string JavaScript | Example code

Posted April 7, 2021April 14, 2021 by Rohit

Get first two characters of string JavaScript HTML example code You can use inbuilt slice method to get first 2 characters of a string in JavaScript. Pass index value 0 for start and 1 for end.

<!DOCTYPE HTML> 
<html> 

<body> 

	<script>
		var str = "Hello world, Simple example";
		
		var strFirst2 = str.substring(0,2);

		alert(strFirst2);
	</script>
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "Hello world, Simple example";

var strFirst2 = str.substring(0,2);

alert(strFirst2);

</script>

</body>

</html>

Output: Do comment if you have any doubts and suggestions on this JS char topic. RohitDegree in Computer Read More…

Get the middle character JavaScript | Extracting middle of a string example

Posted April 5, 2021April 8, 2021 by Rohit

Get the middle character JavaScript Example code: Let’s Create a function that returns the middle character/s of a sentence.

<!DOCTYPE HTML> 
<html> 

<body> 

	<script>
		var str = "This is an simple sentence.";
		function extractMiddle(str) {

			var position;
			var length;

			if(str.length % 2 == 1) {
				position = str.length / 2;
				length = 1;
			} else {
				position = str.length / 2 - 1;
				length = 2;
			}

			return str.substring(position, position + length)
		}

		console.log(extractMiddle(str));

	</script> 
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "This is an simple sentence.";

function extractMiddle(str) {

var position;

var length;

if(str.length % 2 == 1) {

position = str.length / 2;

length = 1;

} else {

position = str.length / 2 - 1;

length = 2;

}

return str.substring(position, position + length)

}

console.log(extractMiddle(str));

</script>

</body>

</html>

Output: Do comment if you have any doubts and suggestions on this example code. RohitDegree in Computer Science and Engineer: App Developer and has multiple Programming languages experience. Enthusiasm for technology & like learning technical.

JavaScript split a sentence into an array of words | Example code

Posted April 3, 2021April 13, 2021 by Rohit

Just use the split method to convert sentences into an array of words in JavaScript. You have to use a separator which uses to indicating where each split should occur. We will use a space separator, you can use a comma or another. JavaScript split a sentence into an array of words Example HTML example Read More…

JavaScript split a sentence into words | Example code

Posted April 3, 2021April 8, 2021 by Rohit

Just use the split method to split a sentence into words in JavaScript. You can also use it for loop iteration. In both ways, you have to use the space option for separating normal sentences. JavaScript split the sentence into words Example code HTML example code:- Using split method It will return array without space. Read More…

Loop through words in a string JavaScript | Iterate words in a string in JS

Posted April 3, 2021April 7, 2021 by Rohit

Simple for loop can use for in Loop through words in a string JavaScript. And for iterate words in string use split, map, and join methods (functions). Loop through words in a string JavaScript Example

<!DOCTYPE HTML> 
<html> 

<body> 

	<script>
		var str = "Hello world"
		for (var i = 0; i < str.length; i++) {
			console.log(str.charAt(i));
		}

	</script> 
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "Hello world"

for (var i = 0; i < str.length; i++) {

console.log(str.charAt(i));

}

</script>

</body>

</html>

Output: Iterate words in string in JS Example code

<!DOCTYPE HTML> 
<html> 

<body> 

	<script>
		var str = "Hello world"
		function getStr(str) {
			return str.split('')
			.map(item => item)
			.join('')
		}
		
		console.log(getStr(str));				

	</script> 
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "Hello world"

function getStr(str) {

return str.split('')

.map(item => item)

.join('')

}

console.log(getStr(str));

</script>

</body>

</html>

Output: Do comment if you have any doubts and Read More…

Get word from string JavaScript | Extract a specific word example

Posted April 3, 2021April 5, 2021 by Rohit

Use split and some function or regex with word boundaries to find or Extract a specific word from string in JavaScript. Get word from string JavaScript Example HTML example code: Match if word present in given string. Using split and some function If word found then return true.

<!DOCTYPE HTML> 
<html> 

<body> 

	<script> 
		var str = "Remove the last word.";

		function findWord(word, str) {
			return str.split(' ').some(function(w){return w === word})
		}

		console.log(findWord("last",str));
	</script> 
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "Remove the last word.";

function findWord(word, str) {

return str.split(' ').some(function(w){return w === word})

}

console.log(findWord("last",str));

</script>

</body>

</html>

Using a regex with word boundaries: Read More…

Get the first word of string JavaScript | Example code

Posted April 3, 2021April 7, 2021 by Rohit

Use split method with 0 index to get the Get the only first word of string in JavaScript. Split method return an array, so you can easily get first element.

> "hey there".split(" ")[0]
"hey"

1 2	> "hey there".split(" ")[0] "hey"

Get the first word of string JavaScript example HTML example code: You need to split the string by space and the get only 0 Read More…

Get the last word from string JavaScript | Example code

Posted April 2, 2021April 2, 2021 by Rohit

Use Regular expression or with replace and split method to get the the last word from string JavaScript. It’s not only way to get last word from string you can use split or inbuilt lastIndexof with substring method. Get the last word from string JavaScript example code HTML example code:- Regular expression A strips all Read More…

JavaScript remove the last word from a string | Example code

Posted April 1, 2021April 2, 2021 by Rohit

The simplest way to get remove the last word from a string in JavaScript Using string.substring() Function. There are many ways and methods. We will see the other method with examples in this tutorial. JavaScript remove the last word from a string Example HTML example code:- Using substring() Function The lastIndexOf() function is used to Read More…

JS get a random element from the Array | Example code

Posted March 25, 2021March 26, 2021 by Rohit

You can get a random element from the Array in JS by using Math.random() function to get the random number then Multiply it by the array length. After it, you will get numbers between zero to array length. Last use Math.floor() to get the index number from 0 to arrayLength-1. JS get a random element Read More…