In this article, we will see how to push array elements in the node js example. Also, learn how to push objects in an array in node.js. The push() method adds new items to the end of an array. The push() method changes the length of the array. The push() method returns the new length.
So, let's see node js array push key value, and how to push element in the array in javascript.
Example 1: push() function
push() is an array function from node.js that is used to add element to the end of an array.
Syntax:
array_name.push(element)
push_array = [2, 4, 6, 8, 10, 12];
push_array.push(14);
console.log(push_array);
Output:
[ 2, 4, 6, 8, 10, 12, 14 ]
Read Also: Laravel 8 Eloquent whereHas Condition
Example 2 : Key and Value
Now, we will see key and value push in an array object.
key_val_arr = [
{id: 1, name: "dell" },
{id: 2, name: "apple" },
{id: 3, name: "hp" }
];
key_val_arr.push({id: 4, name: "acer"});
console.log(key_val_arr);
Output :
[
{ id: 1, name: 'dell' },
{ id: 2, name: 'apple' },
{ id: 3, name: 'hp' },
{ id: 4, name: 'acer' }
]
Example 3: unshift() function
In this example, we will add key and value in the first position of the array object using unshift() function.
key_val_arr = [
{ id: 1, name: "dell" },
{ id: 2, name: "apple" },
{ id: 3, name: "hp" }
];
key_val_arr.unshift({id: 4, name: "acer"});
console.log(key_val_arr);
Output :
[
{ id: 4, name: 'acer' },
{ id: 1, name: 'dell' },
{ id: 2, name: 'apple' },
{ id: 3, name: 'hp' }
]
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