Either Disjoint Or Union Types
Many languages support union types, and it is high time Scala did. Union types are coming in upcoming version of Scala - Dotty. Union types (|) are already being compared with Either and Option (disjoint unions).…
Know Thy Option
Avoid `.get` at all costs. Forget there is even an `Option.get`. There is always a way out - better one. Same applies to `.head`. Likewise, consider extending your test classes from `OptionValues`.…
Patterns for Saner Mocking
It is common to see mocks being setup this way in unit tests. scenario("Test Case 1") { ... when(addressResolutionService.resolve(...)).thenReturn(...) when(vendorInventoryService.checkInventory(...)).thenReturn(...) ... .... another bunch of when and then returns when(shipmentService.schedule(...)).thenReturn(...) ...thisIsTheActualCalltoTest(...) verify(vendorInventoryService, 1).checkInventory(...) ... other such verifications } scenario("Test Case…
Cyrilex - Online Regex Tester
A while ago, I wrote the online regex tools. Cyril (@CyrilBois) came across that post and mentioned about his regex tester tool. I think every tool should have a name; not one that just goes by its function but a nickname, if you will. So, I am going to name…
Non-FP to FP Conversion Caveat
Sometimes you learn the best from others; by watching. This post is based on such an instance. A fellow engineer on my team was investigating a nagging issue - partially-successful operations or rather operations that left data in an inconsistent state. It goes without saying that I take no credit…
Go away node/npm
If you haven't found a use for this script that uninstalls the second largest junk in the world next to Mac/iOS updates, you are either lazy or scared of breaking things. I am neither, so I polished this script from the different versions you will find on the internet.…
A Rambling on Error Handling
In the early years, software applications were tiny, compared to what we build today. In any given application, one could say, there were only a handful of error scenarios to deal with. Besides, error reporting, if not error handling, lacked finesse. Just slap the user with something red enough, and…
JS Programming in C# - Immutability
Enough! JavaScript had us in its grip for long with its foot guns. The first time I heard the term Hoisting, I had no idea about it and misheard as hosting. You declare variables using var happily, and you have to come to peace with yourself that it is okay…