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Articles by Mukul Latiyan
Page 24 of 37
Transpose() function in Ruby Programming
The transpose function in Ruby is mainly used to return the transpose of an array or a matrix.Syntaxarray.transposeOrMatrix.transposeLet's take a couple of examples of the transpose function on array first and then on matrices.Example 1Consider the code shown below# transpose() in array # array declaration first_arr = [[18, 22], [33, 3], [8, 6]] # array declaration second_arr = [[1, 3, 2, 5, 88, 9]] # print statements puts "transpose() output : #{first_arr.transpose()}" puts "transpose() output : #{second_arr.transpose()}"Outputtranspose() output : [[18, 33, 8], [22, 3, 6]] transpose() output : [[1], [3], [2], [5], [88], [9]]Example 2# transpose() in ...
Read MoreArray push(), pop() and clear() functions in Ruby
The most widely used functions in Ruby when it comes to arrays are push(), pop(), and clear() functions. These functions are used when we want to enter, take out and clear the array data, respectively. In this article, we will learn about all these functions one by one.push() FunctionThe push function in Ruby is used to push elements at the end of an array. The function can accept single as well as multiple objects as arguments.Consider the code shown below as reference of the push() function.Example 1# push() function example in Ruby # few arrays first_arr = ["Letters", "a", ...
Read MoreString reverse vs reverse! function in Ruby
In Ruby, we have two functions available to us in case we want to reverse the contents of a string. These two functions are reverse and reverse!. While both of them are used to reverse the string, the only difference between them is that the reverse function reverses the string and then generates a new string, whereas the reverse! function reverses a string in place.reverse FunctionThe syntax of the reverse function is shown belownew_str = str.reverseNow, let's first look at an example of the reverse function in Ruby.Consider the code shown below.Example 1# the reverse method in Ruby str ...
Read MoreHow to push and pop elements in a queue in Ruby?
In this article, we will learn how to push (insert) and pop (remove) elements in a queue in Ruby.In Ruby, we can insert elements into a queue with the help of the push function. The syntax of the push function is shown below.queueName.push(element)Notice that the above syntax accepts one argument, which is the element that you want to insert into the queue. The result of the above command is that a new element will be added into the front of the queue.To remove an element from the queue, we can make use of the pop function. The syntax of the ...
Read MoreHash select() and select!() methods in Ruby
In Ruby, we make use of the select() method when we want to find the array from the hash based on the condition and we make use of the select!() method when we want to check whether the array from the hash is present or not.Let's explore a few examples of the hash select() method to understand it better.Example 1# Hash.select() method # Hash value first = { "first" => 150, "second" => 200 } # Hash value second = {"first" => 150} # Hash value third = {"first" => 150, "third" => 300, "second" => 200} ...
Read MoreHow to use global variables in Ruby?
Global variables have a global scope and they can be accessed from anywhere in a program. Assignments to global variables can be made from anywhere in the program. Global variables are always prefixed with a dollar sign.It is necessary to define a global variable to have a variable that is available across classes. When a global variable is uninitialized, it has no value by default and its use is nil.Now let's make use of the global variable in an example to understand it better. Consider the code shown below.Example 1# Global Variable example # global variable $global_var = 15 ...
Read MoreYield keyword in Ruby Programming
There are often cases where we would want to execute a normal expression multiple times inside a method but without having to repeat the same expression again and again. With the yield keyword, we can do the same.We can also pass arguments to the yield keyword and get values in return as well. Now let's explore some examples to see how the yield keyword works in Ruby.Example 1Consider the code shown below where we are declaring a normal yield keyword twice inside a method and then calling it.def tuts puts "In the tuts method" # using yield keyword ...
Read MoreTrue, False and Nil in Ruby Programming
We know that everything in Ruby is treated as an object, and so the true, false and nil as well. They are built-in types that Ruby provides to do different conditional checks and more. In this article, we will explore different examples of the true, false and nil data types and how to use them.True, False in RubyLet's start with a very simple example where we will check if two variables are equal or not.Example 1Consider the code shown belowfirst = 10 second = 10 if first == second # If Condition is true puts "True! First ...
Read MoreStatic Members in Ruby Programming
Static Members in Ruby are declared with the help of the class. Since Ruby doesn't provide a reserved keyword such as static, when we make use of the class variable, then we create a static variable and then we can declare a method of that class in which the static variable is defined as a static method as well.In Ruby, there are two implementations for the static keyword −Static variableStatic methodIn this article, we will explore both these implementations where first, we will explore a code example of how to declare a static variable and then we will see how ...
Read MoreVariable number of arguments in Lua Programming
There are functions in Lua that accept a variable number of arguments. These are very helpful in cases where we want to run the same function with many different arguments that might vary in length. So, instead of creating a different function, we pass them in a variable arguments fashion.Syntaxfunction add(...) -- function code endIt should be noted that the three dots (...) in the parameter list indicate that the function has a variable number of arguments. Whenever this function will be called, all its arguments will be collected in a single table, which the function addresses ...
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