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JavaScript Array Methods
Converting Arrays to Strings
The JavaScript method toString() converts an array to a
string of (comma separated) array values.
Example
const fruits =
["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits.toString();
Result:
The join() method also joins all array elements into a
string.
It behaves just like toString(), but in addition you can
specify the separator:
Example
const fruits =
["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits.join(" * ");
Result:
Popping and Pushing
When you work with arrays, it is easy to remove elements and add new elements.
This is what popping and pushing is:
Popping items out of an array, or pushing items into an array.
Popping
The pop() method removes the last element from an array:
Example
const fruits =
["Banana", "Orange", "Apple", "Mango"];
fruits.pop(); // Removes "Mango" from fruits
The pop() method returns the value that was "popped out":
Example
const fruits =
["Banana", "Orange", "Apple", "Mango"];
let x =
fruits.pop(); // x = "Mango"
Pushing
The push() method adds a new element to an array (at the
end):
Example
const fruits =
["Banana", "Orange", "Apple", "Mango"];
fruits.push("Kiwi"); // Adds "Kiwi" to fruits