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There are several ways to extract unique values from a column in a data frame using Python Pandas, including unique() and nunique(). The panda's library in Python is mostly used for data analysis and manipulation to locate unique values in a data frame column. Some common methods to get unique values from a column are as follows: unique(): This method will return the unique values of a Series or DataFrame column as a NumPy array. ... Read More
Sometimes we want to set a base attribute to everything and allow more specific selectors to adjust it for certain elements as needed. There are also cases, especially when doing brief temporary testing, where we want a font to apply to all text no matter what. Ways to Set Global Font You can use the below-mentioned approaches to set the global font to your entire HTML document. Using Universal Selector Using !important Keyword Get Started with Approaches Here you will see an example of each approach mentioned above ... Read More
In this article, we will understand how to print a collection in Java. The Collection is a framework that provides architecture to store and manipulate the group of objects. Java Collections can achieve all the operations that you perform on a data such as searching, sorting, insertion, manipulation, and deletion. Problem Statement Write a program in Java to print a Collection. Below is a demonstration of the same − Input Run the program Output The Elements of the collection are: Language : Java | Language_id : 101 Language : Scala | Language_id : 102 Language : Python | Language_id : ... Read More
In this program, we will convert a string to both lowercase and uppercase using toLowerCase() and toUpperCase() methods of Java. The toUpperCase() method converts all of the characters in this String to upper case using the rules of the default locale. The toLowerCase() method converts all of the characters in this String to lowercase using the rules of the default locale. Problem Statement Write a Java program that converts strings to lowercase and uppercase using the toLowerCase() and toUpperCase() methods − Input SELF LEARNING CENTER TUTORIALS POINT This is TutorialsPoint www.tutorialspoint.com Output string value = self learning centrestring value = ... Read More
Problem Statement Two matrices are identical if their number of rows and columns are equal and the corresponding elements are also equal. An example of this is given as follows. Input Matrix A = 1 2 3 4 5 6 7 8 9 Matrix B = 1 2 3 4 5 6 7 8 9 The matrices A and B are identical Output Both the matrices are identical Steps to check if two given matrices are identical Following are the steps to check if two given matrices are identical − Initialize two matrices by defining two ... Read More
DatabaseMetaData DatabaseMetaData is an interface that provides methods to access metadata about the database itself. getPrimaryKeys() method The getPrimaryKeys() method of the DatabaseMetaData interface in Java is used to retrieve information about the primary keys of a table in a database. A primary key is a unique identifier for each record in a table. It accepts 3 parameters − catalog - A string parameter representing the name of the catalog (database in general) in which the table exists, pass "" to get the description of the ... Read More
In this program, we will learn how to set a custom icon in a JOptionPane using Java's Swing framework. A JOptionPane allows displaying dialog boxes for different purposes such as messages, inputs, or confirmations. In this example, we will create a dialog box with a custom image icon displayed alongside some text. This can be particularly useful for creating visually appealing user interfaces. Problem Statement Write a Java program to set an icon for JOptionPane. Below is the demonstration of the same − Output Steps to set an icon for JOptionPane Following are the steps to set an ... Read More
To set the default value for an HTML element, we can use HTML selected attribute. It is used when you want to display a predefined value on your drop down menu. In this article we are having a dropdown list of four options, our task is to set the default value for an HTML select element. Steps to Set Default Value for select Element We will be following below mentioned steps to set the default value for HTML select element: We have created a dropdown list using select tag and then added options ... Read More
Big Data and Data Warehousing are specialized systems used for data storage, processing, and retrieval. These systems support handling large volumes of data, various types datasets in real time and give you historical data analysis for strategic decision-making. You can implement scalable architectures to manage the needs of organizations. Big Data systems focus on the efficient storage and processing of structured, semi-structured, and unstructured data from multiple sources. In contrast, Data Warehousing systems are optimized for structured data analysis and reporting. These systems create frameworks for organizations for insights and make data-driven decisions. Both Big Data and Data Warehousing are ... Read More
Genetic Algorithms You can mimic the process of genetic inheritance, like how traits are passed down from parents to children in nature by using it. You can solve various problems, in fields that involve analyzing data successfully in these algorithms.Genetic algorithms are used in data mining. Data mining is the process of discovering important patterns and relationships in large sets of data. It helps identify the most interesting and meaningful patterns in databases by combining human insights with automated data analysis. How Do Genetic Algorithms Work? Genetic algorithms require a specific structure to function. You can operate on a population, ... Read More