How To Use Jupyter Notebook

print("Hello World") To run a cell either click the run button or press shift ⇧ + enter ⏎ after selecting the cell you want to execute. After writing the above code in the jupyter notebook, the output was: Note: When a cell has executed the label on the left i.e. ln [] changes to ln [1]. If the cell is still under execution the label

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How to Convert Int to Bytes in Python

length – desired length of the array in bytes . byteorder – order of the array to carry out conversion of an int to bytes. byteorder can have values as either “little” where most significant bit is stored at the end and least at the beginning, or big, where MSB is …

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How to use onKeyPress event in ReactJS

Step 1: Create a React application using the following command: Step 2: After creating your project folder i.e. functiondemo, move to it using the following command: Project Structure: It will look like the following. Example: In this example, we are going to build an application that displays the key pressed in the input box.

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How to place two input box next to each other using

HTML supports various type of inputs like text, password, Date-Time, date, time, week, number, email, and a lot more. There are various conditions where we have to take multiple inputs in a single line or next to each other and this can be achieved by .input-group and inline element. The inline element does not take the entire line rather takes

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Introduction to Power Analysis in Python

To understand what power analysis is, we must first take a look at the concepts of a statistical hypothesis test. A statistical hypothesis test calculates some quantity under a given assumption (null hypothesis) and the result of the test allows us to interpret whether the assumption is valid or whether the assumption has been violated. A violation of the test’s assumption is often called

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View Serializability in DBMS

Methods to check View-Serializability of a schedule –. Method-1 : Two schedules S1 and S2 are said to be view-equivalent if the following conditions are agreed – Go to Link : Point number 3 . Method-2 : First of all, check whether the given schedule is …

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SQL Query to Find All Employees Who Are Also Managers

To verify the contents of the table use the below statement: SELECT * FROM EMPLOYEES; Now to get the details of all the employees who are also managers, we make use of the EMPLOYEE_ID field and the MANAGER_ID, and we will find out the details of employees who are also managers. The query would have the following syntax:

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Write a dictionary to a file in Python

Dictionary is used to store data values in the form of key:value pairs. In this article we will see how to write dictionary into a file. Actually we can only write a string to a file. If we want to write a dictionary object, we either need to convert it into string using json or serialize it.

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chown command in Linux with Examples

Examples: To Change group ownership In our case I am using group1 as a group in the system. To change ownership we will use. chown :group1 file1.txt. You can see that the group permissions changed to group1 from root, if you use -v option it will report that. We just need to add a “:” to change group.

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How to import a class from another file in Python

In this article, we will see How to import a class from another file in Python. Import in Python is analogous to #include header_file in C/C++. Python modules can get access to code from another module by importing the file/function using import. The import statement is that the commonest way of invoking the import machinery, but it’s not the

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How to Rotate Image in HTML

How to Rotate Image in HTML ? You can easily rotate images in HTML using the CSS transform property. This property is used to move, rotate, scale, and perform various kinds of transformations of elements. Approach: You can use rotate () function defined as a transformation that rotates an element around a fixed point on the 2D plane, without

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Change the Default DNS Server of Your Router and Windows

Step 4: In the next step click on Properties, and click the button beside ‘ Use the following DNS server addresses ’. Step 5: Enter both numerical sequences for either Cloudflare or Google in the ‘ Preferred DNS server ’ and ‘ Alternate DNS server boxes, then click OK. You are done. You have successfully changed the default DNS server

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How to set default value in select using ReactJS

In HTML, the ‘selected’ attribute in the option tag is used to set the default value in the select menu. The same approach can also be used with React to set a default value if we are not using React Select Component.However, if you are using react-select then you need to follow a different approach as covered below.. Following are the two approaches to set default value in select using

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How to convert CSV File to PDF File using Python

For this section of tutorial we will be using : pandas.read_csv(): read_csv is an important pandas function to read CSV files and do operations on it.We will be using it to read our input CSV file..to_html(): With help of DataFrame.to_html() method, we can get the html format of a dataframe by using DataFrame.to_html() method.This function takes in a CSV file as input, converts it, and saves

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How to communicate JSON data between Python and Node.js

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How to pass data from one component to other component in

Step 1: Create a React application using the following command. npx create-react-app myapp. Step 2: After creating your project folder i.e. myapp, move to it using the following command. cd myapp. Project Structure: It will look like the following. We have created two Components named Child.js and Parent.js as shown below.

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How to create Responsive Profile Card using HTML and CSS

CSS Code: CSS is used to give different types of animations and effect to our HTML page so that it looks interactive to all users. In CSS, we have to remind the following points-Restore all the browser effects. Use classes and ids to give effects to HTML elements. Use of nth-child selector feature of CSS to call different links.

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How to import a SVG file in JavaScript

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How to connect NodeJS with ReactJS

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How to get multiple requests with ExpressJS

Express.js is the most powerful framework of the node.js.Express.js is a routing and Middleware framework for handling the different routing of the webpage, and it works between the request and response cycle. Express.js use different kinds of middleware functions in order to complete the different requests made by the client for e.g. client can make get, put, post, and delete requests …

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SQL Query to convert NUMERIC to NVARCHAR

To verify the contents of the table use the below statement: SELECT * FROM person; Now let’s convert NUMBERIC values to NVARCHAR using three different methods. Using the CONVERT () function: Syntax: SELECT CONVERT (<DATA_TYPE>, <VALUE>); --DATA_TYPE is the type we want to convert to. --VALUE is the value we want to convert into DATA_TYPE.

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ToolBar in Android with Example

In Android applications, Toolbar is a kind of ViewGroup that can be placed in the XML layouts of an activity.It was introduced by the Google Android team during the release of Android Lollipop(API 21).The Toolbar is basically the advanced successor of the ActionBar.It is much more flexible and customizable in terms of appearance and functionality.

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How to pass optional parameters to a function in Python

In this way, the user can call the function by either passing those optional parameters or just passing the required parameters. There are two main ways to pass optional parameters in python. Without using keyword arguments. By using keyword arguments.

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Create Password Protected Zip of a file using Python

ZIP is an archive file format that supports lossless data compression. By lossless compression, we mean that the compression algorithm allows the original data to be perfectly reconstructed from the compressed data.

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How to validate GUID (Globally Unique Identifier) using

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How to generate a random number between 0 and 1 in Python

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SQL Query to Display First 50% Records from Employee Table

SQL Query to Display First 50% Records from Employee Table. Last Updated : 13 Apr, 2021. Here, we are going to see how to display the first 50% of records from an Employee Table in MS SQL server’s databases. For the purpose of the demonstration, we will be creating an Employee table in a database called “ geeks “.

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Joining 4 Tables in SQL

Approach : Here, we will discuss the approach and steps to implement Joining 4 Tables in SQL. So, let’s start by creating a Database. Step-1: Create a database –. Here first, we will create the database using SQL query as follows. CREATE DATABASE geeksforgeeks; Step-2: Use the database –.

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How to get the process id from Python Multiprocess

In this article, we will see how to get the process id from Python Multiprocess For this we should make use of method multiprocessing.current_process() to get the multiprocess id. Multiprocessing refers to the ability of a system to support more than one processor at the same time.

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How to Scrape Nested Tags using BeautifulSoup

Step 1: The first step will be for scraping we need to import beautifulsoup module and get the request of the website we need to import the requests module. Step 2: The second step will be to request the URL call get method. Step 3: The third step will be for creating soup use beautifulsoup method and for the HTML parse tree use an HTML parser.

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How to Read Data from SQLite Database in Android

Navigate to the app > java > your app’s package name > DBHandler and add the below code to it. In this, we are simply adding a new method for reading all the courses from the SQLite database. Below is the updated code for the DBHandler.java file after adding the above code snippet.

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Node.js console.timeStamp() Method

The console.timeStamp () (Added in v8.0.0) method is an inbuilt application programming interface of the ‘ console ‘ module which does not display anything unless used in the inspector. This method adds an event with the label ‘ label ‘ to the Timeline panel of the inspector. Note: The global console methods are neither consistently

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How to Save Output of Command in a File in Linux

To see the output on the terminal and also save it into the file we can use the tee command. It sends the output of the file as well as to the terminal. First, let’s see how to use the tee operator using the pipeline. Following is the syntax of using the tee operator: command | tee outfile.txt.

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rm command in Linux with examples

3. -r (Recursive Deletion): With -r (or -R) option rm command performs a tree-walk and will delete all the files and sub-directories recursively of the parent directory. At each stage it deletes everything it finds. Normally, rm wouldn’t delete the directories but when used with this option, it will delete. Below is the tree of directories

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Convert birth date to age in Pandas

Output: Explanation: In above code used pandas and datetime package.We created a dataframe of DOB having three rows of different dates. To calculate age we created an age function that uses strptime function to identify the date in date/month/year format.

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How to remove white spaces from a string using jQuery

jQuery.trim ( str ) Parameters: This method accepts a single parameter string that is to be trimmed. In this case, we write string containing white spaces in <pre> tag and then apply trim () method to remove all white spaces from starting and ending position. After removing the white spaces we use html () method to display the trimmed string.

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How to make Incremental and Decremental counter using HTML

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How to invert the elements of a boolean array in Python

Method 3: We can also use the Tilde operator ( ~) also known as bitwise negation operator in computing to invert the given array. It takes the number n as binary number and “flips” all 0 bits to 1 and 1 to 0 to obtain the complement binary number. So in the boolean array for True or 1 it will result in -2 and for False or 0 it will result

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How to Install Social Engineering Toolkit in Kali Linux

Social engineering toolkit is a free and open-source tool that is used for social engineering attacks such as phishing, faking phone numbers, sending SMS, etc. it’s a free tool available in Kali Linux or you can directly download and install it from Github.

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How to Add Axes to a Figure in Matplotlib with Python

Matplotlib is a library in Python used to create figures and provide tools for customizing it. It allows plotting different types of data, geometrical figures. In this article, we will see how to add axes to a figure in matplotlib.

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How to Convert Java Code to Kotlin Code in Android Studio

Step 2: Select the option. From the left-hand side Option menu, select Android Project and right-click on the source code file. Select the option “Convert Java File to Kotlin File”.One can also use the shortcut command “Ctrl+Alt+Shift+K” while the file is opened in Android Studio.. A dialog box will appear that asks permission to configure Kotlin in Project.

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How to Read Data from Firebase Firestore in Android

Step 2: Now we will create new Activity for displaying our data from Firebase Firestore in RecyclerView. To create a new Activity we have to navigate to the app > java > your app’s package name > Right click on package name > New > Empty Activity and name your activity as CourseDetails and create new Activity. Make sure to select the empty activity.

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How to uncompress a ".tar.gz" file using Python

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How to Create Group BarChart in Android

As we have seen how we can create a beautiful bar chart in Android but what if we have to represent data in the form of groups in our bar chart. So that we can plot a group of data in our bar chart. So we will be creating a Group Bar Chart in our Android app in this article.

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Why it is important to write "using namespace std" in C++

Explanation: It is known that “std” (abbreviation for the standard) is a namespace whose members are used in the program. So the members of the “std” namespace are cout, cin, endl, etc. This namespace is present in the iostream.h header file. Below is the code snippet in C++ showing content written inside iostream.h:

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