![](http://satech360.com/wp-content/uploads/2020/04/Properties-and-Methods-in-JavaScript.jpg)
JavaScript āĻ āĻ¸āĻŦāĻāĻŋāĻā§āĻ object āĻ¤āĻžāĻ āĻāĻāĻžāĻ¨ā§ array āĻ āĻāĻāĻāĻž object . āĻāĻ° āĻ āĻ¨ā§āĻ¯āĻžāĻ¨ā§āĻ¯ object āĻāĻ° āĻŽāĻ¤ā§āĻ JavaScript array object āĻāĻ° āĻāĻā§ āĻ āĻ¨ā§āĻ āĻā§āĻ˛ā§ properties āĻāĻŦāĻ Methods . āĻāĻāĻā§āĻ° āĻĒāĻ°ā§āĻŦā§ āĻāĻŽāĻ°āĻž JavaScript array Object āĻāĻ° Properties āĻāĻŦāĻ Methods āĻā§āĻ˛ā§ āĻ¨āĻŋāĻ¯āĻŧā§ āĻāĻ˛ā§āĻāĻ¨āĻž āĻāĻ°āĻŦāĨ¤
JavaScript āĻ āĻāĻāĻāĻž array āĻ¤ā§ āĻāĻ¤āĻā§āĻ˛ā§ āĻāĻ˛āĻŋāĻŽā§āĻ¨ā§āĻ āĻāĻā§ āĻ¤āĻž āĻāĻŋāĻāĻžāĻŦā§ āĻāĻžāĻ¨āĻŦ ?
JavaScript āĻ āĻāĻāĻāĻž array āĻ¤ā§ āĻāĻ¤āĻā§āĻ˛ā§ āĻāĻ˛āĻŋāĻŽā§āĻ¨ā§āĻ āĻāĻā§ āĻ¤āĻž āĻāĻžāĻ¨āĻ¤ā§ āĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ JavaScript āĻāĻ° array Object āĻāĻ° length property āĻāĻŋ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖ āĻĻāĻŋāĻ¯āĻŧā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits.length;
</script>
</body>
</html>
Output
4
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻ¸āĻ°ā§āĻŦāĻļā§āĻˇ āĻāĻ˛āĻŋāĻŽā§āĻ¨ā§āĻ āĻā§āĻ¨āĻāĻž āĻ¤āĻž āĻāĻŋāĻāĻžāĻŦā§ āĻāĻžāĻ¨āĻŦ?
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻ¸āĻ°ā§āĻŦāĻļā§āĻˇ āĻāĻ˛āĻŋāĻŽā§āĻ¨ā§āĻ āĻā§āĻ¨āĻāĻž āĻ¤āĻž āĻāĻžāĻ¨āĻžāĻ° āĻāĻ¨ā§āĻ¯ āĻāĻĒāĻ¨āĻŋ JavaScript āĻāĻ° lenght property āĻāĻ° āĻ¸āĻžāĻšāĻžāĻ¯ā§āĻ¯ āĻ¨āĻŋāĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤ āĻ¨āĻŋāĻā§āĻ° āĻāĻĻāĻžāĻšāĻ°āĻŖ āĻ˛āĻā§āĻˇā§āĻ¯ āĻāĻ°ā§āĻ¨
Output
Mango
<p id="demo"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var last = fruits[fruits.length-1];
document.getElementById("demo").innerHTML = last;
</script>
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° value āĻā§āĻ˛ā§ āĻāĻŋāĻāĻžāĻŦā§ āĻ¨āĻŋāĻā§āĻ° āĻŽāĻ¤ā§ āĻŦāĻž customize āĻāĻ°ā§ āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°āĻŦāĨ¤
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° value āĻā§āĻ˛ā§āĻā§ āĻ¨āĻŋāĻā§āĻ° āĻŽāĻ¤ā§ āĻŦāĻž customize āĻāĻ°ā§ āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°āĻžāĻ° āĻāĻ¨ā§āĻ¯ āĻāĻŽāĻ°āĻž JavaScript for loop āĻāĻŦāĻ length property āĻā§ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤ āĻ¨āĻŋāĻā§āĻ° āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻ˛āĻā§āĻˇā§āĻ¯ āĻāĻ°ā§
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
fruits = ["Banana", "Orange", "Apple", "Mango"];
text = "<ul>";
for (i = 0; i < fruits.length; i++) {
text += "<li>" + fruits[i] + "</li>";
}
text += "</ul>";
document.getElementById("demo").innerHTML = text;
</script>
</body>
</html>
Output
- Banana
- Orange
- Apple
- Mango
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° value āĻā§āĻ˛ā§āĻā§ āĻāĻŋāĻāĻžāĻŦā§ string āĻāĻāĻžāĻ°ā§ āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°āĻŦ?
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° value āĻā§āĻ˛ā§āĻā§ string āĻāĻāĻžāĻ°ā§ āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°āĻ¤ā§ āĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ toString() Method āĻ āĻĨāĻŦāĻž join() Method āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻā§āĻˇā§āĻ¤ā§āĻ°ā§ toString() āĻŽā§āĻĨāĻĄ āĻŦāĻžāĻ āĻĄāĻŋāĻĢāĻ˛ā§āĻ array āĻāĻ° value āĻā§āĻ˛ā§āĻā§ āĻāĻŽāĻž (,) āĻĻāĻŋāĻ¯āĻŧā§ āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°ā§ , āĻ āĻ¨ā§āĻ¯āĻĻāĻŋāĻā§ join() Method āĻ āĻāĻĒāĻ¨āĻŋ āĻāĻžāĻāĻ˛ā§ āĻ¨āĻŋāĻāĻ¸ā§āĻŦ separator āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤ āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML = "<b>toString() Method Result:</b> "+fruits.toString();
document.getElementById("demo2").innerHTML = "<b>join() Method Result:</b> "+fruits.join("*");
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-toString-and-Join-Method-1.png)
JavaScript āĻ āĻāĻāĻāĻž array āĻ¤ā§ āĻāĻŋāĻāĻžāĻŦā§ āĻ¨āĻ¤ā§āĻ¨ Element āĻ¯ā§āĻā§āĻ¤ āĻ āĻĨāĻŦāĻž remove āĻāĻ°āĻŦā§āĻ¨?
JavaScript āĻ āĻāĻāĻāĻž array āĻ¤ā§ āĻā§āĻ¨ā§ Element āĻ¯ā§āĻā§āĻ¤ āĻ āĻĨāĻŦāĻž āĻ°āĻŋāĻŽā§āĻ āĻāĻ°āĻžāĻ° āĻāĻ¨ā§āĻ¯ JavaScript āĻāĻ° push,pop,shift,unshift āĻāĻŦāĻ splice āĻāĻ āĻŽā§āĻĨāĻĄ āĻā§āĻ˛ā§ āĻŦā§āĻ¯āĻŦāĻšā§āĻ¤ āĻšāĻ¯āĻŧāĨ¤ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻāĻāĻž āĻāĻ°ā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
JavaScript push() Method
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻļā§āĻˇā§ āĻā§āĻ¨ā§ value āĻ¯ā§āĻā§āĻ¤ āĻāĻ°āĻ¤ā§ push() Method āĻŦā§āĻ¯āĻŦāĻšā§āĻ¤ āĻšāĻ¯āĻŧāĨ¤
<!DOCTYPE html>
<html>
<body>
<button onclick="pushValue()">Add value to the end</button>
<p id="demo"></p>
<p id="demo1"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = "<b>Current Array Before Push:</b> "+ fruits;
function pushValue() {
fruits.push("Kiwi");
document.getElementById("demo1").innerHTML = "<b>Current Array After Push:</b> "+fruits;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Array-Push-Method.png)
āĻ¨ā§āĻ: push() Method āĻ°āĻŋāĻāĻžāĻ°ā§āĻ¨ value āĻšāĻŋāĻ¸ā§āĻŦā§ array āĻ¤ā§ āĻ¨āĻ¤ā§āĻ¨ value āĻ¯ā§āĻā§āĻ¤ āĻāĻ°āĻžāĻ° āĻĒāĻ° array āĻāĻ° āĻŦāĻ°ā§āĻ¤āĻŽāĻžāĻ¨ length āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°ā§āĨ¤
JavaScript pop() Method
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻļā§āĻˇā§ āĻĨā§āĻā§ āĻā§āĻ¨ā§ value āĻ°āĻŋāĻŽā§āĻ āĻŦāĻž āĻŦāĻžāĻĻ āĻĻāĻŋāĻ¤ā§ pop() Method āĻŦā§āĻ¯āĻŦāĻšā§āĻ¤ āĻšāĻ¯āĻŧāĨ¤
<!DOCTYPE html>
<html>
<body>
<button onclick="popValue()">Romve value from end</button>
<p id="demo"></p>
<p id="demo1"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = "<b>Current Array Before POP:</b> "+ fruits;
function popValue() {
fruits.pop();
document.getElementById("demo1").innerHTML = "<b>Current Array After Pop:</b> "+fruits;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-array-pop.png)
āĻ¨ā§āĻ: pop() Method āĻ°āĻŋāĻāĻžāĻ°ā§āĻ¨ value āĻšāĻŋāĻ¸ā§āĻŦā§ array āĻ¤ā§ āĻĨā§āĻā§ āĻ¯ā§āĻ value āĻāĻŋ āĻ°āĻŋāĻŽā§āĻ āĻāĻ°āĻž āĻšāĻ¯āĻŧā§āĻā§ āĻ¸ā§āĻāĻŋ āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°ā§āĨ¤
JavaScript shift Method
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻļā§āĻ°ā§ āĻĨā§āĻā§ āĻā§āĻ¨ā§ value āĻ°āĻŋāĻŽā§āĻ āĻŦāĻž āĻŦāĻžāĻĻ āĻĻāĻŋāĻ¤ā§ shift() Method āĻŦā§āĻ¯āĻŦāĻšā§āĻ¤ āĻšāĻ¯āĻŧāĨ¤
<!DOCTYPE html>
<html>
<body>
<button onclick="popValue()">Romve value from end</button>
<p id="demo"></p>
<p id="demo1"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = "<b>Current Array Before POP:</b> "+ fruits;
function popValue() {
fruits.pop();
document.getElementById("demo1").innerHTML = "<b>Current Array After Pop:</b> "+fruits;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-array-Shift-Method.png)
āĻ¨ā§āĻ: shift() Method āĻ°āĻŋāĻāĻžāĻ°ā§āĻ¨ value āĻšāĻŋāĻ¸ā§āĻŦā§ array āĻ¤ā§ āĻĨā§āĻā§ āĻ¯ā§āĻ value āĻāĻŋ āĻ°āĻŋāĻŽā§āĻ āĻāĻ°āĻž āĻšāĻ¯āĻŧā§āĻā§ āĻ¸ā§āĻāĻŋ āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°ā§āĨ¤
JavaScript unshift Method
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻļā§āĻ°ā§ āĻ¤ā§ āĻā§āĻ¨ā§ value āĻ¯ā§āĻā§āĻ¤ āĻāĻ°āĻ¤ā§ unshift() Method āĻŦā§āĻ¯āĻŦāĻšā§āĻ¤ āĻšāĻ¯āĻŧāĨ¤
<!DOCTYPE html>
<html>
<body>
<button onclick="shiftValue()">Romve value from Start</button>
<p id="demo"></p>
<p id="demo1"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = "<b>Current Array Before Shift:</b> "+ fruits;
function shiftValue() {
fruits.shift();
document.getElementById("demo1").innerHTML = "<b>Current Array After Shift:</b> "+fruits;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Unshift-Method.png)
āĻ¨ā§āĻ: unshift() Method āĻ°āĻŋāĻāĻžāĻ°ā§āĻ¨ value āĻšāĻŋāĻ¸ā§āĻŦā§ array āĻ¤ā§ āĻ¨āĻ¤ā§āĻ¨ value āĻ¯ā§āĻā§āĻ¤ āĻāĻ°āĻžāĻ° āĻĒāĻ° array āĻāĻ° āĻŦāĻ°ā§āĻ¤āĻŽāĻžāĻ¨ length āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°ā§āĨ¤
JavaScript Array splice() Method
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻļā§āĻ°ā§ , āĻļā§āĻˇā§ āĻāĻŽāĻ¨āĻāĻŋ āĻŽāĻ§ā§āĻ¯āĻŦāĻ°ā§āĻ¤āĻŋ āĻ¯ā§ āĻāĻžāĻ¯āĻŧāĻāĻžāĻ¤ā§ āĻā§āĻ¨ā§ value āĻ¯ā§āĻā§āĻ¤ āĻāĻ°āĻ¤ā§ splice() Method āĻŦā§āĻ¯āĻŦāĻšā§āĻ¤ āĻšāĻ¯āĻŧāĨ¤
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Array Methods</h2>
<h2>splice()</h2>
<p>The splice() method adds new elements to an array.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML = "Original Array:<br>" + fruits;
function myFunction() {
fruits.splice(2, 0, "Lemon", "Kiwi");
document.getElementById("demo2").innerHTML = "New Array:<br>" + fruits;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Array-Splice-Method.png)
āĻ¤āĻŦā§ āĻāĻĒāĻ¨āĻŋ āĻāĻžāĻāĻ˛ā§ splice() Method āĻĻāĻŋāĻ¯āĻŧā§ array āĻāĻ° āĻ¯ā§āĻā§āĻ¨ā§ element āĻā§ remove āĻ āĻāĻ°āĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤
<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">Try it</button>
<p id="demo1"></p>
<p id="demo2"></p>
<p id="demo3"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML = "Original Array:<br> " + fruits;
function myFunction() {
var removed = fruits.splice(2, 2, "Lemon", "Kiwi");
document.getElementById("demo2").innerHTML = "New Array:<br>" + fruits;
document.getElementById("demo3").innerHTML = "Removed Items:<br> " + removed;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Array-splice-with-Remove-element-Feature.png)
JavaScript āĻ āĻāĻŋāĻāĻžāĻŦā§ āĻĻā§āĻ āĻŦāĻž āĻ¤āĻ¤ā§āĻ§āĻŋāĻ array āĻā§ merge āĻāĻ°āĻŦā§āĻ¨?
JavaScript āĻ āĻĻā§āĻ āĻŦāĻž āĻ¤āĻ¤ā§āĻ§āĻŋāĻ array āĻā§ merge āĻāĻ°āĻžāĻ° āĻāĻ¨ā§āĻ¯ concat() method āĻāĻŋ āĻŦā§āĻ¯āĻŦāĻšā§āĻ¤ āĻšāĻ¯āĻŧāĨ¤ āĻāĻ˛ā§āĻ¨ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var list1 = ["Sahin", "Ikram"];
var list2 = ["Ridoy", "Sourov", "tariqul"];
var all = list1.concat(list2);
document.getElementById("demo").innerHTML = all;
</script>
</body>
</html>
Output
Sahin,Ikram,Ridoy,Sourov,tariqul
āĻāĻŦāĻžāĻ° āĻ¤āĻŋāĻ¨āĻāĻŋ array āĻā§ āĻĻāĻŋāĻ¯āĻŧā§ merge āĻāĻ° āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var arr1 = ["Sukanto", "Taposh"];
var arr2 = ["Ikram", "Toriqul", "Sourov"];
var arr3 = ["Hridory Roy", "Sahin"];
var myStudents = arr1.concat(arr2, arr3);
document.getElementById("demo").innerHTML = myStudents;
</script>
</body>
</html>
Output
Sukanto,Taposh,Ikram,Toriqul,Sourov,Hridory Roy,Sahin
JavaScript āĻ āĻāĻŋāĻāĻžāĻŦā§ āĻāĻāĻāĻž array āĻāĻ° āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ āĻ āĻāĻļ āĻā§āĻā§ āĻ¨āĻŋāĻ¯āĻŧā§ āĻ¨āĻ¤ā§āĻ¨ āĻāĻāĻāĻž array āĻ¤ā§āĻ°ā§ āĻāĻ°āĻŦā§āĻ¨?
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ āĻ āĻāĻļ āĻā§āĻā§ āĻ¨āĻŋāĻ¯āĻŧā§ āĻ¨āĻ¤ā§āĻ¨ āĻāĻāĻāĻž array āĻ¤ā§āĻ°ā§ āĻāĻ°āĻ¤ā§ āĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ slice() Method āĻāĻŋ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = fruits.slice(0,2);
document.getElementById("demo").innerHTML = "<b>Original Array:</b> "+fruits + "<br><br> <b>New Array: </b>" + citrus;
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Array-Slice-Example.png)
āĻ¤āĻŦā§ āĻāĻĒāĻ¨āĻŋ āĻāĻžāĻāĻ˛ā§ slice() Method āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°ā§ āĻāĻŋāĻā§ Element āĻŦāĻžāĻĻ āĻĻāĻŋāĻ¯āĻŧā§ āĻŦāĻžāĻāĻŋāĻā§āĻ˛ā§āĻā§ āĻ¨āĻŋāĻ¯āĻŧā§āĻ āĻāĻāĻāĻž āĻ¨āĻ¤ā§āĻ¨ array āĻ¤ā§āĻ°ā§ āĻāĻ°āĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Array-Slice-Example-2.png)
JavaScript āĻ array element āĻā§āĻ˛ā§āĻā§ āĻāĻŋāĻāĻžāĻŦā§ alphabetically sort āĻāĻ°āĻŦā§āĻ¨ ?
JavaScript āĻ array element āĻā§āĻ˛ā§āĻā§ alphabetically sort āĻāĻ°āĻ¤ā§ āĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ sort() Method āĻāĻŋ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻ˛ā§āĻ¨ āĻāĻĻāĻžāĻšāĻ°āĻŖ āĻĻāĻŋāĻ¯āĻŧā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">Sort It</button>
<p id="demo"></p>
<p id="output"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = "<b>Original Array:</b>"+fruits;
function myFunction() {
fruits.sort();
document.getElementById("output").innerHTML = "<b>Sorted Array:</b>"+fruits;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Array-Alphabatically-Sort.png)
JavaScript āĻ array element āĻā§āĻ˛ā§āĻā§ āĻāĻŋāĻāĻžāĻŦā§ reverse āĻ āĻ°ā§āĻĄāĻžāĻ°ā§ sort āĻāĻ°āĻŦā§āĻ¨?
JavaScript āĻ array element āĻā§āĻ˛ā§āĻā§ reverse āĻ āĻ°ā§āĻĄāĻžāĻ°ā§ sort āĻāĻ°āĻžāĻ° āĻāĻ¨ā§āĻ¯ āĻāĻĒāĻ¨āĻŋ reverse() Method āĻāĻŋ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Array-Reverse-Sort.png)
JavaScript āĻ Numerical array āĻāĻ° element āĻā§āĻ˛ā§āĻā§ āĻāĻŋāĻāĻžāĻŦā§ sort āĻāĻ°āĻŦā§āĻ¨ ?
JavaScript āĻ Numerical array āĻāĻ° element āĻā§āĻ˛ā§āĻā§ sort āĻāĻ°āĻ¤ā§ āĻšāĻ˛ā§ āĻ¨āĻŋāĻā§āĻ° āĻā§āĻāĻ¨āĻŋāĻ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§ , āĻāĻ˛ā§āĻ¨ āĻĻā§āĻāĻž āĻ¯āĻžāĻāĨ¤
<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">Reverse it</button>
<p id="demo"></p>
<p id="output"></p>
<script>
// Create and display an array:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = "<b>Origianl Array: </b>"+fruits;
function myFunction() {
fruits.reverse();
document.getElementById("output").innerHTML = "<b>Reverse Array: </b>"+fruits;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/JavaScript-Numerical-Array-Sorting.png)
āĻ¤āĻŦā§ āĻāĻĒāĻ¨āĻŋ āĻāĻžāĻāĻ˛ā§ JavaScript āĻ Numerical array āĻāĻ° element āĻā§āĻ˛ā§āĻā§ descending āĻ āĻ°ā§āĻĄāĻžāĻ°ā§ sort āĻāĻ°āĻ¤ā§ āĻšāĻ˛ā§āĻ āĻāĻā§āĻ° āĻā§āĻāĻ¨āĻŋāĻ āĻāĻŋāĻ° āĻ¸āĻžāĻŽāĻžāĻ¨ā§āĻ¯ āĻĒāĻ°āĻŋāĻŦāĻ°ā§āĻ¤āĻ¨ āĻāĻ°ā§ āĻĻāĻŋāĻ˛ā§āĻ āĻšāĻŦā§ , āĻāĻ˛ā§āĻ¨ āĻĻā§āĻāĻž āĻ¯āĻžāĻāĨ¤
Output
![](http://satech360.com/wp-content/uploads/2020/04/sort2.png)
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž Item āĻā§ āĻāĻŋāĻāĻžāĻŦā§ Iterate āĻāĻ°āĻŦā§āĻ¨ ?
JavaScript āĻ āĻāĻāĻāĻž array āĻāĻ° āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž Item āĻā§ Iterate āĻāĻ°āĻžāĻ° āĻāĻ¨ā§āĻ¯ āĻāĻŽāĻžāĻĻā§āĻ° āĻā§ JavaScript Iterator Method āĻā§āĻ˛ā§ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻ˛ā§āĻ¨ āĻāĻā§ āĻāĻā§ āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻŋ Iterator Method āĻ¸āĻŽā§āĻĒāĻ°ā§āĻā§ āĻāĻžāĻ¨āĻž āĻ¯āĻžāĻ :
JavaScript āĻ forEach Iterator Method āĻāĻ° āĻāĻžāĻ āĻāĻŋ?
JavaScript āĻ forEach Iterator Method āĻāĻ° āĻāĻžāĻ āĻšāĻā§āĻā§ āĻāĻāĻāĻž array āĻāĻ° āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž element āĻ iterate āĻāĻ°āĻžāĨ¤ āĻāĻ° āĻ¤āĻžāĻ āĻāĻĒāĻ¨āĻŋ āĻāĻžāĻāĻ˛ā§ forEach() Method āĻĻāĻŋāĻ¯āĻŧā§ āĻ¯ā§āĻā§āĻ¨ā§ array key āĻāĻŦāĻ value āĻā§āĻ˛ā§ āĻ¨āĻŋāĻ¯āĻŧā§ āĻāĻžāĻ āĻāĻ°āĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">Sort it</button>
<p id="demo"></p>
<p id="output"></p>
<script>
var points = [40, 100, 1, 5, 25, 10];
document.getElementById("demo").innerHTML = "<b>Original Array:</b> "+points;
function myFunction() {
points.sort(function(a, b){return b-a});
document.getElementById("output").innerHTML = "<b>Sorted Array: </b>"+points;
}
</script>
</body>
</html>
Output
![](http://satech360.com/wp-content/uploads/2020/04/js-foreach.png)
JavaScript āĻ map() Iterator Method āĻāĻ° āĻāĻžāĻ āĻāĻŋ?
JavaScript āĻ map() Iterator Method āĻāĻ° āĻāĻžāĻ āĻšāĻā§āĻā§ āĻāĻāĻāĻž array āĻāĻ° āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž element āĻ iterate āĻāĻ°āĻž āĻāĻŦāĻ āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž element āĻāĻ° āĻāĻĒāĻ°ā§ āĻ¯ā§āĻā§āĻ¨ā§ operation āĻāĻ°āĻžāĻ° āĻ¸ā§āĻ¯ā§āĻ āĻ¸ā§āĻˇā§āĻāĻŋ āĻāĻ°āĻžāĨ¤ āĻāĻ° āĻāĻ āĻāĻžāĻāĻāĻŋ āĻāĻ°āĻ¤ā§ āĻšāĻ¯āĻŧ āĻāĻāĻāĻž callback āĻĢāĻžāĻā§āĻāĻļāĻ¨ā§āĻ° āĻŽāĻžāĻ§ā§āĻ¯āĻŽā§āĨ¤ āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
Output
JavaScript āĻ filter Iterator Method āĻāĻ° āĻāĻžāĻ āĻāĻŋ?
JavaScript āĻ filter() Iterator Method āĻāĻ° āĻāĻžāĻ āĻšāĻā§āĻā§ āĻāĻāĻāĻž array āĻāĻ° āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž element āĻ iterate āĻāĻ°āĻž āĻāĻŦāĻ āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž element āĻāĻ° āĻāĻĒāĻ°ā§ āĻ¯ā§āĻā§āĻ¨ā§ filtering operation āĻāĻ°āĻžāĻ° āĻ¸ā§āĻ¯ā§āĻ āĻ¸ā§āĻˇā§āĻāĻŋ āĻāĻ°āĻžāĨ¤ āĻāĻ° āĻāĻ āĻāĻžāĻāĻāĻŋ āĻāĻ°āĻ¤ā§ āĻšāĻ¯āĻŧ āĻāĻāĻāĻž callback āĻĢāĻžāĻā§āĻāĻļāĻ¨ā§āĻ° āĻŽāĻžāĻ§ā§āĻ¯āĻŽā§āĨ¤ āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers1 = [1,2,3,4,5,6];
var numbers2 = numbers1.map(myFunction);
document.getElementById("demo").innerHTML = numbers2;
function myFunction(value, index, array) {
return value * 2;
}
</script>
</body>
</html>
Output
2,4,6,8,10,12
JavaScript āĻ reduce() Iterator Method āĻāĻ° āĻāĻžāĻ āĻāĻŋ?
JavaScript āĻ reduce() Iterator Method āĻāĻ° āĻāĻžāĻ āĻšāĻā§āĻā§ āĻāĻāĻāĻž array āĻāĻ° āĻĒā§āĻ°āĻ¤ā§āĻ¯ā§āĻāĻāĻž element āĻ iterate āĻāĻ°āĻž āĻāĻŦāĻ āĻ¸āĻŦāĻā§āĻ˛ā§ element āĻā§ āĻāĻāĻāĻž value āĻ¤ā§ āĻ°ā§āĻĒāĻžāĻ¨ā§āĻ¤āĻ° āĻāĻ°āĻžāĻ° āĻ¸ā§āĻ¯ā§āĻ āĻ¸ā§āĻˇā§āĻāĻŋ āĻāĻ°āĻžāĨ¤ āĻāĻ° āĻāĻ āĻāĻžāĻāĻāĻŋ āĻāĻ°āĻ¤ā§ āĻšāĻ¯āĻŧ āĻāĻāĻāĻž callback āĻĢāĻžāĻā§āĻāĻļāĻ¨ā§āĻ° āĻŽāĻžāĻ§ā§āĻ¯āĻŽā§āĨ¤ āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
Output
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers = [1, 4, 9, 6, 5];
var sum = numbers.reduce(myFunction);
document.getElementById("demo").innerHTML = "The sum is " + sum;
function myFunction(total, value, index, array) {
return total + value;
}
</script>
</body>
</html>
āĻ¤āĻŦā§ āĻāĻĒāĻ¨āĻŋ āĻāĻžāĻāĻ˛ā§ āĻāĻāĻāĻž initial value āĻĒāĻžāĻ āĻžāĻ¤ā§ āĻĒāĻžāĻ°ā§āĻ¨āĨ¤
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers = [1,2,3,4,5];
var sum = numbers.reduce(myFunction, 10);
document.getElementById("demo").innerHTML = "The sum is " + sum;
function myFunction(total, value) {
return total + value;
}
</script>
</body>
</html>
Output
The sum is 25
JavaScript āĻ reduceRight() Iterator Method āĻāĻ° āĻāĻžāĻ āĻāĻŋ?
JavaScript āĻ reduceRight() Iterator Method āĻāĻ° āĻāĻžāĻ āĻ reduce() Method āĻāĻ° āĻŽāĻ¤ā§āĻāĨ¤ āĻĒāĻžāĻ°ā§āĻĨāĻā§āĻ¯ āĻšāĻā§āĻā§ left-side āĻĨā§āĻā§ āĻāĻžāĻ āĻāĻ°ā§, āĻāĻ° reduceRight right-side āĻĨā§āĻā§ āĻāĻžāĻ āĻāĻ°ā§āĨ¤ āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers = [1,2,3,4,5];
var sum = numbers.reduceRight(myFunction);
document.getElementById("demo").innerHTML = "The sum is " + sum;
function myFunction(total, value, index, array) {
return total + value;
}
</script>
</body>
</html>
Output
The sum is 15
JavaScript āĻ every() Iterator Method āĻāĻ° āĻāĻžāĻ āĻāĻŋ?
JavaScript āĻ every() Iterator Method āĻāĻ° āĻāĻžāĻ āĻšāĻā§āĻā§ array āĻāĻ° āĻĒā§āĻ°āĻ¤āĻŋāĻāĻŋ element āĻāĻāĻāĻž āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ āĻĒāĻ°ā§āĻā§āĻˇāĻžāĻ¯āĻŧ āĻĒāĻžāĻļ āĻāĻŋāĻ¨āĻž āĻ¤āĻž āĻā§āĻ āĻāĻ°āĻž āĨ¤ āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers = [45, 4, 9, 16, 25];
var allOver18 = numbers.every(myFunction);
document.getElementById("demo").innerHTML = allOver18;
function myFunction(value, index, array) {
return value > 18;
}
</script>
</body>
</html>
Output
false
JavaScript āĻ some() Iterator Method āĻāĻ° āĻāĻžāĻ āĻāĻŋ?
JavaScript āĻ some() Iterator Method āĻ āĻ¨ā§āĻāĻāĻž every Method āĻāĻ° āĻŽāĻ¤ā§āĻāĨ¤ āĻĒāĻžāĻ°ā§āĻĨāĻā§āĻ¯ āĻšāĻā§āĻā§ every Method āĻāĻ°ā§ āĻāĻ° āĻ¸āĻŦāĻā§āĻ˛ā§ āĻāĻ˛āĻŋāĻŽā§āĻ¨ā§āĻ āĻāĻāĻāĻž āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ āĻĒāĻ°ā§āĻā§āĻˇāĻžāĻ¯āĻŧ āĻā§āĻ¤āĻāĻžāĻ°ā§āĻ¯ āĻšāĻ¤ā§ āĻšāĻ¯āĻŧ , āĻāĻŋāĻ¨ā§āĻ¤ā§ some Method āĻāĻ° āĻāĻžāĻ āĻšāĻā§āĻā§ array āĻāĻ° āĻāĻŋāĻā§ element āĻāĻāĻāĻž āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ āĻĒāĻ°ā§āĻā§āĻˇāĻžāĻ¯āĻŧ āĻĒāĻžāĻļ āĻšāĻ˛ā§āĻ āĻāĻ˛ā§ āĨ¤ āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers = [45, 4, 9, 16, 25];
var someOver18 = numbers.some(myFunction);
document.getElementById("demo").innerHTML = "Some over 18 is " + someOver18;
function myFunction(value, index, array) {
return value > 18;
}
</script>
</body>
</html>
Output
Some over 18 is true
JavaScript āĻ āĻāĻŋāĻāĻžāĻŦā§ āĻāĻāĻāĻž āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ array element āĻāĻ° position āĻŦā§āĻ° āĻāĻ°āĻŦā§āĻ¨?
JavaScript āĻ āĻāĻāĻāĻž āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ array element āĻāĻ° position āĻŦā§āĻ° āĻāĻ°āĻ¤ā§ āĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ indexOf() Method āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻ˛ā§āĻ¨ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var fruits = ["Apple", "Orange", "Pineapple", "Mango"];
var a = fruits.indexOf("Orange");
document.getElementById("demo").innerHTML = "Orange is found in position " + a;
</script>
</body>
</html>
Output
Orange is found in position 1
āĻ¤āĻŦā§ indexOf Method āĻāĻ°ā§ āĻ¤ā§ āĻļā§āĻ°ā§ āĻĨā§āĻā§ index search āĻāĻ°ā§āĨ¤ āĻāĻ¤ā§ āĻ¸āĻŽāĻ¸ā§āĻ¯āĻž āĻšāĻ¯āĻŧ , āĻ¯āĻĻāĻŋ āĻāĻĒāĻ¨āĻžāĻ° āĻāĻ°ā§ āĻ¤ā§ āĻāĻāĻžāĻ§āĻŋāĻ āĻāĻāĻ value āĻĨāĻžāĻā§ , āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻāĻŋ āĻļā§āĻ°ā§ āĻĨā§āĻā§ āĻ¯āĻžāĻā§ āĻĒāĻžāĻŦā§ , āĻ¤āĻžāĻ° index āĻĒā§āĻ°āĻĻāĻ°ā§āĻļāĻ¨ āĻāĻ°āĻŦā§āĨ¤ āĻāĻā§āĻˇā§āĻ¤ā§āĻ°ā§ āĻāĻĒāĻ¨āĻŋ āĻ¯āĻĻāĻŋ array āĻāĻ° āĻļā§āĻˇā§āĻ° āĻĻāĻŋāĻ āĻĨā§āĻā§ index search āĻāĻ°āĻ¤ā§ āĻāĻžāĻ¨ , āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ lastIndexOf() Method āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var fruits = ["Apple", "Orange", "Apple", "Mango"];
var a = fruits.lastIndexOf("Apple");
document.getElementById("demo").innerHTML = "Apple is found in position " + (a + 1);
</script>
</body>
</html>
Output
Apple is found in position 3
javaScript āĻ āĻāĻŋāĻāĻžāĻŦā§ āĻāĻāĻāĻž āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ āĻļāĻ°ā§āĻ¤ā§āĻ° āĻāĻŋāĻ¤ā§āĻ¤āĻŋāĻ¤ā§ āĻĒā§āĻ°āĻĨāĻŽ array element āĻāĻŋ āĻŦā§āĻ° āĻāĻ°āĻŦā§āĻ¨?
JavaScript āĻ āĻāĻāĻāĻž āĻ¨āĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āĻ āĻļāĻ°ā§āĻ¤ā§āĻ° āĻāĻŋāĻ¤ā§āĻ¤āĻŋāĻ¤ā§ āĻĒā§āĻ°āĻĨāĻŽ array element āĻāĻŋ āĻŦā§āĻ° āĻāĻ°āĻ¤ā§ āĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ find() Method āĻāĻŋ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻ˛ā§āĻ¨ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers = [4, 9, 16, 25, 29];
var first = numbers.find(myFunction);
document.getElementById("demo").innerHTML = "First number over 18 is " + first;
function myFunction(value, index, array) {
return value > 18;
}
</script>
</body>
</html>
Output
First number over 18 is 25
āĻ¤āĻŦā§ find() Method āĻļā§āĻ§ā§ value return āĻāĻ°ā§āĨ¤ āĻāĻ° āĻāĻĒāĻ¨āĻŋ āĻ¯āĻĻāĻŋ index āĻĒā§āĻ¤ā§ āĻāĻžāĻ¨ , āĻ¤āĻžāĻšāĻ˛ā§ āĻāĻĒāĻ¨āĻžāĻā§ findIndex() Method āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻāĻ°āĻ¤ā§ āĻšāĻŦā§āĨ¤ āĻāĻ˛ā§āĻ¨ āĻāĻāĻāĻž āĻāĻĻāĻžāĻšāĻ°āĻŖā§ āĻĻā§āĻāĻž āĻ¯āĻžāĻ:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var numbers = [4, 9, 16, 25, 29];
var first = numbers.findIndex(myFunction);
document.getElementById("demo").innerHTML = "First number over 18 has index " + first;
function myFunction(value, index, array) {
return value > 18;
}
</script>
</body>
</html>
Output
First number over 18 has index 3