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The arrays in Python are ndarray objects. The matrix objects are strictly 2-dimensional whereas the ndarray objects can be multi-dimensional. To create arrays in Python, use the Numpy library. Matrices in Python Matrix is a special case of two-dimensional array where each data element is of strictly same size. Matrices are a key data structure for many mathematical and scientific calculations. Every matrix is also a two-dimensional array but not vice versa. Matrix objects are a subclass of ndarray, so they inherit all the attributes and methods of ndarrays. Example Create a Matrix and Display from numpy import * ... Read More
In this tutorial, we will learn to print the content of a JavaScript object. Objects are similar to variables, but they can contain many values. Javascript object values are written as key: value pairs, and each pair is separated by commas. It is used to access data from databases or any other sources. Following are the ways to print the content of JavaScript objects − Using the JSON.stringify() Method And using a for-in loop Using Object.values() Using the JSON.stringify() Method The JSON.stringify() is used to convert JavaScript Objects into a string. We have to use JSON.stringify() to send ... Read More
In this tutorial, we will learn how to preselect Dropdown using JavaScript Programmatically. A dropdown list is a toggle menu that allows the user to select one of several options. The options in this list are defined here in coding and are linked to a unique function. When you click or choose this option, that function is triggered and begins to work. A dropdown list allows us to select only one item from a list of options. To construct a basic dropdown list in HTML, the tab is combined with the, tab. Following that, JavaScript assists in performing ... Read More
We will display the contents of a text file in reverse order. For that, let us first create a text file amit.txt with the following content Display the contents of a text file in Reverse Order with Slicing Example Let us now read the contents of the above file in reverse order − # The file to be read with open("amit.txt", "r") as myfile: my_data = myfile.read() # Reversing the data by passing -1 for [start: end: step] rev_data = my_data[::-1] # Displaying the reversed data print("Reversed data = ", rev_data) Output Reversed ... Read More
In this tutorial, we will learn to load a JavaScript function using the name of a variable. Functions are the block of statements that takes an input and displays the result to the user after an execution. We can use these blocks of codes repeatedly by only declaring the function, and these functions can help a programmer in many ways as it also reduces efforts. JavaScript also supports the use of functions like other programming languages. Functions in JavaScript can be either built-in or user-defined. There are different ways to declare a function and call it. Generally, a simple Function ... Read More
Let us understand what is Del and Remove() in a Python List before moving towards the difference. Del Keyword in Python List The del keyword in Python is used to remove an element or multiple elements from a List. We can also remove all the elements i.e. delete the entire list. Example Delete an element from a Python List using the del keyword #Create a List myList = ["Toyota", "Benz", "Audi", "Bentley"] print("List = ", myList) # Delete a single element del myList[2] print("Updated List = ", myList) Output List = ['Toyota', 'Benz', 'Audi', 'Bentley'] Updated ... Read More
In this tutorial, we will learn how to get the smallest integer greater than or equal to a number in JavaScript. To get the smallest integer greater than or equal to a number, use the JavaScript Math.ceil() method. This method returns the smallest integer greater than or equal to a given number. In other words, the Math.ceil() method rounds a number and returns an integer result. Because the ceil() method is a static function of the Math object, it must be invoked via the Math placeholder object. The ceil() method produces the lowest integer value that is bigger than or ... Read More
In this article, we will implement various example to replace all occurrences of a substring with a new string. Let’s say we have the following string − Hi, How are you? How have you been? We have to replace all occurrences of substring “How “ with “Demo”. Therefore, the output should be − Hi, Demo are you? Demo have you been? Let us now see some examples − Replace All Occurrences of a Python Substring with a New String using replace() Example In this example, we will use the replace() method to replace all occurrences of a Python Substring with ... Read More
In this tutorial, we will learn how to get the largest integer that can be less than or equal to a number in JavaScript. To get the largest integer less than or equal to a number, we use the Math.floor() method in JavaScript. It is used to round off a number supplied as a parameter to its closest integer towards the downward direction of rounding, i.e., towards the less significant value. Following are two ways in which we find the largest integer that can be less than or equal to a number in JavaScript. Using Math.floor() Method The method Math.floor() ... Read More
In this tutorial, we will learn how to get the id of a form containing a dropdown list using JavaScript. The id property of an HTML element gives a unique id. The id property value must be unique inside the HTML content. The style sheet property points to a specific declaration of style. JavaScript also uses it to access and alter the element with the specified id. The id property is used to provide an element with a unique identifier. On a web page, you cannot have more than one element with the same id. A dropdown menu in a ... Read More