Скачать или смотреть 17.Retrieving the Key-values / keys / values from the MAP - forEach()-get()-keys()-values()

By the end of this video you will be able to :-

1. Retrieve the Values from the MAP provided key
2. Retrieve the Keys from the MAP provided value
3. Retrieve both key-value pairs
4. Iterate through the MAP

Understand
forEach , get , values and keys in the easiest way possible

in order to understand this video better watch the previous part i.e 16

   • 16.Map Methods-Deleting a Value delete()-C...  


If any doubt or query
Facebook
  / shaik.faraz  
Instagram
https://www.instagram.com/princeabdul...

The forEach() method executes a provided function once per each key/value pair in the Map object, in insertion order.

myMap.forEach(callback[, thisArg])

Parameters
Section

callback
Function to execute for each element.
thisArg
Value to use as this when executing callback.

Return value
Section

undefined.



The get() method returns a specified element from a Map object.


The keys() method returns a new Iterator object that contains the keys for each element in the Map object in insertion order.

he values() method returns a new Iterator object that contains the values for each element in the Map object in insertion order.


17.Retrieving the Key-values / keys / values from the MAP - forEach()-get()-keys()-values()