2. Write a regular expression that matches the following positive cases and does not match the following negative cases. Try to make the regular expression as general as possible. positive: 0, 10, 31, 1b, OB, 12x, 2aX, 1234567890, 11111000b, 123456789abcdefX, -0, -1b, -1bx negative: 00, 010, 31b, 1c, Od, xx, OcX, a, 2b, 3B, gX, -a, --1, 1-1

2. Write a regular expression that matches the following positive cases and does not match the following negative cases. Try to make the regular expression as general as possible. positive: 0, 10, 31, 1b, OB, 12x, 2aX, 1234567890, 11111000b, 123456789abcdefX, -0, -1b, -1bx negative: 00, 010, 31b, 1c, Od, xx, OcX, a, 2b, 3B, gX, -a, --1, 1-1

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Similar questions

A. Which statement about regular expressions is correct? a. To find all occurrences of a matching substring for a regular expression, you must add thegflag. b. By default, pattern matching using regular expressions locates all matches in the searched string. c. To find all occurrences of a matching substring for a regular expression, you must add theiflag. d. The default behavior of a regular expression is modified by adding flags to the beginning of the expression. B. After the following JavaScript statements execute, the value ofcrayonsis["pink", "blue", "green"]. let crayons = ["pink", "purple"];crayons.shift();crayons.unshift("blue", "green"); Select one: True False
Write BNF rules that matches only a string that is in the form of a capitalized title (as in a book or movie titles). Such titles may be made up of one or more words (letters only), separated by single spaces (no leading or trailing spaces). Each word must begin with a capital letter and the rest of the letters must be lowercase. For example, these are legal titles: “Jaws”, “No Country For Old Men”. On the other hand, these titles would not be legal: “ET”, “500 Days Of Summer”, “in bruge”, “Lethal weapon”. Using the “No Country For Old Men” input, show the parse tree of your grammar
Answer true or false. 1. The if…else if statement executes two different codes depending upon whether the test expression is true or false. Sometimes, a choice has to be made from more 4 possibilities. 2.it is a good practice though to use the curly braces even we have a single statement in the body
First, write code that uses cin to read in a value for numPears from input. Then, write code that uses cout to output "The store has ", the variable numPears, and " pears." End with a newline. Ex: If the input is 5, then the output is: The store has 5 pears. Ex: If the input is 7, then the output is: The store has 7 pears. #include <iostream>using namespace std; int main() { int numPears; /* Your code goes here */ return 0;}
The function derivate_leaf takes as argument an expression that is a leaf, and a variable, and returns the symbolic derivative of the leaf writh respect to the variable. (code should be in python). def derivate_leaf(e, x): """This function takes as input an expression e and a variable x, and returns the symbolic derivative of e wrt. x, as an expression.""" # YOUR CODE HERE should pass these test cases: assert derivate_leaf("x", "x") == 1 assert derivate_leaf("x", "y") == 0 assert derivate_leaf("y", "z") == 0 assert derivate_leaf(4, "x") == 0
The internet enables people to network, join a cause, take a poll, etc. Your program will prompt the user for a description of a poll to be taken and then prompt 5 users for a response of 1-10 (1 being a 'poor' response; 10 being the 'best' response).Your program does not have to validate that the user entered 1-10. We'll do that type of checking later.Your program must use a string data type to store the poll description and a Python list data type to save the integer responses of the 5 user responses.Your output should list all the responses stored in the list, the highest given response, the lowest given response and the average of the 5 responses. See sample input and utput below.Review powerpoint 3, slide 21 for an example if you need one. Sample interactive run of your program: Give a simple description of the poll to be takenRate your understanding of the first 3 zyBook chaptersEnter a 1-103Enter a 1-1010Enter a 1-104Enter a 1-102Enter a 1-105Sample outputRate your understanding…
Write a regular expression that defines strings that have an even (but nonzero) number of "a" characters followed by an odd number of "b" characters. For example, aab, aabbb, aaaab, and aaaabbb should all match the regular expression.
PS: The answer underlined in violet is incorrect.
Hi currently need help with editing this code. My professor said my code needs to have if, if-else, and if-else if statements in it. From what it looks like I'm missing if-else-if statements in my code. I need help with editing the code with if-else-if statements including any other "if or if-else" if needed in the code. I provided pictures of the code instructions and how the output and input validation needs to look. here's the code I currently have: #include <iostream>#include <string>#include <cmath>using namespace std;int main(){//variables and constantsint packageType;double dataUsed;double monthlyCharges = 0.0; // Name of the programcout << "iMobile Bill Calculator ..." << endl; // Display the pacakge options for user to pick while (true) {cout << "\nSelect a subscription :" << endl;;cout << "\t\t1. Package A" << endl;cout << "\t\t2. Package B" << endl;cout << "\t\t3. Package C" << endl;cout <<…
Please plot.? Don't reject
You are given a string ternary_expr which represents a random nested ternary expression, you need to evaluate this expression, and report the result. Assumption can be as follows: ● ternary_expr only contains digits, ‘?’, ‘:’, ’T’, ‘F’ where ’T’ is true and ‘F’ is false. ● ternary_expr contains only one-digit numbers (i.e. in the range [0, 9]) The ternary expressions group right-to-left, and the result of the expression will always evaluate to either a digit, 'T' or 'F'. Requirements 1. Way of modeling the problem with the cost implications without using Stacks.
lambda expression Show the result of the following substitution 1. (Лу. (Лх.x)х) [x — ху] 2. Лу.хуу) [xъ ди.иух]