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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to create a black image and a white image using OpenCV Python?
To create a black image, we could use the np.zeros() method. It creates a numpy n-dimensional array of given size with all elements as 0. As all elements are zero, when we display it using cv2.imshow() or plt.imshow() functions, it displays a balck image. To create a white image, we could use the np.ones() method. It creates a numpy n-dimensional array of given size with all elements as 1. We multiply this array by 255 to create a white image. Now all elements are 255, so when we display it using cv2.imshow() or plt.imshow() functions it gives a white image. ...
Read MoreHow to join two images horizontally and vertically using OpenCV Python?
Images in OpenCV are represented as numpy.ndarray. OpenCV provides two functions − cv2.hconcat() and cv2.vconcat() to join images. The function cv2.hconcat() joins images horizontally and the function cv2.vconcat() joins images vertically. These functions join two or more images. These functions accept a list of images of the same size to join them. The height, width and number of channels of all images must be the same to join them Syntax cv2.hconcat(img_list) cv2.vconcat(img_list) Where img_list is a list of images [img1, img2, …]. To join the images horizontally or vertically, one could follow the steps given below − ...
Read MoreHow do we use equivalence (“equality”) operator in Python classes?
Using comparison operators, we may compare various data types in Python. When creating custom classes, we are unable to simply compare them using the comparison operators. This article will go over various approaches to verify equivalence ("equality") in Python classes. Equality of class objects The == operator makes it simple to determine whether two built-in objects, such as strings or integers, are equal. This is demonstrated in the example below. Example Following is an example of == operator − char1 = 365 char2 = 83 result = char1 == char2 print("{} and {} are equivalent to each other:{}".format(char1, char2, result)) ...
Read MoreFunction to compute factorial of a number in JavaScript
In this article, the given task is to get the factorial of a number in JavaScript. What is the factorial of a number? The multiplication of all positive integers smaller than or equal to n gives the factorial of a non-negative integer. For example, assume the non-negative integer is 4 and the factorial of 4 will be 4*3*2*1 which is equal to 24. The symbol of factorial is represented by "!". so it will be (4!). The value of 0! Will be 1 as 0 is not a positive integer. The mathematical formula of factorial ("n!") This is ...
Read MoreHow to connect your YouTube mobile App to TV?
Whether one wants to watch a favourite TV series or videos, YouTube offers a variety of entertaining content to his audiences. Viewers can enjoy watching YouTube on devices like computers, tablets, and mobile phones but all these devices have a very limited screen size making this online streaming less interesting. So, why settle for small-screen devices when we can watch YouTube videos on the big TV screen with the use of technology? With the new inventions that happen day-to-day in technology, users can now enjoy an optimal YouTube viewing experience by casting YouTube to TV. Casting on TV makes ...
Read MoreConverting two arrays into a JSON object in JavaScript
Given two arrays and the task is to convert those two arrays into a JSON object. Where the first array elements are keys of the object and the second array elements are values of the object. Input-Output Scenario Let’s look into the scenario of how two arrays will be converted into a JSON object. Consider two arrays are having some elements. Now, we need to convert these two arrays into a JSON object. Array1 = [1, 2, 3, 4]; Array2 = ['A', 'B', 'C', 'D']; Output = {"1":"A", "2":"B", "3":"C", "4":"D"} //JSON object In this article, ...
Read MoreRemoving property from a JSON object in JavaScript
A JSON (JavaScript object notation) Object is always surrounded by the curly braces {}. The values must be a valid JSON data type, and the keys must be strings. JSON supports the following data types: number, string, object, Boolean, array, and null. There has to be a colon (":") separating the keys and values. A comma separates each key and value pair. Following is the syntax of JSON Object − JSONObject = {} Following is the basic declaration of JSON Object in JavaScript − JSONObject = { "name" : "Suriya", ...
Read MoreFinding product of Number digits in JavaScript
We are required to write a JavaScript program that takes in a number and finds the product of all of its digits. Input output scenarios Assume there is a number digit assigned to a variable and task is to find the product of the number. Input = 12345; Output = 120 Let’s look into another scenario, where we convert the string number digit into int value and multiply them. Input = "12345"; Output = 120 Math.floor() Math.floor() function in JavaScript returns the largest integer which is less than equal to a given number. In simple ...
Read MoreFinding the mid of an array in JavaScript
An Array in JavaScript is datatype which is used to store homogeneous elements. These elements are stored at contiguous memory locations. We can access each data element in the array with the help of index numbers. The index numbers will start from 0. Syntax Following is the syntax of creating a JavaScript array − const array_name = [item1, item2, ...]; The following is the simple declaration of array in JavaScript. Const Body = ['Eyes', 'Nose', 'Lips', 'Ears']; Finding the mid element of an array We are required to write a JavaScript program that finds the middlemost ...
Read MoreReturn the sum of two consecutive elements from the original array in JavaScript
An Array is known as collection of similar data elements which are stored at contiguous memory locations. Array is such a simple data structure where we can access each data element in the array with the help index numbers, which starts from 0. The following is the basic declaration of array in JavaScript − const mobiles = ["SAMSUNG", "ONEPLUS", "APPLE"]; Sum of two consecutive elements of an array We are required to write a JavaScript function that takes in an array of Numbers and returns a new array with elements as sum of two consecutive elements from ...
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