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ProblemWe are required to write a JavaScript function that takes in an array of positive integers, arr, as the first and the only argument.Our function should sort the input array in such a way that the number that have the highest digit sum comes first followed by the numbers with lesser digit sums.For example, if the input to the function is −Inputconst arr = [5, 34, 1, 13, 76, 8, 78, 101, 57, 565];Outputconst output = [565, 78, 76, 57, 8, 34, 5, 13, 101, 1];Output ExplanationBecause 565 have the highest digit sum of 16, followed by 78 and 76 ... Read More
ProblemWe are required to write a JavaScript function that takes in a string of mathematical expressions, str, as the first and the only argument.The task of our function is to remove parentheses from the expression keeping the operations and operands in place.For example, if the input to the function is −Inputconst str = 'u-(v-w-(x+y))-z';Outputconst output = 'u-v+w+x+y-z';ExampleFollowing is the code − Live Democonst str = 'u-(v-w-(x+y))-z'; const removeParentheses = (str = '') => { let stack = [] let lastSign = '+' for (let char of str) { if (char === '(' ... Read More
ProblemWe are required to write a JavaScript function that takes in a number, num, as the first and the only argument.Our function should return the number of special steps needed to obtain a palindrome. The special step is: "reverse the digits, and add to the original number". If the resulting number is not a palindrome, repeat the procedure with the sum until the resulting number is a palindrome.For example, if the input to the function is −Inputconst num = 87;Outputconst output = 4;Output ExplanationBecause the steps involved are −87 + 78 = 165; 165 + 561 = 726; 726 + ... Read More
ProblemWe are required to write a JavaScript function that takes in a camelCase string, str as the first and the only argument.Our function should construct and return a new string that splits the input string using a space between words.For example, if the input to the function is −Inputconst str = 'thisIsACamelCasedString';Outputconst output = 'this Is A Camel Cased String';ExampleFollowing is the code − Live Democonst str = 'thisIsACamelCasedString'; const breakCamelCase = (str = '') => { const isUpper = (char = '') => char.toLowerCase() !== char.toUpperCase() && char === char.toUpperCase(); let res = ''; const { length: ... Read More
ProblemWe are required to write a JavaScript function that takes in an array of single characters, arr, as the first and the only argument.The array can contain of only 4 characters, they are −‘N’ → stands for North direction‘S’ → stands for South direction‘W’ → stands for West direction‘E’ → stands for East directionEach character specifies a move of unit distance in that particular direction. And if anywhere in the array, two opposite directions, [(‘S’ and ‘N’) or (‘E’ and ‘W’)] appear adjacently, they cancel out the movement of each other. Therefore, our function is supposed to find the resulting ... Read More
In order to work with a tkinter application, we have to install and import the tkinter library in our environment. Generally, we import the tkinter library in the environment by using from tkinter import * command.The significance of "import *" represents all the functions and built-in modules in the tkinter library. By importing all the functions and methods, we can use the inbuilt functions or methods in a particular application without importing them implicitly.There are lots of widgets, functions, methods available in tkinter library which can be used to construct the component of a particular application. Tkinter provides the ttk ... Read More
Tkinter is a Python package which comes with many functions and methods that can be used to create an application. In order to create a tkinter application, we generally create an instance of tkinter frame, i.e., Tk(). It helps to display the root window and manages all the other components of the tkinter application. We can initialize the tkinter instance by assigning the variable to it.ExampleIn the following example, we will create an instance of tkinter frame and create a label widget.#Import tkinter library from tkinter import * #Create an instance of tkinter frame or window win= Tk() #Set the ... Read More
Tkinter variable (var) is defined for a particular widget (textvariable=var) to store the updated value of a widget. Sometimes, there might be a case, while updating the variable information, we need to process some extra operations such as read, write, or undefined.Tkinter provides a way to update the variable with a callback function trace (self, mode, callback) which takes the operation of the process such as read(r), write(w), or undefined(u). On the basis of these values, the callback decides what the process needs to do in the callback function. The other two values define the variable which needs to be ... Read More
Tkinter is a Python library used for creating and developing GUI-based applications. It is completely open-source which works on Windows, Mac, Linux, and Ubuntu. In Windows operating system, we can install the Tkinter library using the command pip install tkinter. It will install all the other modules that come with Tkinter library. Tkinter can be installed on Jupyter notebook as well, by using the command pip install tkinter. We can run all the standard commands of Tkinter in Jupyter notebook.Once we have installed Tkinter in Jupyter notebook, then we can verify the installation by typing the following command −from tkinter ... Read More
Tkinter Spinbox is used to add the increment and decrement buttons to the Entry widget, making it useful to handle the numerical data of any application. A spinbox widget can be created using the Spinbox(arguments). We can set the default value for the spinbox widget by defining the Value using StringVar() object. The default value plays a vital role for any widget, as it helps you to define the bounded value.Example#Import Tkinter library from tkinter import * from tkinter import ttk #Create an instance of Tkinter frame or window win= Tk() #Set the geometry of tkinter frame win.geometry("750x250") #Set the ... Read More