For all WWPD questions, type Function if you believe the answer is , Error if it errors, and Nothing if nothing is displayed. As a reminder, the following two lines of code will not display anything in the Python interpreter when executed: > x = None >>> X >>> lambda x: x # A lambda expression with one parameter x >>> a = lambda x: x # Assigning the lambda function to the name a >>> a (5) >>> (lambda: 3) () # Using a lambda expression as an operator in a call exp. >>> b= lambda x: lambda: x # Lambdas can return other lambdas! >>> c= b (88) >>> C >>> c() >>> d= Lambda f: f(4) # They can have functions as arguments as well. >>> def square(x): return x*X >>> d (square) >>> Z = 3 >>> e = Lambda x: Lambda y: Lambda: x + y + z >>> e(0) (1) () >>> f = Lambda z: x + Z >>> f(3) >>> higher_order_lambda = Lambda f: Lambda x: f(x) >>> g = Lambda x: x* x >>> higher_order_lambda (2) (g) # Which argument belongs to which function call? >>> higher_order_lambda (g)(2) >>> call_thrice = lambda f: lambda x: f(f(f(x))) >>> call_thrice (Lambda y: y + 1) (0) >>> print_lambda = lambda z: print (z) # When is the return expression of a lambda expression executed? >>> print_lambda >>> one thousand= print_lambda (1000)

For all WWPD questions, type Function if you believe the answer is , Error if it errors, and Nothing if nothing is displayed. As a reminder, the following two lines of code will not display anything in the Python interpreter when executed: > x = None >>> X >>> lambda x: x # A lambda expression with one parameter x >>> a = lambda x: x # Assigning the lambda function to the name a >>> a (5) >>> (lambda: 3) () # Using a lambda expression as an operator in a call exp. >>> b= lambda x: lambda: x # Lambdas can return other lambdas! >>> c= b (88) >>> C >>> c() >>> d= Lambda f: f(4) # They can have functions as arguments as well. >>> def square(x): return xX >>> d (square) >>> Z = 3 >>> e = Lambda x: Lambda y: Lambda: x + y + z >>> e(0) (1) () >>> f = Lambda z: x + Z >>> f(3) >>> higher_order_lambda = Lambda f: Lambda x: f(x) >>> g = Lambda x: x x >>> higher_order_lambda (2) (g) # Which argument belongs to which function call? >>> higher_order_lambda (g)(2) >>> call_thrice = lambda f: lambda x: f(f(f(x))) >>> call_thrice (Lambda y: y + 1) (0) >>> print_lambda = lambda z: print (z) # When is the return expression of a lambda expression executed? >>> print_lambda >>> one thousand= print_lambda (1000)

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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