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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 and income share agreements.

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…

Coding Bootcamp Loans: A Complete Guide

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…

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