what does .push do in javascript code example

Example 1: javascript pushing to an array

some_array = ["John", "Sally"];
some_array.push("Mike");

console.log(some_array); //output will be =>
["John", "Sally", "Mike"]

Example 2: javascript array push

var SomeRandomArray = [];
SomeRandomArray.push("Hello, world!");

Example 3: how to append object in array javascript

var select =[2,5,8];
var filerdata=[];
for (var i = 0; i < select.length; i++) {
  filerdata.push(this.state.data.find((record) => record.id == select[i]));
}
//I have a data which is object,
//find method return me the filter data which are objects
//now with the push method I can make array of objects

Example 4: javascript array push

// JS array .push() method

let items_in_backpack = ['food', 'water', 'flashlight', 'GPS']; // Our starting array
items_in_backpack.push('javascript array push knowledge'); // Adds the <<< string to the array items_in_backpack


// Now the array is:
// ['food', 'water', 'flashlight', 'GPS', 'javascript array push knowledge']

Example 5: js push

let arr = [9, 4, 3, 18]
arr.push(30)
console.log(arr) // [9, 4, 3, 18, 30]