By Malay Mandal
Solve your Ruby programming difficulties that happen in the course of your day by day scripting paintings. This publication encompasses a different collection of useful and fascinating code recipes designed to make your coding lifestyles more straightforward. Ruby Recipes includes ideas to difficulties in operating with facts, dealing with exceptions, writing blocks, and utilizing ordinary expressions.
This publication presents prepared scripts for either basic advanced scripting projects, that you may use with ease or with purely minor differences. those scripts hide parts similar to collections, sessions and buildings, useful programming, and log dealing with. With those convenient recipes at your fingertips, it is possible for you to to resolve these niggling difficulties and turn into much more efficient.
What you are going to Learn
- Install and run Ruby
- Read and write info
- Write functions
- Work with arrays, levels, hashes, and iterators
- Handle dates and time
- Process XML as text
- Master OOP options reminiscent of sessions, items, subclassing, and inheritance
- Connect to databases
Who This booklet Is For
Programmers new to Ruby, and net builders attracted to figuring out the principles of the language.
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Extra resources for Ruby Recipes: A Problem-Solution Approach
Example text
Rb 3 3 How It Works It takes in the value in the x variable and prints it (the value of x) through the puts statement. Try experimenting with a few other inputs (of different types) and see what happens. (Remember to press the Return key every time after you input). rb abc abc It seems to be handling different types very well on the outset. Note, however, that it is actually taking everything as a string. So the 3 that it printed was a String, not a Fixnum. But even that is not the full story.
Essentially, it is the same letter to be sent to multiple people, but addressing each of them separately by name. , + " " + ] is far from the ideal solution). Solution Consider the following code. " It should run as follows. rb Hello John how are you ? , using a #{
Rm_rf('credit') ■■Note There is no complaint with deleting if the directory does not exist. This is the same behavior when creating a directory. So if your program is working with the expectation that the directory should always exist prior to deletion, you may want to put checks in place to ensure that it is. mkdir). , if you omitted the require statement), FileUtils is unknown to the program—and running it would produce an error. A module is a way of grouping together methods, classes, and constants.