Python Sets: A Guide
Often, when you’re working with data, you’ll want to store a list of data that cannot contain any duplicate values, and whose values cannot be changed. For instance, if you’re making a list of purchase IDs at a grocery store,…
CSS Attribute Selector
CSS selectors allow web developers to apply styles to a particular element or set of elements on a web page. When working with selectors, you may decide you want to target only elements with a particular attribute. That’s where the…
Git Branch
Branching is a feature in almost all modern version control systems. Branches allow developers to move away from the main version of their code and make changes to their code without updating the main version of the code. In other…
CSS Syntax
The first topic you’ll need to master before writing code using CSS is syntax. The word syntax may sound intimidating, but it simply refers to the rules we use in CSS to write out code. These rules are standard, which…
How to Initialize ArrayList in Java
The Java Arrays.asList() method and ArrayList class are used to initialize arrays in Java. The normal List interface cannot be used to create arrays, so the ArrayList class is required to create an empty array. The Java Arrays.asList() method allows…
6 Reasons Why You Should Learn Python
Learning how to code, whether using Python or another language, is one of the best investments you can make in yourself. It is not difficult to come up with a list of reasons this is the case. First, learning to…
6 Reasons Why You Should Learn Java
“What is the best programming language to learn?” is a common question asked by beginners who are thinking about learning to code. It’s a good question, too. Learning how to code is intense and a big challenge, so you’ll want…
Git Tag
Tagging is a feature used to keep track of specific points in a Git repository’s history. Over time, when you’re working with a Git repository, you’ll make a large number of changes to your codebase. In Git, commits are used…
Git Commit
Saving changes to a Git repository is not as simple as just saving a file. The Git version control system uses a more elaborate method of tracking changes, which allows developers to have more granular control over the changes they…
CSS Active
When you’re designing a website, you may want to apply a style to an element when it is being activated by the user. For instance, you may want the color of a button or a link to change when the…
CSS Blur
When you’re designing a website, you may decide that you want to add a blur effect to a particular image. For instance, if you’re designing a website for a coffee house, you may want to blur an image so that…
How to Create a CSS Hero Image
Hero images are a common feature on websites. Hero images, often placed at the top of a page on a website, are large images with text that appears in front of the image. Hero images allow you to add a…
Python Add to Dictionary: A Guide
Dictionaries are used to store data using the key-value structure in Python. When you’re working with dictionaries, you may ask yourself, how can I add an item to a dictionary? This article will answer that question. We’ll break down the…
Python List Methods: A Step-By-Step Guide
Lists are a built-in data structure in Python 3. Python Lists can be used to organize and store data in an ordered way, such as names of suppliers for a manufacturing company, salary information for a company’s employees, a list…
Python Inheritance: A Step-By-Step Guide
Python inheritance is when a subclass uses the code from another class. Inheritance is an essential feature in object-oriented languages like Python that makes coding easier and more efficient. Python is an object-oriented language, which means that it supports creating…
Python Filter: A Step-By-Step Tutorial
The Python filter() method is used to filter lists, sets, and tuples. filter() follows any provided criteria to filter an iterable object, and returns the filtered result. When you’re programming, you may have a list of values that you want…
A Complete Guide to Python Data Types
Data types in Python are the different formats in which Python stores data. Some Python data types are tuples, floats, strings, and lists. Each data type has it's own rules and uses and can store different data. Data types are…
The Python CSV Module: Step-By-Step Guide
The Python CSV module is used to handle CSV files. CSV files can hold a lot of information, and the CSV module lets Python read and write to CSV files with the reader() and writer() functions. Reading, writing, and manipulating…
Python Collections: A Step-By-Step Guide
Python has four data collection types: lists, tuples, sets, and dictionaries. The collections Python module provides additional options, including namedtuple, Counter, defaultdict, and ChainMap. Python offers four collection data types: lists, tuples, sets, and dictionaries. Each of these data types…
A Step-By-Step Guide to Len Python
The len() Python method returns the length of a list, string, dictionary, or any other iterable data format in Python. The len() method takes one argument: an iterable object. len() is a built-in method in Python. When programming, you may…
How to Use Python Any and All: A Step-By-Step Guide
The Python any() and all() functions evaluate the items in a list to see which are true. The any() method returns true if any of the list items are true, and the all() function returns true if all the list…
Python isinstance: A Step-By-Step Guide
The isinstance() function in Python returns true or false if a variable matches a specified data type. The syntax for isinstance() in Python is isinstance(variable_to_check, data_type). Checking the data type of a particular value is a common operation in programming.…
Python Stack: A How-to Guide
Stacks are an important data structure with a wide range of uses. In programming, stacks allow you to store data in a last-in, first-out (LIFO) order. This means that the last item stored in a stack is the first one…
Python Logical Operators
When you’re working with conditional statements, you may want to make more than one comparison in the statement. For instance, you may want to check if two statements evaluate to True, or if one of two statements evaluate to False.…
How to Use Python range()
When you’re coding in Python, you may want to generate a sequence of numbers within a given range. This is a common need when you are creating a for loop, as the number of values in the specified sequence determines…
Guide to Python Global and Local Variables
A variable is an important and ubiquitous concept in programming. Variables are containers for storing data. Variables can store many types of data, including usernames, email addresses, and items in a user’s online game inventory. When programming in Python, you…
Python Dictionary Update
Updating the contents of a dictionary is a common operation when working with dictionaries. For instance, suppose you have a dictionary that stores a list of car prices. If you want to apply a discount to one of the cars…
Python Join: A Guide
When you’re working with lists in Python, you may decide that you want to merge the contents of a list into a string. For instance, you may want to merge a list of all employee names in a business into…
A Step-By-Step Guide to JavaScript Let
Let in JavaScript is one of three ways to declare a variable. JavaScript let is used to declare block scope variables and cannot be reassigned or redeclared. The let variable is best used for loops. Variables are an essential part…
JavaScript indexOf: A Step-By-Step Guide
The JavaScript indexOf() method returns the position of an item in a list or a substring in a string. The indexOf() JavaScript method returns -1 if a specified value does not appear in a list or string. Only the index…
