Check out my new course Learn you some Lambda best practice for great good! and learn the best practices for performance, cost, security, resilience, observability and scalability.
The other day I had an interesting observation on the optional parameters in C# 4, whereby if you specify a parameter as optional on an interface you don’t actually have to make that parameter optional on any implementing class:
Which means you won’t be able to use the implementing class and the interface interchangeably:
Naturally, this bags the question of why the compiler doesn’t enforce the implementation to match the default value specified by the contract?
Luckily, my subsequent question on SO was answered by Eric Lippert from the C# compiler team, not to waste time and effort repeating what’s already been said, check out his answer and it’s clear to see the rationale here and why it would be impractical and inconvenient should the compiler does it differently.
I specialise in rapidly transitioning teams to serverless and building production-ready services on AWS.
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Here is a complete list of all my posts on serverless and AWS Lambda. In the meantime, here are a few of my most popular blog posts.
- Lambda optimization tip – enable HTTP keep-alive
- You are thinking about serverless costs all wrong
- Many faced threats to Serverless security
- We can do better than percentile latencies
- I’m afraid you’re thinking about AWS Lambda cold starts all wrong
- Yubl’s road to Serverless
- AWS Lambda – should you have few monolithic functions or many single-purposed functions?
- AWS Lambda – compare coldstart time with different languages, memory and code sizes
- Guys, we’re doing pagination wrong