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Javascript Add delete items from begin, end of Arrays example


Javascript Arrays

The array is used to store a collection of objects in insertion ordered Array Supports Queue and stack operations, It has methods in which we can add an element to the start/end of an array. delete an element from the start and end of an array

How to add an object to the end of an array?

The array has a push method that inserts an object to the end of the array

Syntax

push(item0 : Object, [item1 : Object, [...]]) : Number  

parameters are an object and return the object count Here is an example push() method usage

let strs = ["one", "two"];  
strs.push("three");  
console.log( strs ); // one, two, three  

How to remove an object from the end of an array?

javascript array has the pop() method, Which removes an element from the end of the Array.
Here is an example pop() method usage

let strs = ["one", "two","three"];  
strs.pop();  
console.log( strs ); // one, two  

How to remove an element to starting of an array in javascript?

shift() method in an array removes the elements from the start of the array and returns the first element from the array string.

Here is an example shift() method usage

let strs = ["one", "two","three"];  
console.log( strs.shift() ); // one  
console.log( strs ); // two three  

How to add an element to the beginning of an array in javascript?

unshift() method in array add the object to the start of the array and returns the size of the newly modified array.
Here is an example unshift() method usage

let strs = ["one", "two","three"];  
console.log( strs.unshift('start') ); // 4  
console.log( strs ); // start one two three  

Conclusion

We learned how to add and remove an object in an array from start and end position

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