JavaScript Copy Array: A Guide
In JavaScript, copying an array is not as simple as using the assignment operator (=) to create a duplicate. If you've ever tried this, you will be surprised to find out that it only creates a link to the original…
Python ‘str’ object does not support item assignment solution
Strings in Python are immutable. This means that they cannot be changed. If you try to change the contents of an existing string, you're liable to find an error that says something like "'str' object does not support item assignment".…
Fibonacci Java: A Guide
A Guide to the Fibonacci Java Algorithm The Fibonacci Sequence is a sequence where the next number is calculated by calculating the sum of the previous two numbers. This sequence has its claim to fame in mathematics. It also appears…
8 Signs That Your Job Interview Went Well
In this guide, we’re going to discuss eight signs an interview went well. These may signal you are going to advance to the next stage of the interview process. “How did I do in my job interview?” is one of…
How to Sort a Dictionary by Value in Python
To sort a dictionary by value in Python you can use the sorted() function. Python’s sorted() function can be used to sort dictionaries by key, which allows for a custom sorting method. sorted() takes three arguments: object, key, and reverse.…
JavaScript Timestamp: A Step-By-Step Guide
To get a JavaScript timestamp format can be achieved using the Date() object, which holds the current time in a readable timestamp format. You can also create new Date() objects with different timestamps, and get the current Unix time using…
Top 15 React JS Interview Questions
React has grown significantly in popularity over the last few years. According to Stack Overflow’s 2019 Developer Survey, which studied the tools and development practices used by over 90,000 programmers, React.js was the second most popular web framework among respondents. …
Java String replace() Method: A Step-By-Step Guide
The Java string replace() method will replace a character or substring with another character or string. The syntax for the replace() method is string_name.replace(old_string, new_string) with old_string being the substring you’d like to replace and new_string being the substring that…
How to Respond to an Interview Request
So, you have just heard back from an employer who is interested in bringing you in for an interview? Congratulations — that’s a big accomplishment! If an employer asks to interview you, it means they think you could be a good fit…
How to Use the SQL INSERT Statement
Have you ever wondered how data is added to a database? Behind every record in a database is an INSERT INTO statement. Without this statement, databases could not store data! In this guide, we’re going to talk about what the…
How to Use the SQL SELECT Statement
Databases do not just store information, they make data easily accessible. With a little help from the SELECT statement, you can retrieve any set of values from a database that you need. In this guide, we’re going to discuss what…
How to Code the Fibonacci Sequence in Python
The Fibonacci Sequence is one of the most famous sequences in mathematics. It’s quite simple to calculate: each number in the sequence is the sum of the previous two numbers. This sequence has found its way into programming. Often, it…
How to Use Python Environment Variables
When you’re developing across different environments, you may want to specify different configuration values for each environment. The computer on which you developed an application will not be the same as the one on which you deploy an application. That’s…
Git Submodules: A Guide
How to Use Git Submodules As a Git repository grows in size, you’ll probably find yourself depending on other repositories. A blog project may depend on another repository that stores the code for a particular theme. A software project may…
JavaScript Booleans: A Guide
How to Use JavaScript Booleans True or false values are everywhere in programming. We call these values Booleans. They can be used to compare two or more values and control what parts of a program should run. In this guide,…
sudo Command: A Guide for Beginners
What is the sudo Command? “Make a sandwich.” No. “Sudo make a sandwich.” Sure. This is a recurring joke in the programming community. This article will help you understand the sudo joke. Sudo is a command that runs any Linux…
Python Factorial: A Guide
How to Calculate a Python Factorial You may remember the word “factorial” from your high school math class. They’re not very easy to calculate without a calculator. Who wants to calculate the factorial of 10 by manually multiplying 1x2x3x4 and…
NumPy Concatenate: A Guide
How to Concatenate NumPy Arrays NumPy is an excellent library for working with arrays in Python. It covers everything from creating to manipulating arrays of all sizes. It’s no surprise then that NumPy comes with a utility that you can…
JavaScript Shift and JavaScript Unshift: A Complete Guide
JavaScript shift() removes an element at a specified position and shifts the remaining elements up. The JavaScript unshift() function does the opposite. unshift() adds a new element at a particular position and shifts the remaining elements down the list. You…
SQL UPDATE: A Guide
How to Use the SQL UPDATE Statement One of the core features of databases is that stored values can be updated. You can change the values of any record in a database at any time. Values inside an SQL database…
How to Use the git rebase Command
One of the beauties of Git is that it allows you to keep an accurate record of how a codebase has evolved. This makes it easy to see what changes have been made to a repository, when they were made,…
If Else in C++: A Step-By-Step Guide
If...else is a conditional statement in C++. The C++ if statement runs a block of code if a condition is met. An if...else statement functions the same way but runs a second block of code if the condition is not…
Git Revert Commit: A Step-By-Step Guide
The git revert command will undo a commit so you can return a repository to the previous commit. Instead of deleting the commit, revert will create a new commit that will reverse the changes of a published commit. This preserves…
Binary Search JavaScript: A Guide
How to Code a Binary Search in JavaScript Searching algorithms makes life so much easier as a programmer. Doing so makes it easy to find a particular item inside a data set of tens, hundreds, or thousands of items. One…
git blame: A Beginner’s Guide
How to Use the git blame Command You may have been told in school never to play the blame game. When you’re working with Git, you can ignore that advice. Using the blame command is an essential part of Git.…
Python Recursion: A Guide
How to Use Python Recursion Python recursion is an intimidating topic for beginners. Let’s dispel the myth that recursion is difficult by defining it. Recursion is a method of programming where a function calls itself. That sounds simple, right? When…
How to Convert a Char to String in Java
To convert a char to a string in Java, the toString() and valueOf() methods are used. The toString() and valueOf() methods are both used to convert any data type to a string. For converting a char to a string, they…
Python Assert Statements: A Step-By-Step Guide
The Python assert keyword tests if a condition is true. If a condition is false, the program will stop with an optional message. Assert statements are used to debug code and handle errors. You should not use an assert statement…
Java String Contains: A Step-By-Step Guide
The Java contains() method checks if a string contains another substring. The contains() method returns either True or False. Java contains() accepts one parameter: the substring to search for in your string. Often, when you’re working with strings, you’ll want…
Python Float: A Step-By-Step Guide
The Python float() method converts a number stored in a string or integer into a floating point number, or a number with a decimal point. Python floats are useful for any function that requires precision, like scientific notation. Programming languages…
