Code for checking Selected or Unselected state of CollectionView or TableView

basicCode.swift

// Code for checking when cell is selected for CollectionView        

let cell = collectionView.cellForItem(at: indexPath)
        
if cell?.isSelected == true{
            
    // cell is selected
 }
else{
 // cell is not selected
}

// Code for checking when cell is selected for TableView  

let cell = catListTable.cellForRow(at: indexPath)
  if cell?.isSelected == true{
            
    // cell is selected
 }
else{
 // cell is not selected
}                  



// Filter array of strings 
import Foundation 

 let arr = ["anuj","amit","tripathi"]
 let filtered = arr.filter { $0.contains("i") }
 print(filtered)  // Output :- ["amit", "tripathi"]  // if we take capital "i" then it will print empty array like []