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const prices = [400.50, 3000, 99.99, 35.99, 12.00, 9500];


// Sorting books by their rating: // use slice to copy the array
const acscendingsOrders = prices.slice().sort((a, b) => a.toFixed(2) - b.toFixed(2))
const descendingOrders = prices.slice().sort((a, b) => b.toFixed(2) - a.toFixed(2))

#function #return #values #filtering

indexOf explantion

/** The indexOf() method
	Returns the position of the first occurrence of a value in a string.
	The indexOf() method returns -1 if the value is not found.
	The indexOf() method is case sensitive.
  */


function isValidPassword(password, username) {
	if (
		password.length < 8 ||
		password.indexOf(' ') !== -1 ||
		password.indexOf(username) !== -1
	) {
		return false;
	}
	return true;
}

/** or */


function isValidPassword(password, username) {
	const tooShort = password.length < 8;
	const hasSpace = password.indexOf(' ') !== -1;
	const tooSimilar = password.indexOf(username) !== -1;
	if (tooShort || hasSpace || tooSimilar) return false;
	return true;
}

#function #return #values #filtering

return values from functions

function betweenYears(yearStart, yearEnd){
    return function(number){
          if(number >= yearStart && number <= yearEnd){
              return number
          }
          return false
    }
}

const myYear = betweenYears(1900, 1999);
myYear(1978);

#return #true #substring #elipses

substring text with elipses

export function getDescription(text) {
    if(text.length > 10){
        return text.substring(0, 10) + "..."
    }
    return text
}

#ios #swift #closure #return

Closure that returns String

// calling 
    getProfileMode { (mode) in
            print("Mode : ", mode)
        }

func getProfileMode(completion: @escaping (String) -> Void) {
           // write firestore code here
            completion("true")
        }

#ios #swift #return #completion

return url from completion

    override func viewDidLoad() {
        // function calling
        querySomething { (completed) in
              print("completed :", completed)
        }
    }
    
    func querySomething(completion: @escaping (Bool) -> Void) {
        let db = Firestore.firestore()
        db.collection("collectionName").document().addSnapshotListener { (documentSnapshot, error) in
            if error != nil {
                completion(false)
                return
            }
            completion(true)
        }
    }

#python #python #function #bytesize #return

How to find byte size?

def byte_size(string):

  return(len(string.encode('utf-8')))

byte_size('😀’) # 4
byte_size('Hello World') # 11

#python #python #function #return

How to use of “return” keyword in a function?

#define a function 
 Def cube(num)
      #write the formula of cube
      return num*num*num
     #give the number to calculate the cube 
     cube(3)
   # print the cube of that number simply by using print command
    print(cube(3))
     “return” keyword means that function have to return          value

#python #python #function #return #allunique

All unique

#define function
defall_unique(lst):

   return len(lst) == len(set(lst))
   
x = [1,1,2,2,3,2,3,4,5,6]


y = [1,2,3,4,5]


all_unique(x) # False
all_unique(y) # True

sorting basic

indexOf explantion

return values from functions

substring text with elipses

Closure that returns String

return url from completion

How to find byte size?

How to use of “return” keyword in a function?

All unique

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