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Server Side Programming Articles
Page 1740 of 2109
How to Read and Writes Files in Ruby
Ruby provides us with different methods that we can use to handle files. In simple terms, file handling involves different processes such as creating a new file, reading the contents present in a file, writing some content to a file, appending content to a file, deleting a file and more.There are different modes that one can use to do file handling in Ruby. These are −r = Read-only moder+ = Read-Write modew = Write-mode onlyw+ = Read-write modeAnd some more. These four mentioned modes are the most commonly used ones, when it comes to file handling in Ruby. In this article, ...
Read MoreExamples of String Functions in Ruby
In this article, we will explore some useful string functions in Ruby that are widely used to format data.Get the Length of the StringTo find the length of the string, we will use the size method.ExampleConsider the code shown below.str = "TutorialsPoint" puts str.sizeOutputIt will produce the following output.14 To Check Empty stringTo check if a string is empty, we use the size method and comparison operator.ExampleConsider the code shown below.str = "TutorialsPoint" puts str.size == 0OutputIt will produce the following output.false To Extract a Substring from StringTo extract a substring from a string, we will use square bracket notation.ExampleConsider ...
Read MoreHow Does Encapsulation Work in Ruby?
Encapsulation is the ability to wrap the data into a single unit. In simple terms, it's a mechanism to wrap data and the code that manipulates the data. In Ruby, we can achieve encapsulation with the help of classes.Let's consider a very simple example where we will implement encapsulation.Example 1Consider the code shown belowclass Document attr_accessor :name def initialize(name) @name = name end def set_name(name) @name = name end end d = Document.new('TP') d.set_name('TutorialsPoint') puts d.nameOutputIt will produce the following output −TutorialsPointExample 2Let's consider one ...
Read MoreHow to implement Data Abstraction in Ruby?
Abstraction is an object-oriented programming concept, where the essential attributes of something are shown and all the unnecessary ones are hidden. With this approach, one can hide the implementation details and provide only the important interface.A very good example of abstraction is your car. It's a great example of abstraction. When you start the car by turning the key or pressing the start button, you don't necessarily need to know how the engine works or how it gets started, also what components are present in that car or what else is there. These details that are irrelevant to the driver ...
Read MoreControl flow alterations in Ruby
In addition to loops, conditionals, and iterators, Ruby has some statements that are used to change the control flow in a program. In other words, these statements are pieces of code that execute one after the other until a condition is met.In this article, we will explore the following control flow alterations in Ruby −break statementnext statementredo statementretry statementLet's consider each of these one by one.break statementWhen a condition is True in Ruby, the break statement terminates a loop.ExampleConsider the code shown below.# break statement example itr = 1 while true if itr * 6 >= 35 ...
Read MoreHow to use the 'break' and 'next' statements in Ruby?
break Statement in RubyIn Ruby, we use the break statement in order to make sure that we exit a certain loop after a condition. For example, suppose we want to print the numbers from 1 to 10, but once we hit the number 5, we just don't want the loop to print any numbers that come after it. In such a case, we can use the break statement.Example 1Let's take an example and understand how the break statement works in Ruby. Consider the code shown below.# break statement in Ruby #!/usr/bin/ruby -w itr = 1 # while Loop ...
Read MoreArray slice function in Ruby
Sometimes we may want to exact a portion from an array data and perform some operation on it. In Ruby, we can do that with the help of the slice() function that takes two arguments, both of them indices, that are used to define a subsequence which then can be extracted from the array.SyntaxThe syntax of the slice() function is shown below −res = Array.slice(x, y)Here, x and y denote the starting index and the ending index, respectively.Example 1Now that we know a little about the slice() function on arrays, let's take a couple of examples and see how to ...
Read MoreArray shift function in Ruby
Sometimes we need to extract a portion of an array data and perform some operation on the extracted data. In Ruby, we can perform such operations with the help of the shift() function.The shift() function takes one argument, which is an index that is used to remove the first element from that index and return all the elements before it. If the index is somehow invalid, then it returns nil.SyntaxThe syntax of the shift() function is shown below −res = Array.shift(x)Here, the argument "x" denotes the starting index.Example 1Now that we know a little about the shift() function on arrays, ...
Read MoreC++ Program to get minimum difference between jigsaw puzzle pieces
Suppose we have an array A with m elements and another number n. Amal decided given a present for his n friend, so he will give each of them a jigsaw puzzle. The shop assistant told him that there are m puzzles in the shop, but they might differ in difficulty and size. Specifically, the ith jigsaw puzzle consists of A[i] pieces. So Amal decided that the difference between the numbers of pieces in his presents must be as small as possible. Let x be the number of pieces in the largest puzzle that he buys and y be the ...
Read MoreC++ Program to get blocks position after right side rotation
Suppose we have an array A with n elements. A[i] represents there are A[i] number of blocks stacked on top of each other at ith column. The entire blocks are inside a closed transparent boundary box. Now if we rotate the entire big box clockwise 90°, then due to change of gravity direction, the blocks will fall, after than reverse it to its previous orientation. Then find the new array like A after these operations.Problem CategoryThis problem falls under sorting problems. Sorting is a very common problem while we are talking about different problem solving algorithms in computer science. As ...
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