Category Archives: Week-15

Sequence diagram dissection

Along with class diagrams is the topic of a sequence diagram (mentioned in previous blogs). Sequence diagrams are a good way to understand the flow of a program that helps developers when it comes to creating and testing their products.

This blog will go into detail of how to read a sequence diagram and show why they are important.

To start here is the example given from a class activity and the previous blog:

As an overview this is the sequence diagram for a program that creates a student and a day. Courses and appointments are assigned to a student, working as a mock schedule creator. The student has a name, phone number and an email address. Days are a collection of courses and events. The courses have a start time, end time, course code and room number. The appointments have a start time, end time and description. Displaying the day shows all of the assigned courses and events.

With the overview we can look into how all of that information is extracted using just the sequence diagram. Ideally you would want a class diagram as well in order to write the program initially but the sequence diagram also helps explain the flow and give an idea of what should be tested.

Starting from the top we have a user, that being the driver class that someone is using to run the program. We begin with creating 2 days and two courses. The courses variables are listed above the line leading to the order of their creation. Next a student is created. This student is named sam and the associated variables are listed in a similar manner. An appointment is created in a similar manner as the courses.

All of the created courses and events are then added to the list of events. A new course is created and added to the events. Then comes the “testing” portion. By displaying the days you should get outputs that show all of the events. After removing the created appointment and displaying the day again you should see it has been removed.

All of this shows the actual behavior a program should have. Along with giving samples of inputs that can be used to test that the program is working as intended.

Below is the code written to match the sequence diagram:

As one can most likely see. The code itself follows the diagram almost perfectly. The main differences are just the syntax and the way certain aspects are implemented. It’s important to check over the class diagram and code itself to know how to properly implement the sequence diagram.

The power of a sequence diagram is that it gives a developer a basic example of a program’s expected behaviors. For actual proper testing you would want to implement more things that wont be discussed here. However it is a strong stepping stone leading towards that.

From the blog Mikes CS 343 by Michael St. Germain and used with permission of the author. All other rights reserved by the author.

The important of code visibility and how to maintain it

From the blog CS@Worcester – My first blog by Michael and used with permission of the author. All other rights reserved by the author.

GIT(ting) My Friend A Promotion

For teams of developers having a centralized repository for code is essential. Git provides an extremely powerful and relatively user-friendly base for teams to collaborate effectively.

After teaching one of my close friends, involved in a development project at work, the basics of class diagrams. They gave her a more hands-on role with the entire development process. Even though she had never worked with programming before, having someone in a business oriented role who could communicate and check over the team of developers was perfect for them.

That’s when she was selected as the product owner for her company’s new website. In a serendipitous twist they were using git as their repository while I simultaneously was being taught about it in school.

The next step was to teach her a basic overview of how it all looks from a developers perspective.

We started with a picture from my professor.

At first glance, I had completely lost her. After explaining that she wasn’t the maintainer responsible for handling all of this her mind was eased a little. The main ideas were just to understand the flow of how the developers were going to be working. All she had to remember was FCBPP.

This acronym I created for her was simple. They would FORK their own copies. Make CLONES of that. Make a BRANCH where they would do their work. PUSH that work kind of like a save. Then create a PULL request. As a developer it is obviously a lot more nuanced and there are more steps involved. But for someone that isn’t actually doing hands on work that was enough.

After getting the gist of it and before getting further into the details of how it would benefit her to know that stuff. We took a look at the stuff she would really be involved with. The product and sprint backlogs.

In git it is actually fairly easy for someone who doesn’t really understand programming itself to look at, arrange and audit backlog items. It would also allow her to check in regularly to see where the team was when her boss would ask questions.

In the real life case while explaining this part we did use the real github of her company but for the sake of confidentiality it will be a new blank project.

I told her to focus on the issue board under planning. It looked similar to this:

With properly labeled boxes and the lists of items and features the team was working on or planned to work on she felt so much more comfortable asking about things and helping plan everything out. After circling around the topic a few more times we realized just how powerful having a product owner who knows this process could be

We also joked with her boss that with me teaching her these things I should be hired as a consultant (small business unfortunately) with a bonus for my professor.

From the blog Mikes CS 348 by Michael St. Germain and used with permission of the author. All other rights reserved by the author.

The role of individual contributors in the development process

From the blog CS@Worcester – My first blog by Michael and used with permission of the author. All other rights reserved by the author.

 coding understandable program

For anyone who codes a  program, it is important to not just have a working program, but to have  a  program  that is   easy to understand, whether you publish your program onto github, or you want to  review  your program after finishing it. Clean code is a term that was first introduced by Robert Cecil Martin, also known as Uncle Bob. He wrote a book that gives best practices and tips for writing understandable and working code. 

When creating formulas for writing code, instead of including numbers in a formula, which could lead to confusion for  a number’s purpose in   a calculation. Creating   a variable that explains it’s purpose in a code makes calculation clear. Comments can explain the meaning of a statement in a  code,  and while comments can  attempt to clear up any confusion for anyone viewing code, it should not be used to explain a obvious statement, but to explain certain actions  in code. For constructing functions, it’s best to have a function perform one action, and if a function is very lengthy, a function should be broken down into multiple functions. 

When writing code with multiple nested if else conditions,  to  make a program easier to understand,  if else conditions should be split  into descriptive functions. As someone who has worked with different programming languages, I would want to use the practices of clean code, to write a working program that I can review and understand if i revisit my work.

What Is Clean Code? A Guide to Principles and Best Practices

From the blog CS@Worcester – jonathan's computer journey by Jonathan Mujjumbi and used with permission of the author. All other rights reserved by the author.

The Modern Standard for Collaboration: Version Control

Introduction

Version control is important for modern software development, enabling teams to collaborate effectively, manage changes, and maintain code quality. The blog post “Version Control Best Practices” by Tobias Günther offers 10 tips on how to use version control systems (VCS) like Git more efficiently.

Summary

The blog outlines essential best practices for working with version control systems, focusing on enhancing productivity and reducing errors. There were ten points but here are the top 5 most important in my opinion:

  1. Use Branches: Branches allow developers to isolate changes, experiment, and test without impacting the main codebase.
  2. Commit Often: Regularly committing small changes ensures incremental progress and simplifies debugging.
  3. Write Good Commit Messages: Clear, detailed commit messages help team members understand the context and purpose of changes.
  4. Go Beyond the Basics: Developers should invest time in learning advanced Git features like interactive rebases and cherry-picking to enhance their workflows.
  5. Don’t Commit Half-Done Work: Each commit should represent a complete, functional unit to maintain repository stability and clarity.

Why I Chose This Blog

I chose this blog because version control is a fundamental skill for software development, yet its nuances are often overlooked in coursework. While I’ve used Git for assignments, I realized that my approach lacked the deeper understanding laid out in this blog.

Reflection

There was a big emphasis on commits, which makes sense as commits are an integral part of version control and most of the tips talked about in the blog are practices that I do regularly, such as writing good commit messages. I don’t think it’s particularly hard to understand these standards for version control, and once you know them it’s just the norm to follow them.

Branching was something that I hadn’t known about prior to learning about it in class, but it makes sense to separate each new feature into its own area to work on instead of putting everything in main. This “tip” is really just a necessary way to stay organized and keep the repository and its pull requests in order.

Going beyond the basic features of git like committing and pushing is also a great tip, because although you could navigate git with only the basics, learning the more advanced features like rebasing can help greatly in certain situation where you’d be happy you know how to do it.

Future Application

There were some takeaways from this blog that I could incorporate into my own workflow. I think that I should commit more often than I do. I tend to forget to commit and only do so when I stop working but by then there could be a few features that are all crammed into one big commit. 

Citation

Version Control Best Practices by Tobias Günther

https://www.git-tower.com/blog/version-control-best-practices/#8-agree-on-a-workflow

From the blog CS@Worcester – The Science of Computation by Adam Jacher and used with permission of the author. All other rights reserved by the author.

An Efficient Way to Work: Software Frameworks

Intro

Frameworks play a pivotal role in streamlining software workflow. The blog post “Top 50+ Software Development Frameworks“ by Trung Tran provides an insightful overview of the purpose, types, and benefits of frameworks, making it an excellent resource for anyone involved in the software development world.

Summary of Source

The blog explains the concept of software development frameworks as pre-built tools and libraries that provide a structure for developing applications. It highlights the following key points:

  1. What is a Software Development Framework: A framework is a pre-designed structure of reusable components and tools that streamlines the software development process.
  2. Advantages of Using a Software Framework: Frameworks enhance efficiency, improve code quality, simplify maintenance, and enable faster development cycles.
  3. Disadvantages of Using a Software Framework: Potential drawbacks include steep learning curves, limited customization, and dependency on the framework’s updates and support.
  4. How to Choose a Suitable Development Framework: Developers should consider project requirements, scalability, compatibility, and their team’s expertise when selecting a framework.
  5. 50+ Popular Software Development Frameworks: The blog lists widely used frameworks like Angular, React, Django, Spring, and Flutter, categorizing them based on application types.

Reason For Choosing This Source

As someone learning to build efficient and maintainable software, understanding frameworks is fundamental. This resource breaks down everything needed to know about frameworks before jumping into using them, even listing the top 50 is really useful to see for any project anyone may do.

Reflection

Prior to this blog I didn’t really have a strong understanding of what a framework for software development was. I had heard of popular ones like ruby on rails or spring for java, but I wasn’t sure what it really meant. Reading through this blog, I now feel I have a solid grasp on what they are, and how to choose one. On the topic of choosing one, there aren’t any that are one size fits all that will always be the perfect one to use, and it more depends on the project being worked on and the team behind it. I know frameworks are popular so I hadn’t considered some the disadvantages listed in the blog like the limited customization, where it might feel like you have less control of what your program does because you’re using this outline and can’t mold it as much as you may want to. A lot of times those disadvantages are overshadowed by the positives which is why they’re so often used.

Future Application

I’ve learned that frameworks are a really powerful tool that save a lot of time and help create efficient work, so I’ll make sure to study which framework is best for me to use in the future when working on projects. This blog post also helped me understand the limitations of them so I also know what to look out for in terms of drawbacks for whichever framework I might use.

Citation

Top 50+ Software Development Frameworks by Trung Tran https://www.orientsoftware.com/blog/software-development-frameworks/

From the blog CS@Worcester – The Science of Computation by Adam Jacher and used with permission of the author. All other rights reserved by the author.

How to review code effectively: A GitHub staff engineer’s philosophy

For my final blog post for the semester, I wanted to pick a topic that was different from project management, since I had already written about that a few times. Since our most recent topic in class revolved around GitHub and git commands, I wanted to explore a blog post that aligned with that topic. I came across a blogpost by GitHub staff engineer Sarah Vessels, from the github.blog page, about code review.

In this article, code reviewer Sarah Vessels discusses some practices to help improve code reviewing and make it more useful and efficient for everyone involved. She advises constantly checking your GitHub notifications inbox, anytime you have a spare moment. She also recommends using GitHub Slack Integration. Certain queries can help filter a slack group for finding outstanding pull requests that need review. We used Discord for our class instead of Slack, but as I understand it, Slack is more common in the professional world. I believe Discord has equivalent queries that can be used, anyway. The next piece of advice she gives is to use reviewer teams to manage notifications. While catch-all code owner teams can be okay as a fallback, it’s better to keep the number of code owner teams your own small, so that anything you get pinged for or anything that shows up in your inbox feels relevant to you, and not just something to ignore.

The next part she discusses, which I feel is the most important advice, revolves around giving good, constructive code review that doesn’t across as lazy. Good code review focuses on specifically saying,” I have a problem with this, maybe you should try xyz instead” instead of saying “I don’t like this” or “This won’t work” and leaving it at that. It’s good to ask questions, because the person who authored a pull request has more context for their changes, and gives them a space to explain and justify their reasonings. Personal preferences are fine, but approval should be about the overall integrity of the code. If the changes won’t break anything or affect production, leave the feedback with a comment but still approve the pull request anyway to keep the process moving. This is something I personally appreciate from the author, because while I don’t mind receiving feedback and improving my part of the process, I hate the feeling of holding back the overall process. This allows opportunities to open discussion without causing a holdup.

She has a few other suggestions in her blogpost, like being gracious and using draft pull requests, but I believe the most important things are her advice about the giving good feedback and managing notifications so you feel compelled to give every notification your full attention. I don’t know how much code I’ll be reviewing in the near future, but if I’m ever in this situation, on either side, this is good advice for me to keep in mind and remember.

Link: https://github.blog/developer-skills/github/how-to-review-code-effectively-a-github-staff-engineers-philosophy/

From the blog CS@Worcester – Justin Lam’s Portfolio by CS@Worcester – Justin Lam’s Portfolio and used with permission of the author. All other rights reserved by the author.

scrum

Scrum is a framework that teams use to organize themselves in a project to reach a common goal. The values that members of a scrum team value are commitment, courage, focus, openness, respect. Scrum team is open to new ideas and opportunities, respecting each other, and have patience for the scrum process, and focusing on time-consumed tasks, and finding space for improvement. 

Scrum deliver a product for customer in a time period called a sprint. Product Backlog is the to-do list for a team which contains the requirements for a project. Product owner, which is one of the scrum roles, is responsible for maintaining and adding updates for the list, removing and adding new requests from customers. Sprint backlog is lists of items from the product backlog that is worked on during the current sprint. Increment is the end product of a sprint. 

The product owner guides the team on the next steps in the scrum process and ensures that the team understands the requirements that a business or client wants. The Scrum leader is responsible for making sure the scrum team works effectively. When working in a scrum team, there are different types of events that the scrum team is involved in.  Sprint planning is when teams estimate how much work needs to be done in a sprint. Daily Scrum is a short meeting where team members plan for the day, and provide updates on challenges experienced, and what work has been done. Sprint Review is the period at the end of the sprint, where the team reviews the work that has been completed, and presents it to stakeholders. Sprint Retrospective is when a team comes together to discuss the sprint result and make adjustments for future scrums. 

This semester in  CS 348, I had learned about scrum. With learning scrum, I was able to see how software team deliver products for clients. 

What is Scrum? – Scrum Methodology Explained – AWS

From the blog CS@Worcester – jonathan's computer journey by Jonathan Mujjumbi and used with permission of the author. All other rights reserved by the author.

Agile: What is it and why do some people not believe in it anymore?

This article is a beginning-to-end write up of the Agile methodology by Miriam Posner, an Assistant Professor at UCLA. She starts with a pov of someone watching an agile team in action, complete with all the user stories, story points, stand ups, a whiteboard, post-it notes, and sprints. For those who have not been introduced to this software development process, ‘stories’ are descriptions of features with ‘points’ showing the difficulty of implementing said features. ‘Stand ups’ are start-of-the-day meetings done standing up for quickness, the whiteboard is to organize each story point, represented by post-it notes, into the stages of ‘in-progress’, ‘done’, ‘backlog’, etc. ‘Sprints are just quick two week long work periods that help to break down the project into digestible chunks.

While this might seem rather much from to some people, others might have an opinion closer to Miriam, who found it to be efficient and intriguing. As such she researched the origins of Agile and learned the complicated history of managers and software developers. I will try to keep this summary brief while hitting all the major points.

Miriam starts with the buildup to Agile. It started in the 50’s and 60’s, most ‘experts’ said building the computer was the hard part and programming it would be trivial. The sheer enormity of their incorrectness led to a push in the field to adopt the name (and stricter processes) of engineering, leading to the coining of the term ‘software engineering’. The idea was that by following engineering techniques the experts would “transform the arcane and error-prone craft of computer programming to meet the highest standards of the engineering profession.” The next people to step in were the businesses who looked to hire these new ‘software engineers’. They created a framework of control where one person defines the project and breaks it up into steps, which are in turn handed to engineers to build and test before moving on to the next step. This was derogatorily called the “waterfall” method, so of course upper management took the name and method and ran with it. This method started to fail due again to people who were not programmers believing they knew what programming entailed. The main problem was that whenever any issue came up in the code, every step needed to be redone which meant the timeline would be increasingly muddled.

Next came Agile, created by “17 middle-aged white guys dressed in khakis and dad jeans” in the Agile Manifesto. In their words:
We are uncovering better ways of developing software by doing it and helping others do it.

Through this work we have come to value:

Individuals and interactions over processes and tools

Working software over comprehensive documentation

Customer collaboration over contract negotiation

Responding to change over following a plan

That is, while there is value in the items on the right, we value the items on the left more.

I would like to continue this dive but I am out of words.

Have a good day.

Link:
https://logicmag.io/clouds/agile-and-the-long-crisis-of-software/

From the blog CS@Worcester – Coder's First Steps by amoulton2 and used with permission of the author. All other rights reserved by the author.