Part: 2 JavaScript Array Methods | JavaScript Complete Course for Beginners
Part: 2 JavaScript Array Methods | JavaScript Complete Course for Beginners
Array is a special type of variable in which we can store more than values and we access to single value using it's index number.
In this video we'll talk about array properties and methods. There are a lot of methods of array by which we can perform different types of operations on array.
Some of the array methods are below:
1. toString:-
Merge all values array and return as a string. separate values from each other by comma.
2. join:-
Merge all values array and return as a string. You can mention here your custom separator.
3. indexOf:-
Search some element in array and return it's index number.
4. slice:-
Extract some part of array.
5. splice:-
Remove or/and add some elements from/to array. It will change the original array.
6. push:-
Add new element to end of array. It will change the original array.
7. pop:-
remove last element from array. It will change the original array.
8. unshift:-
add new element to start of the array. It will change the original array.
9. shift:-
remove the first element of the array.
Array Iterations methods
1. forEach:-
it takes a callback which will run for every element of array.
2. map:-
it takes a callback which will run for every element of array and return a new array.
3. filter:-
it takes a callback which will run for every element of array and in every iteration it return a boolean value if the value is true is add the iterating element to new array but if the value if false it will not add the iterating element to the new array.
4. every:-
it will take a callback and compare every element of array with the specified condition. if all the elements are matched it return true but if one or more than one elements are not matched it return false. it works like AND operator.
5. some:-
it will take a callback and compare every element of array with the specified condition. if one or more than one elements are matched it return true but if all the elements are not matched it return false. it works like OR operator.
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