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@nickrusso42518 www.njrusmc.net
NETWORK ENGINEER
Getting Started with Software Development for Cisco DevNet LEARNING - - PowerPoint PPT Presentation
Getting Started with Software Development for Cisco DevNet LEARNING - - PowerPoint PPT Presentation
Getting Started with Software Development for Cisco DevNet LEARNING THE FOUNDATIONS OF SOFTWARE DESIGN Nick Russo NETWORK ENGINEER @nickrusso42518 www.njrusmc.net Should I be here? Agenda Core skills: Bash Basic software design skills
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Real-life IT experience Ability to comprehend unfamiliar code Basic Python programming
Basic Skills You Should Have
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Pluralsight has deep-dive courses on almost every topic here!
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Your Role at Globomantics
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Demo
First things first: the Bash shell
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Waterfall Development Strategy
Get requirements Design Implement Test Deliver Time
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Advantages
Works well when requirements don't change Clearly defined stages Easy to manage
Disadvantages
Cannot adapt to change Hard to "go back and fix" Testing only at the end
Waterfall Advantages and Disadvantages
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Agile Development Strategy - Scrum
Implement Delivery Test Reqts Design Sprint Time Implement Delivery Test Reqts Design Sprint next sprint
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Advantages
Delivers software (value) faster Fosters teamwork and skill sharing Little planning required
Disadvantages
Requires customer interaction Not many docs; people dependency Requires a competent team leader
Agile Advantages and Disadvantages
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Lean Development Strategy – Kanban
Backlog In Process (max = 2) Completed Bug 2 Bug 1 New feature 4 New feature 2 New feature 1 Bug 3 New feature 3 New feature 2
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Advantages
Minimal batch size Task-oriented; no roles Fastest delivery
Disadvantages
Requires discipline Need sensible WIP limits Encourages recklessness
Lean Advantages and Disadvantages
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Usage of design patterns Error checking Functional decomposition
Pillars of Good Coding
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A generic and reusable solution that solves a recurring problem in software development. It is a blueprint for a strong code project and often satisfies specific project requirements.
Design Pattern
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Detour: Object-oriented Programming (OOP)
class Customer string name integer balance method print_stats() cust_a = new Customer() cust_a.name = "John" cust_a.balance = 14 cust_a.print_stats() class instantiates object
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virtualenv: create separation between Python projects pip: Python package manager pypi.org
Making Life Easier with pip and virtualenv
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Demo
Getting set up for CRM prototyping
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The Observer Design Pattern
Subjects Observers method notify(): for each observer:
- bserver.update()
method update(): do green actions method update(): do blue actions subject.register(observer) subject.unregister(observer) (Publishers) (Subscribers)
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Demo
Observer pattern: balances are past due!
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The Model View Controller (MVC) Pattern
Model View Controller (Model) (Template) (View) model.write() model.read() view.get() view.display()
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Demo
An MVC-based CRM app using Flask
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