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Programming Articles
Page 1748 of 2547
Read file line by line using C++
This is a C++ program to read file line by line.Inputtpoint.txt is having initial content as "Tutorials point."OutputTutorials point.AlgorithmBegin Create an object newfile against the class fstream. Call open() method to open a file “tpoint.txt” to perform write operation using object newfile. If file is open then Input a string “Tutorials point" in the tpoint.txt file. Close the file object newfile using close() method. Call open() method to open a file “tpoint.txt” to perform read operation using object newfile. If file is open then Declare a ...
Read MoreHow to add text inside a Tkinter Canvas?
Canvas is undoubtedly one of the most versatile widgets in Tkinter. With Canvas, we can create shapes, texts, animate stuff, modeling 3D shapes, modeling simulations, and many more.In order to add text inside a tkinter frame, we can use the create_text() method. We can define create_text() by adding values of font, text, and other options such as create_text(x, y, font, text, options….).Example#Import the required library from tkinter import * #Create an instance of tkinter frame win= Tk() #Set the geometry win.geometry("750x280") #Create a canvas object canvas= Canvas(win, width= 1000, height= 750, bg="SpringGreen2") #Add a text in ...
Read MoreTaking input from the user in Tkinter
There might be times when we need to take the user input in our Tkinter application. We can get the user Input in a Single Line text input through the Entry widget using get() method. To display the Captured input, we can either print the message on the screen or display the input with the help of the Label widget.Example#Import the required Libraries from tkinter import * from tkinter import ttk #Create an instance of Tkinter frame win= Tk() #Set the geometry of Tkinter frame win.geometry("750x250") def display_text(): global entry string= entry.get() label.configure(text=string) ...
Read MoreHow to format strings in TypeScript?
In this tutorial, we will learn to format the strings in TypeScript. The string is the sequence of characters in any programming language, and the same goes for TypeScript. In TypeScript, strings are immutable. The meaning of the immutable is that we can’t change the string character at the particular index, but we can append the character to the string. Below, we will learn different methods to format the string in TypeScript. Using the + operator to merge two or more strings Generally, the '+' operator performs the addition operation of two or more numbers. When we use the + ...
Read MoreDifference Between High-Level Language and Low-Level Language
A language is basically a mode of communication, because it is used to share information, ideas, and opinions. In computer systems, programming languages are used by the software developers or programmers to creates applications or software systems. A programming language provides a way of writing computer instructions that are used to perform a specific task. Examples of computer programming languages include C, C++, Java, Python, Ruby, Scala, Perl, C#, Groovy, Dart, etc. Based on the closeness of a programming language to the system hardware (mainly processor), computer programming languages are classified into two categories namely, high-level languages and low-level languages. ...
Read MoreDifference between compile-time polymorphism and runtime polymorphism
Polymorphism is one of the most important OOPs concepts. Its is a concept by which we can perform single task in multiple ways. There are two types of polymorphism one is Compile-time polymorphism and another is run-time polymorphism.Method overloading is the example of compile time polymorphism and method overriding is the example of run-time polymorphism.Sr. No.KeyCompile-time polymorphismRuntime polymorphism1BasicCompile time polymorphism means binding is occuring at compile timeR un time polymorphism where at run time we came to know which method is going to invoke2Static/DynamicBindingIt can be achieved through static bindingIt can be achieved through dynamic binding4.InheritanceInheritance is not involvedInheritance is ...
Read MoreSave the plots into a PDF in matplotlib
Using plt.savefig("myImagePDF.pdf", format="pdf", bbox_inches="tight") method, we can save a figure in PDF format.StepsCreate a dictionary with Column 1 and Column 2 as the keys and Values are like i and i*i, where i is from 0 to 10, respectively.Create a data frame using pd.DataFrame(d), d created in step 1.Plot the data frame with ‘o’ and ‘rx’ style.To save the file in PDF format, use savefig() method where the image name is myImagePDF.pdf, format = ”pdf”.To show the image, use the plt.show() method.Exampleimport pandas as pd from matplotlib import pyplot as plt d = {'Column 1': [i for i in ...
Read MoreHow to hide axes and gridlines in Matplotlib?
To hide axes (X and Y) and gridlines, we can take the following steps −Create x and y points using numpy.Plot a horizontal line (y=0) for X-Axis, using the plot() method with linestyle, labels.Plot x and y points using the plot() method with linestyle, labels.To hide the grid, use plt.grid(False).To hide the axes, use plt.axis('off')To activate the labels' legend, use the legend() method.To display the figure, use the show() method.Exampleimport numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True x = np.linspace(-10, 10, 50) y = np.sin(x) plt.axhline(y=0, c="green", linestyle="dashdot", label="y=0") plt.plot(x, y, c="red", lw=5, linestyle="dashdot", label="y=sin(x)") plt.grid(False) plt.axis('off') ...
Read MoreHow to convert a Torch Tensor to PIL image?
The ToPILImage() transform converts a torch tensor to PIL image. The torchvision.transforms module provides many important transforms that can be used to perform different types of manipulations on the image data. ToPILImage() accepts torch tensors of shape [C, H, W] where C, H, and W are the number of channels, image height, and width of the corresponding PIL images, respectively.StepsWe could use the following steps to convert a torch tensor to a PIL image −Import the required libraries. In all the following examples, the required Python libraries are torch, Pillow, and torchvision. Make sure you have already installed them.import torch ...
Read MoreHow to perform string comparison in TypeScript?
In this TypeScript tutorial, users will learn to make string comparisons. The string comparison is the basic operation required while working with any programming language. Suppose we are developing a web or Android application and need to compare string data such as user id, user name, password, etc. In such cases, string comparison becomes very useful. Using the strict equality (===) operator The best way to compare the strings in TypeScript is to use the strict equality operator. The strict equality operator first checks the types of the left and right operands, and if it matches, it compares the value ...
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