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Programming Articles
Page 2225 of 2547
Difference between console.log and process.stdout.write in NodeJS
Both the methods – console.log and process.stdout.write have a basic definition to write or print the statements on the console. But, there is a slight difference in the way they execute these tasks. Internally, console.log implements process.stdout.write which itself is a buffer stream that will be used to directly print statements on your console.process.stdout.writeconsole.logIt continuously prints information as retrieved from the stream without adding any new line.It first prints the information being retrieved and then adds a new line. Then it will go to retrieve the second set of statements to print.The process.stdout.write method takes only string as paramter. Other ...
Read MoreCreating a MySQL Table in NodeJS using Sequelize
Introduction to SequelizeSequealize follows the promise-based Node.js ORM for different servers like – Postgres, MySQL, MariaDB, SQLite, and Microsoft SQL Server.Following are some of the main features of NodeJS sequelize −Transaction SupportRelationsEager and Lazy LoadingRead Replication and more...Connecting to MySQL using SequelizeWe need to establish a connection between MySQL and Node.js using Sequelize.After creating a successful connection with sequelize, we would require the following three files for configuration. Please carefully create the following files in their respective folders only.SequelizeDemo > application.jsThis will be our root file which will hold the actual logic.SequelizeDemo>utils>database.jsThis will hold all the connection details to MySQL.SequelizeDemo>models>user.jsThis ...
Read MoreAsync Copy in fs-extra - NodeJS
Introduction to Async copyThis method copies files or directories from one location to another location. The directory can have sub-directories and files.Syntaxcopy(src, dest[, options][, callback])Parameterssrc – This is a string paramter which will hold the source location of the file or directory that needs to be copies. If the location is a directory, it will copy everything inside of the directory instead of whole directory.dest – This will hold the destination location where the files/directories will be copies. If src is a files, dest cannot be a directory.options −overwrite – If set to true, existing files or directories will be ...
Read MoreDifference Between PLA and PAL
In this post, we will understand the difference between PLA and PAL −PLAIt stands for Programmable Logic Array.Its speed is lesser in comparison to PAL.It is highly complex.It is expensive.It is not available easily.It is used less in comparison to PAL.PALIt stands for Programmable Array Logic.It has a higher speed in comparison to PLA.It is less complex.It is inexpensive.It is more readily available in comparison to PLA.It is used more in comparison to PLA.
Read MoreWhat does 'weight' do in tkinter?
In order to structure the layout of the widgets in an application, we generally use the tkinter grid system. A grid system comprises rows and columns in which widgets are aligned. If we want to configure any widgets, then we can use the grid row and columns properties.Consider, if a widget is aligned such that there is extra space left, then we can add the weight property which enables the column to grow. A non-zero weight enables the column width to grow in the screen size if there is any extra space left. However, if the weight is zero, then ...
Read MoreUnderline Text in Tkinter Label widget
Tkinter label widgets can be styled using the predefined attributes and functions in the library. Labels are useful in place of adding text and displaying images in the application. Sometimes, we need to style the font property of Label Text such as fontfamily, font-style (Bold, strike, underline, etc.), font-size, and many more. If we want to make the label text underlined, then we can use the underline property in the font attribute.Example#Import the required library from tkinter import* #Create an instance of tkinter frame win= Tk() #Define geometry of the window win.geometry("750x250") #Create a Label widget label= Label(win, text= "Hey, ...
Read MoreSelect all text in a Text widget using Python 3 with tkinter
Tkinter text widgets are used for creating text fields that contain multiline user input. It has many inbuilt functions and methods which can be invoked to perform certain operations on text widgets. In contrast, let us assume that we have written a bunch of context in the text widget and if we want to select all the text, then we can use tag_add(tag, range) to select the text and add tag and tag_configure(tag, options) to style the tag property.Example#Import tkinter library from tkinter import * #Create an instance of tkinter frame win = Tk() #Set the geometry win.geometry("750x200") def select_text(): ...
Read MoreResizing pictures in PIL in Tkinter
Python provides Pillow or PIL package for image processing which is used to load, process, and customize the images in an application. It has many properties like Color of the image, Image Font, resizing the images, loading the image, etc.In order to resize the Images in an application, we can use the resize(width, height) method. The method can be invoked after loading the image in the application. In order to open the image in the application, we have to import the package in the notebook as, from PIL import Image, ImageTkExampleIn the following example, we have resized an image to ...
Read MoreRemoving minimize/maximize buttons in Tkinter
When we run our tkinter application, it initially displays a window that has an interface to display all the widgets. Eventually, we can remove the maximizing and minimizing property of the displayed window by using the resizable(boolean) method. It takes two Boolean values that refer to the status of width and height of the window. We generally disable the max and min resizing property by assigning zero to both values of width and height.Example#Import the required library from tkinter import* #Create an instance of tkinter frame win= Tk() #Set the geometry win.geometry("750x250") #Disable the resizable Property win.resizable(False, False) #Create an ...
Read MoreNotebook widget in Tkinter
Notebook widget is an inbuilt widget of ttk library in tkinter. It enables the user to create Tabs in the window application. Tabs are generally used to separate the workspace and specialize the group of operations in applications at the same time.ExampleIn this example, we will create two tabs using Notebook widget and then will add some context to it.#Import the required library from tkinter import * from tkinter import ttk #Create an instance of tkinter frame win = Tk() win.geometry("750x250") #Create a Notebook widget my_notebook= ttk.Notebook(win) my_notebook.pack(expand=1, fill=BOTH) #Create Tabs tab1= ttk.Frame(my_notebook) my_notebook.add(tab1, text= "Tab 1") tab2= ttk.Frame(my_notebook) my_notebook.add(tab2, ...
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