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James Gallagher

Technical Content Manager

James Gallagher is a self-taught programmer and the technical content manager at Career Karma. He has experience in range of programming languages and extensive expertise in Python, HTML, CSS, and JavaScript. James has written hundreds of programming tutorials, and he frequently contributes to publications like Codecademy, Treehouse, Repl.it, Afrotech, and others. He also serves as a researcher at Career Karma, publishing comprehensive reports on the bootcamp market.

Career Karma 2021 Bootcamp Preferences Survey
Over the last decade, bootcamps have become an increasingly popular way of acquiring tech job skills. In our latest report on the state of the bootcamp market, we noted that over 44,000 people attended or graduated from a bootcamp in…
How Outschool is Disrupting K-12 Education
While the internet has fundamentally changed many different parts of our lives—from how we shop to how we communicate—the education system has not been impacted too much by these changes. Indeed, many classrooms rely on old technological infrastructure, and teach…
Most Popular Learn to Code Resources by Career Karma + Replit
Learning to code is a gateway to many new tech opportunities. At Career Karma and Replit, we see every day how learning to code can transform lives and open up new career paths. Given the popularity of learning to code,…
Most Popular Web Development Frameworks in 2021
A common question all web developers ask is: "What is the most popular web development framework?" We have done the hard work of analyzing the data and formulating an answer below. We have broken down the top front end and…
The Most Popular Programming Languages
Knowing a programming language is essential for many high-tech jobs, such as those in the fields of data science and software engineering. A question people often ask when considering a new career that involves technology is "which programming language(s) should…
Top Bootcamp Rankings: First Quarter 2021
Bootcamps are an increasingly popular method of learning the skills one needs to pursue a tech job. In fact, over 40,000 people attended a bootcamp in 2020 alone, according to our most recent State of the Bootcamp Market study. Bootcamps…
Bootcamps vs. Certifications: Compared and Contrasted
Attending a professional training program is an excellent way to build skills in a technical role such as UX/UI designer or software engineer. Under the guidance of a professional, you will learn the theory, practical knowledge, and best practices that…
The Ultimate Guide to Coding Bootcamp Loans
Joining a coding bootcamp is a good way to build in-demand technology skills that are likely to lead to a job in the future. However, like college, coding bootcamps are largely not free. According to our 2021 coding bootcamp market…
State of the Bootcamp Market Report 2021
Last year, we published our State of the Bootcamp Market 2020 report, a retrospective on the bootcamp space over the last decade. In 2019, the coding bootcamp market grew 4.38%, and we estimated 33,959 people attended and graduated from a…
Python ‘numpy.ndarray’ object is not callable Solution
Like any regular Python array, you can access the contents of a NumPy array using indexing. The indexing method, which uses square brackets, lets you see one item in a list or a particular part of a list. If you…
What is Pseudocode?
Developers usually do not start writing code immediately after a big assignment. The issue with this approach is that the developer will have to think about how they go about completing the assignment as they go. In many cases, it…
Python Convert List to String: A How-To Guide
Suppose you are building an application that shows the grades a student has earned on a test. These grades are stored in a list but you want to present them as a string. How would you go about doing that?…
Python AttributeError: ‘numpy.ndarray’ object has no attribute ‘append’ Solution
In regular Python, you can use the append() method to add an item to the end of a list. You cannot use this method in NumPy. If you try to use the Python append() method to add an item to…
Git fatal: remote origin already exists Solution
The “origin” keyword is commonly used to describe the central source of a Git repository. If you try to add a remote called “origin” that already exists, you will encounter the “fatal: remote origin already exists” error. In this guide,…
Python Copy File: A How to Guide
You may need to copy a file in a number of programs. Imagine if you wanted to build a logging function for your program that begins with a predefined set of text. You could create a copy of an existing…
Python ValueError: math domain error Solution
In mathematics, there are operations which do not work on negative numbers or zero numbers. Consider the square root, for example. You cannot find the square root of a negative number. Python recognizes that not all operations work with negative…
Python ValueError: list.remove(x): x not in list Solution
You cannot remove an item from a list if it does not appear in said list. The Python error ValueError: list.remove(x): x not in list tells you the item you want to remove does not appear in the list. In this…
Bash permission denied Explanation and Solution
Files on an operating system usually have permissions, making the file accessible to a limited range of people. For instance, some files on a computer are accessible only to administrators; other files are only accessible to a particular user. If…
Python JSONDecodeError Explanation and Solution
Many developers store data from a program in a JSON file; other programs reference APIs which require working with JSON. Indeed, you will have no trouble finding a use case for JSON, or its Python equivalent, dictionaries. You may encounter…
Python FileNotFoundError: [Errno 2] No such file or directory Solution
In most cases, any file you reference in a Python program needs to exist. This is, of course, unless you are creating a new file and writing to it. If you reference a file that does not exist, Python will…

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