ruby programming exercises

Python core programming version 2, 36th page, Chapter 2 exercisesThe answer here is not from official resources, but from my own exercises, which may be incorrect. 2.21 exercise 2-1.Variables, print, and string formatting operators. Start the interactive interpreter, assign values to some variables (string, value, etc.), and display their values by entering the variable name. Use the print statement to do t

1 primes and (5 points)Topic content:We think 2 is the first prime number, 3 is the second Prime, 5 is the third prime, and so on.Now, given the two integers n and m,0Input format:Two integers, the first representing N, and the second represents M.Output format:An integer representing the nth prime number and the number of primes between the first m primes, including the nth Prime and the first M prime.Input Sample:2 4Sample output:15Progress: Conscious use of logical expressions when using an i

identifier is used to indicate that the method will modify the receiver at an appropriate position. In this example, it converts the string to lowercase. Interval 1. The first and most likely natural use of the interval is to express the sequence. In Ruby, use the range operators "..." and "..." to create sequences. Two vertices are used to create closed intervals (including values on the right), and three vertices are used to create semi-closed

variable like a temporary array, there is a way to not define a temporary variable individually: Copy Code code as follows: (Z | | = []) Of course this is not a good programming habit, it is recommended not to use a lot of code. 8. Use a non-string or non-symbol object as a hash key Maybe you've never tried using a non-string or a symbol object as a hash key, but it's OK and sometimes useful. Copy Code code as follow

In Ruby's world, programmers enjoy all kinds of bizarre grammatical sugars, and also go through a variety of traps. And it's all about Ruby's powerful metaprogramming capabilities. Metaprogramming is like the magic of the Ruby World, and when it is white magic can help you to make the program very concise, beautiful, and when it is dark magic, you will be lost in some difficult to explain the bug. Ruby Met

Socket programming in Ruby This article mainly introduces Socket programming in Ruby. It is a basic knowledge in Ruby network programming. For more information, see Ruby provides two a

Ruby (a scripting language for object-oriented programming), a scripting language created for simple and fast object-oriented programming (object-oriented program design), was developed by the Japanese as (まつもとゆきひろ/yukihiro Matsumoto) in the 1990s. Comply with GPL protocols and Ruby License. Its inspirations and featur

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Example parsing: Use of Strategy Mode in Ruby Design Mode Programming, rubystrategy Today, your leader is eager to find you. I hope you can help him. He is in a hurry to go to the meeting. What can I do? You are curious.He told you that there is a user information table in the database of your project, which stores user data. Now you need to perform a selective query of user information. He said that it wil

Example of using Builder mode in Ruby Design Mode Programming, rubybuilder Let's first review the basic concepts of the design model:DefinitionSeparates the construction of a complex object from its representation, so that different representations can be created during the same construction process.The builder hides how the product is assembled, so if you need to change the internal representation of a pro

C # programming typing fingering exercises, I was surprised that the first study note I wrote last night had a comment, but today I am still unable to improve my basic knowledge. Let's take a look at the three books to understand the general process of program development. Today, I did not know how to wander around and found this website, which is specially used for pro