Stackabuse.com how to use, tutorial

How to Randomly Select Elements From a List in Python

Details: Introduction Selecting a random element or value from a list is a common task - be it for randomized result from a list of recommendations or just a random prompt. In this article, we'll take a look at how to randomly select elements from a list in Python. We'll cover the retrieval of both singular random elements, as well as retrieving multiple elements - with and without repetition

› Verified 3 days ago

› Url: https://stackabuse.com/how-to-randomly-select-elements-from-a-list-in-python/ Go Now

› Get more:  How To UseGo Now

How to Iterate Over a Dictionary in Python

Details: Introduction. Dictionaries are one of the most used data structures in all of software development, and for a good reason. They allow us to store our data in neat key, value pairs, which in turn gives us the ability to, on average, access our data in O(1) time.. While using a dictionary it's important to know how to iterate over it. Not being able to recover the data you stored makes it

› Verified 3 days ago

› Url: https://stackabuse.com/how-to-iterate-over-a-dictionary-in-python/ Go Now

› Get more:  How To UseGo Now

How to Split a String in Java - Stack Abuse

Details: Introduction Oftentimes, we are faced with a situation where we need to split a string at some specific character or substring, to derive some useful information from it. For example, we might want to split a phone number on the country code or data imported from a CSV file. In this article, we'll cover how to split a String in Java. The split() Method (Without a Limit) This method takes one

› Verified 5 days ago

› Url: https://stackabuse.com/how-to-split-a-string-in-java/ Go Now

› Get more:  How To UseGo Now

How to Permanently Set $PATH in Linux - Stack Abuse

Details: Tendai Mutunhire started out doing Java development for large corporations, then taught startup teams how to code at the MEST incubator, and is in the process of launching a few startups of his own.

› Verified 2 days ago

› Url: https://stackabuse.com/how-to-permanently-set-path-in-linux/ Go Now

› Get more:  How To UseGo Now

Covariance and Correlation in Python - Stack Abuse

Details: Introduction Working with variables in data analysis always drives the question: How are the variables dependent, linked, and varying against each other? Covariance and Correlation measures aid in establishing this. > Covariance brings about the variation across variables. We use covariance to measure how much two variables change with each other. Correlation reveals the relation between the

› Verified 3 days ago

› Url: https://stackabuse.com/covariance-and-correlation-in-python/ Go Now

› Get more:  How To UseGo Now

Parsing HTML with BeautifulSoup in Python

Details: Introduction Web scraping is programmatically collecting information from various websites. While there are many libraries and frameworks in various languages that can extract web data, Python has long been a popular choice because of its plethora of options for web scraping. This article will give you a crash course on web scraping in Python with Beautiful Soup - a popular Python library for

› Verified 2 days ago

› Url: https://stackabuse.com/guide-to-parsing-html-with-beautifulsoup-in-python/ Go Now

› Get more:  How To UseGo Now

Creating a Neural Network from Scratch in Python

Details: In the above table, we have five columns: Person, Smoking, Obesity, Exercise, and Diabetic. Here 1 refers to true and 0 refers to false. For instance, the first person has values of 0, 1, 0 which means that the person doesn't smoke, is obese, and doesn't exercise.

› Verified 3 days ago

› Url: https://stackabuse.com/creating-a-neural-network-from-scratch-in-python/ Go Now

› Get more:  How To UseGo Now

Remove Element from an Array in Java - Stack Abuse

Details: Introduction This tutorial will go through some common techniques for removing elements from Java arrays. Manipulating array elements is an extremely common task as discussions about it can be found on many forums, particularly on StackOverflow. Here's a list of the techniques and methods we'll go over in this article: * Using Two Arrays * ArraysUtils.remove() * Using a for loop * System

› Verified 2 days ago

› Url: https://stackabuse.com/remove-element-from-an-array-in-java/ Go Now

› Get more:  TutorialGo Now

Working with PDFs in Python: Reading and Splitting Pages

Details: Below we will focus on PyPDF2 and PyMuPDF, and explain how to extract text and images in the easiest way possible. In order to understand the usage of PyPDF2 a combination of the official documentation and a lot of examples that are available from other resources helped.

› Verified 2 days ago

› Url: https://stackabuse.com/working-with-pdfs-in-python-reading-and-splitting-pages/ Go Now

› Get more:  How To UseGo Now

Linear Regression in Python with Scikit-Learn

Details: There are two types of supervised machine learning algorithms: Regression and classification. The former predicts continuous value outputs while the latter predicts discrete outputs. For instance, predicting the price of a house in dollars is a regression problem whereas predicting whether a tumor is malignant or benign is a classification problem.

› Verified 2 days ago

› Url: https://stackabuse.com/linear-regression-in-python-with-scikit-learn/ Go Now

› Get more:  How To UseGo Now

Matplotlib Line Plot - Tutorial and Examples

Details: Introduction. Matplotlib is one of the most widely used data visualization libraries in Python. From simple to complex visualizations, it's the go-to library for most. In this tutorial, we'll take a look at how to plot a line plot in Matplotlib - one of the most basic types of plots.. Line Plots display numerical values on one axis, and categorical values on the other.

› Verified 2 days ago

› Url: https://stackabuse.com/matplotlib-line-plot-tutorial-and-examples/ Go Now

› Get more:  TutorialGo Now

Seaborn Box Plot - Tutorial and Examples - Stack Abuse

Details: Introduction Seaborn is one of the most widely used data visualization libraries in Python, as an extension to Matplotlib. It offers a simple, intuitive, yet highly customizable API for data visualization. In this tutorial, we'll take a look at how to plot a Box Plot in Seaborn. > Box plots are used to visualize summary statistics of a dataset, displaying attributes of the distribution like

› Verified 2 days ago

› Url: https://stackabuse.com/seaborn-box-plot-tutorial-and-examples/ Go Now

› Get more:  TutorialGo Now

Convert Bytes to String in Python

Details: Introduction In this article, we'll take a look at how to convert Bytes to a String in Python . By the end of this article you will have a clear idea of what these types are and how to effectively handle data using them. Depending on the version of Python you're using, this task will differ. Although Python 2 has reached its end of life, many projects still use it, so we'll include both the

› Verified 2 days ago

› Url: https://stackabuse.com/convert-bytes-to-string-in-python/ Go Now

› Get more:  How To UseGo Now

Change Font Size in Matplotlib - Stack Abuse

Details: Introduction Matplotlib is one of the most widely used data visualization libraries in Python. Much of Matplotlib's popularity comes from its customization options - you can tweak just about any element from its hierarchy of objects. In this tutorial, we'll take a look at how to change the font size in Matplotlib . Change Font Size in Matplotlib There are a few ways you can go about changing

› Verified 3 days ago

› Url: https://stackabuse.com/change-font-size-in-matplotlib/ Go Now

› Get more:  TutorialGo Now

How to Rename Pandas DataFrame Column in Python

Details: Introduction. Pandas is a Python library for data analysis and manipulation. Almost all operations in pandas revolve around DataFrames.. A Dataframe is is an abstract representation of a two-dimensional table which can contain all sorts of data. They also enable us give all the columns names, which is why oftentimes columns are referred to as attributes or fields when using DataFrames.

› Verified 2 days ago

› Url: https://stackabuse.com/how-to-rename-pandas-dataframe-column-in-python/ Go Now

› Get more:  How To UseGo Now

Seaborn Bar Plot - Tutorial and Examples - Stack Abuse

Details: Introduction Seaborn is one of the most widely used data visualization libraries in Python, as an extension to Matplotlib. It offers a simple, intuitive, yet highly customizable API for data visualization. In this tutorial, we'll take a look at how to plot a Bar Plot in Seaborn. Bar graphs display numerical quantities on one axis and categorical variables on the other, letting you see how many

› Verified 3 days ago

› Url: https://stackabuse.com/seaborn-bar-plot-tutorial-and-examples/ Go Now

› Get more:  TutorialGo Now

Gradient Descent in Python: Implementation and Theory

Details: Introduction This tutorial is an introduction to a simple optimization technique called gradient descent, which has seen major application in state-of-the-art machine learning models. We'll develop a general purpose routine to implement gradient descent and apply it to solve different problems, including classification via supervised learning. In this process, we'll gain an insight into the

› Verified 2 days ago

› Url: https://stackabuse.com/gradient-descent-in-python-implementation-and-theory/ Go Now

› Get more:  TutorialGo Now

Reading and Writing YAML to a File in Python

Details: Introduction. In this tutorial, we're going to learn how to use the YAML library in Python 3. YAML stands for Yet Another Markup Language.. In recent years it has become very popular for its use in storing data in a serialized manner for configuration files.

› Verified 2 days ago

› Url: https://stackabuse.com/reading-and-writing-yaml-to-a-file-in-python/ Go Now

› Get more:  How to useGo Now

How to Merge Two Dictionaries in Python - Stack Abuse

Details: Introduction. It's not uncommon to have two dictionaries in Python which you'd like to combine. In this article, we will take a look at various ways on how to merge two dictionaries in Python.. Some solutions are not available to all Python versions, so we will examine ways to merge for selected releases too.

› Verified 3 days ago

› Url: https://www.stackabuse.com/how-to-merge-two-dictionaries-in-python/ Go Now

› Get more:  How To UseGo Now

Matplotlib: Change Scatter Plot Marker Size

Details: Introduction Matplotlib is one of the most widely used data visualization libraries in Python. Much of Matplotlib's popularity comes from its customization options - you can tweak just about any element from its hierarchy of objects. In this tutorial, we'll take a look at how to change the marker size in a Matplotlib scatter plot. Import Data We'll use the World Happiness [https://www.kaggle

› Verified 4 days ago

› Url: https://stackabuse.com/matplotlib-change-scatter-plot-marker-size/ Go Now

› Get more:  TutorialGo Now

Python: How to Add Keys to Dictionary

Details: Introduction A dictionary in Python is a collection of items that store data as key-value pairs. We can access and manipulate dictionary items based on their key. Dictionaries are mutable and allow us to add new items to them. The quickest way to add a single item to a dictionary is by using referencing a dictionary's index with a new key and assigning a value. For example, we add a new key

› Verified 3 days ago

› Url: https://stackabuse.com/python-how-to-add-keys-to-dictionary/ Go Now

› Get more:  How To UseGo Now

Matplotlib Scatter Plot - Tutorial and Examples

Details: Introduction. Matplotlib is one of the most widely used data visualization libraries in Python. From simple to complex visualizations, it's the go-to library for most. In this tutorial, we'll take a look at how to plot a scatter plot in Matplotlib.. Import Data

› Verified 2 days ago

› Url: https://stackabuse.com/matplotlib-scatterplot-tutorial-and-examples/ Go Now

› Get more:  TutorialGo Now

Get HTTP POST Body in Spring Boot with @RequestBody

Details: Introduction With Spring, we map requests to request handlers via the @RequestMapping annotation. Spring Boot introduced us to derived types of this annotation - @GetMapping, @PostMapping, @DeleteMapping, etc. These requests contain different types of information and data - and depending on what our endpoint does with the request, we may want to retrieve the body of a POST request either for

› Verified 3 days ago

› Url: https://stackabuse.com/get-http-post-body-in-spring/ Go Now

› Get more:  How To UseGo Now

Matplotlib Histogram Plot - Tutorial and Examples

Details: Introduction Matplotlib is one of the most widely used data visualization libraries in Python. From simple to complex visualizations, it's the go-to library for most. In this tutorial, we'll take a look at how to plot a histogram plot in Matplotlib. Histogram plots are a great way to visualize distributions of data - In a histogram, each bar groups numbers into ranges. Taller bars show that

› Verified 2 days ago

› Url: https://stackabuse.com/matplotlib-histogram-plot-tutorial-and-examples/ Go Now

› Get more:  TutorialGo Now

Reading and Writing JSON in Kotlin with Jackson

Details: In this article we'll be taking a look at how to read and write JSON files in Kotlin, specifically, using the Jackson library. Jackson Dependency To utilize Jackson, we'll want to add its jackson-module-kotlin dependency to our project. If you're using Maven, you can simply add: com.fasterxml.jackson.module jackson-module-kotlin

› Verified 4 days ago

› Url: https://stackabuse.com/reading-and-writing-json-in-kotlin-with-jackson/ Go Now

› Get more:  How To UseGo Now

Python: Get Number of Days Between Dates

Details: Introduction. In this tutorial, we'll take a look at how to get the number of days between two dates in Python.. We'll be using the built-in datetime package, that allows you to really easily work with datetime objects in Python.. Creating a Datetime Object. As datetime is a built-in module, you can access it right away by importing it at the top of your Python file.

› Verified 3 days ago

› Url: https://www.stackabuse.com/python-get-number-of-days-between-dates/ Go Now

› Get more:  TutorialGo Now

How to Convert a String to Date in Java - Stack Abuse

Details: Converting a string to a date in Java (or any programming language) is a fundamental skill and is useful to know when working on projects. Sometimes, it's simply easier to work with a string to represent a date, and then convert it into a Date object for further use. In this article, we'll go over the many methods and libraries you can use to convert a Java string into a date object.

› Verified 2 days ago

› Url: https://www.stackabuse.com/how-to-convert-a-string-to-date-in-java/ Go Now

› Get more:  How To UseGo Now

Rotate Axis Labels in Matplotlib - Stack Abuse

Details: Introduction Matplotlib is one of the most widely used data visualization libraries in Python. Much of Matplotlib's popularity comes from its customization options - you can tweak just about any element from its hierarchy of objects. In this tutorial, we'll take a look at how to rotate axis text/labels in a Matplotlib plot. Creating a Plot Let's create a simple plot first: import matplotlib

› Verified 3 days ago

› Url: https://stackabuse.com/rotate-axis-labels-in-matplotlib/ Go Now

› Get more:  TutorialGo Now

How to Iterate over Rows in a Pandas DataFrame

Details: Introduction Pandas is an immensely popular data manipulation framework for Python. In a lot of cases, you might want to iterate over data - either to print it out, or perform some operations on it. In this tutorial, we'll take a look at how to iterate over rows in a Pandas DataFrame. If you're new to Pandas, you can read our beginner's tutorial [/beginners-tutorial-on-the-pandas-python

› Verified 2 days ago

› Url: https://www.stackabuse.com/how-to-iterate-over-rows-in-a-pandas-dataframe/ Go Now

› Get more:  TutorialGo Now

JavaScript: Check if First Letter of a String Is Upper Case

Details: Introduction In English, it's essential to capitalize the first letter of a sentence. JavaScript has built-in methods to help us with this. In this article we will look at three different ways to check if the first letter of a string is upper case and how to capitalize it. Check if First Letter Is Upper Case in JavaScript We can check if the first of a letter a string is upper case in a few

› Verified 2 days ago

› Url: https://stackabuse.com/javascript-check-if-first-letter-of-a-string-is-upper-case/ Go Now

› Get more:  How To UseGo Now

Handling CORS with Node.js

Details: Introduction In this article, we are going to take a look at what CORS is, how you can configure CORS with Express, and how to customize the CORS middleware to your needs. What is CORS CORS is shorthand for Cross-Origin Resource Sharing. It is a mechanism to allow or restrict requested resources on a web server depend on where the HTTP request was initiated. This policy is used to secure a

› Verified 2 days ago

› Url: https://stackabuse.com/handling-cors-with-node-js/ Go Now

› Get more:  How To UseGo Now

Calculating Variance and Standard Deviation in Python

Details: Introduction. Two closely related statistical measures will allow us to get an idea of the spread or dispersion of our data. The first measure is the variance, which measures how far from their mean the individual observations in our data are.The second is the standard deviation, which is the square root of the variance and measures the amount of variation or dispersion of a dataset.

› Verified 2 days ago

› Url: https://stackabuse.com/calculating-variance-and-standard-deviation-in-python/ Go Now

› Get more:  How To UseGo Now

Guide to Apache Commons' StringUtils Class in Java

Details: Introduction. The Apache Commons library provides many new interfaces, implementations and classes that expand on the core Java Framework. It's one of the top third-party libraries and is present in many projects. In this article, we've compiled a Guide to Apache Commons' StringUtils class, which provides some very good utilities and tools for working with Strings, expanding on the

› Verified 3 days ago

› Url: https://stackabuse.com/guide-to-apache-commons-stringutils-class-in-java/ Go Now

› Get more:  GuideGo Now

Python: Check Index of an Item in a List

Details: Introduction Lists are useful in different ways compared to other datatypes because of how versatile they are. In this article we'll take a look at one of the most common operations with lists - finding the index of an element. We will take a look at different scenarios of finding an element, i.e. finding the first, last, and all occurrences of an element. As well as what happens when the

› Verified 3 days ago

› Url: https://stackabuse.com/python-check-index-of-an-item-in-a-list/ Go Now

› Get more:  How To UseGo Now

Calculating Pearson Correlation Coefficient in Python with

Details: Introduction. This article is an introduction to the Pearson Correlation Coefficient, its manual calculation and its computation via Python's numpy module.. The Pearson correlation coefficient measures the linear association between variables. Its value can be interpreted like so: +1 - Complete positive correlation +0.8 - Strong positive correlation +0.6 - Moderate positive correlation

› Verified 2 days ago

› Url: https://stackabuse.com/calculating-pearson-correlation-coefficient-in-python-with-numpy/ Go Now

› Get more:  How To UseGo Now

Matplotlib Bar Plot - Tutorial and Examples

Details: Introduction Matplotlib is one of the most widely used data visualization libraries in Python. From simple to complex visualizations, it's the go-to library for most. In this tutorial, we'll take a look at how to plot a bar plot in Matplotlib. Bar graphs display numerical quantities on one axis and categorical variables on the other, letting you see how many occurrences there are for the

› Verified 2 days ago

› Url: https://stackabuse.com/matplotlib-bar-plot-tutorial-and-examples/ Go Now

› Get more:  TutorialGo Now

Ultimate Guide to Heatmaps in Seaborn with Python

Details: Introduction A heatmap is a data visualization technique that uses color to show how a value of interest changes depending on the values of two other variables. For example, you could use a heatmap to understand how air pollution varies according to the time of day across a set of cities. Another, perhaps more rare case of using heatmaps is to observe human behavior - you can create

› Verified 2 days ago

› Url: https://stackabuse.com/ultimate-guide-to-heatmaps-in-seaborn-with-python/ Go Now

› Get more:  How To UseGo Now

Replace Occurrences of a Substring in a String with Python

Details: Introduction Replacing all or n occurrences of a substring in a given string is a fairly common problem of string manipulation and text processing in general. Luckily, most of these tasks are made easy in Python by its vast array of built-in functions, including this one. Let's say, we have a string that contains the following sentence: The brown-eyed man drives a brown car. Our goal is to

› Verified 2 days ago

› Url: https://stackabuse.com/replace-occurrences-of-a-substring-in-string-with-python/ Go Now

› Get more:  How To UseGo Now

JavaScript: Check if String Contains a Substring

Details: A common operation in many programming languages is to check if a string contains another string. While it's a simple and common task, the method names often differ between programming languages. For example, here is a small sample of the methods used to achieve this in various languages: * Java: String.contains(), String.indexOf(), etc. * Python: in operator, String.index(), String.find

› Verified 2 days ago

› Url: https://stackabuse.com/javascript-check-if-string-contains-a-substring/ Go Now

› Get more:  How To UseGo Now

Python: How to Handle Missing Data in Pandas DataFrame

Details: Introduction. Pandas is a Python library for data analysis and manipulation. Almost all operations in pandas revolve around DataFrames, an abstract data structure tailor-made for handling a metric ton of data.. In the aforementioned metric ton of data, some of it is bound to be missing for various reasons. Resulting in a missing (null/None/Nan) value in our DataFrame.

› Verified 2 days ago

› Url: https://stackabuse.com/python-how-to-handle-missing-dataframe-values-in-pandas/ Go Now

› Get more:  How To UseGo Now

Node HTTP Servers for Static File Serving

Details: One of the most fundamental uses of an HTTP server is to serve static files to a user's browser, like CSS, JavaScript, or image files. Beyond normal browser usage, there are thousands of other reasons you'd need to serve a static files, like for downloading music or scientific data. Either way, you'll need to come up with a simple way to let the user download these files from your server. One

› Verified 2 days ago

› Url: https://stackabuse.com/node-http-servers-for-static-file-serving/ Go Now

› Get more:  How To UseGo Now

Java REST API Documentation with Swagger2

Details: Introduction. In this article, we'll dive into the Swagger framework.We'll use Swagger2 to design, build, and document a Spring Boot RESTful API and Swagger UI to observe our endpoints and test them.. What is Swagger? Swagger is the most widely used tool for building APIs compliant to the OpenAPI Specification (OAS).. Swagger itself is a set of open-source tools built around the OAS that can

› Verified 3 days ago

› Url: https://stackabuse.com/java-rest-api-documentation-with-swagger2/ Go Now

› Get more:  How To UseGo Now

Python String Interpolation with the Percent (%) Operator

Details: There are a number of different ways to format strings in Python, one of which is done using the % operator, which is known as the string formatting (or interpolation) operator. In this article we'll show you how to use this operator to construct strings with a template string and variables containing your data. The % Operator This way of working with text has been shipped with Python since

› Verified 2 days ago

› Url: https://stackabuse.com/python-string-interpolation-with-the-percent-operator/ Go Now

› Get more:  How to useGo Now

How to Use the Crontab Command in Unix - Stack Abuse

Details: The users can copy their scripts to the appropriate directories depending on which frequency they need to be run. The crontab file present in /etc/crontab contains the cron expressions defined for each directory and it checks every minute if the time is right for the scripts are to be executed:. Note that scripts placed in these special folders are system-wide cron jobs and not user-specific ones.

› Verified 2 days ago

› Url: https://stackabuse.com/how-to-use-the-crontab-command-in-unix/ Go Now

› Get more:  How To UseGo Now

Using __slots__ to Store Object Data in Python

Details: Introduction In Python, every object instance comes pre-built with standard functions and attributes. For example, Python uses a dictionary to store an object's instance attributes. This has many benefits, like allowing us to add new attributes at runtime. However, this convenience comes at a cost. Dictionaries can consume a fair chunk of memory, especially if we have many instance objects

› Verified 2 days ago

› Url: https://stackabuse.com/using-slots-to-store-object-data-in-python/ Go Now

› Get more:  How To UseGo Now

How to Upload Files with Python's Requests Library

Details: Introduction. Python is supported by many libraries which simplify data transfer over HTTP. The requests library is one of the most popular Python packages as it's heavily used in web scraping. It's also popular for interacting with servers! The library makes it easy to upload data in a popular format like JSON, but also makes it easy to upload files as well.

› Verified 2 days ago

› Url: https://stackabuse.com/how-to-upload-files-with-pythons-requests-library/ Go Now

› Get more:  How To UseGo Now

How to Convert a Java Array to ArrayList - Stack Abuse

Details: Introduction In this tutorial, we'll be converting an array into a more versatile ArrayList in Java. * Arrays.asList() * new ArrayList<>(Arrays.asList()) (Most popular and used approach) * new ArrayList<>(List.of()) * Collections.addAll() * Collectors.toList() * Collectors.toCollection() * Lists.newArrayList() Arrays are simple and provide the basic functionality of grouping together a

› Verified 4 days ago

› Url: https://stackabuse.com/how-to-convert-a-java-array-to-arraylist/ Go Now

› Get more:  TutorialGo Now

Java: Convert Array to Stream - Stack Abuse

Details: Introduction In this tutorial, we'll be converting a Java Array into a Java Stream for primitive types, as well as objects. This can be done either via Arrays.stream() , as well as Stream.of(). Arrays.stream() A good way to turn an array into a stream is to use the Arrays class' stream() method. This works the same for both primitive types and objects. Primitive Types For primitive types, you

› Verified 2 days ago

› Url: https://stackabuse.com/java-convert-array-to-stream/ Go Now

› Get more:  TutorialGo Now

Using Sequelize ORM with Node.js and Express

Details: Introduction. Sequelize is a popular ORM created for Node.js, and in this tutorial we'll be using it to build a CRUD API to manage notes.. Interacting with databases is a common task for backend applications. This was typically done via raw SQL queries, which can be difficult to construct, especially for those new to SQL or databases in general.

› Verified 1 days ago

› Url: https://stackabuse.com/using-sequelize-orm-with-nodejs-and-express/ Go Now

› Get more:  TutorialGo Now

How to Set Axis Range (xlim, ylim) in Matplotlib

Details: Introduction. Matplotlib is one of the most widely used data visualization libraries in Python. Much of Matplotlib's popularity comes from its customization options - you can tweak just about any element from its hierarchy of objects.. In this tutorial, we'll take a look at how to set the axis range (xlim, ylim) in Matplotlib, to truncate or expand the view to specific limits.

› Verified 2 days ago

› Url: https://stackabuse.com/how-to-set-axis-range-xlim-ylim-in-matplotlib/ Go Now

› Get more:  TutorialGo Now

Related topics