Canary Release

Screening your software to ensure it's ready for prime time.

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DevOps

Software Delivery
with Containers

Imagine deploying and running your applications and services in an environment that is fully-automated, self-healing, and scaled based on incoming demand, in the blink of an eye, on a footprint smaller than any virtual machine (VM) on the market.  Technology companies, such as Google, have been doing this for well over a decade.  This platform is called a container and it is the biggest revolution in DevOps to date.

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DevOps

Quantifying Software Quality

As software development teams look for ways to improve their products and services, they often look at improving time to market, better prediction of release schedules, improving customer satisfaction, and raising overall software quality.  Software “quality” can mean a lot of things to different people.  But quality goes way beyond how well a product functions or how many bugs it contains.

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DevOps

Managing Technical Debt

The manner in which technical debt is managed can give a company a competitive advantage when it’s most needed or destroy a well conceived product.  When incurred properly, technical debt can greatly decrease time to market, providing a short-term advantage over the competition.  But if that debt is not paid off quickly, it will slowly, yet surely, erode the quality and the value of your software.

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assistant Development Tip

Single Responsibility Principle

Build classes and modules which have only one responsibility, with only one reason to change.  Design each as a group of functions with the responsibility of servicing a single actor (one user fulfilling a particular role).  This will help achieve separation of concerns, promote a loosely-coupled architecture, and prepare for migration into containers and on to the cloud.

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Dead Code

Maintain a healthy code base by continually pruning away dead code.  Significant time is often wasted in attempts to understand code that never gets executed — to understand why changing the code never seems to affect the outcome.  With modern version control systems, deleting unused code should never be a second thought.  Add a commit message explaining the dead code and remove it.  And don’t just comment it out — keep your code base as small as possible.

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assistant Development Tip

Test Overlap

Minimize the number of tests that depend on a particular piece of functionality such that each test condition is covered by exactly one test.  Tests that verify the same functionality will usually fail at the same time and require the same maintenance when the functionality is modified.  Give attention to tests that verify the same code in different ways as these may indicate different test conditions.  Avoid Eager Tests that verify too many test conditions.  Picking the right tests is essential in employing a risk-based approach to testing.

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school Training

Managing Technical Debt

To maintain business, market, and technological advantages, you must effectively manage technical debt incurred within all artifacts that define, implement, and validate your software.  This course examines what technical debt is, how it can benefit your organization and give you an advantage over your competition, how and when it should be (intentionally) incurred, and how and when it should be paid off.

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computer Code Kata

Prime Transformation

A good TDD developer is one who can apply transformations well.  What are transformations?  They are the opposite of refactoring.  While refactoring is changing the structure of code without changing its behavior, transformations are changes to code that generalize behavior without changing its structure.  In this kata, you will create a function to calculate the prime factors of a given integer using TDD while applying transformations to pass the tests.

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school Training

Principles & Practices of Test-Driven Development

This course teaches the principles and practices of Test-Driven Development (TDD) and demonstrates how proper software design evolves through application of the eXtreme Programming principle of Test First.  Unit testing principles are introduced, along with a thorough discussion on the benefits of TDD.  An application is developed (from start to finish) during this course to explain step-by-step and demonstrate first-hand how a high quality, testable design evolves by applying the three laws of Test-Driven Development.

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Doug Klugh

Software Craftsman

Software Development and DevOps Leader, Microsoft developer, and Agile Coach.

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