design-patterns – Page 5 – Türker Yıldırım

A readonly class with a wither, one release from clone-with

NoteFebruary 28, 20242 min read

8.3 relaxed __clone and did nothing for the case everybody has, which is a wither on a readonly class. The spread of get_object_vars into named arguments contains the…

The migration Rector wrote and we rewrote

Deep diveFebruary 7, 202410 min read

An automated refactor across 412 files, a diff of 8,000 lines, and three wrong hunks in it. The review nobody could actually do.

Block hooks, and the plugin that inserts itself

Deep diveDecember 21, 202310 min read

6.4 in November, and a plugin that can insert a block without editing a template. Install instructions that said “now edit your footer”.

An anti-corruption layer for a supplier that renames fields

NoteDecember 20, 20232 min read

A supplier who renamed four response fields in a patch release, twice in two years, with the second one costing an afternoon instead of a week. The null-coalescing…

A fixture builder instead of a fixture file

NoteDecember 19, 20231 min read

A JSON fixture of a full order, loaded by 40 tests, where each test cared about two fields and was coupled to the other thirty. The fixture file…

Typed class constants, and the interface that had been lying

Deep diveDecember 7, 202310 min read

8.3 on 23 November, and a constant can finally declare a type. An interface constant documented as a string, implemented as an int in one class.

readonly and clone, still awkward in 8.3

NoteDecember 6, 20232 min read

8.3 relaxed one readonly restriction and not the one everybody wants, so a wither is still a constructor call. The __clone relaxation is narrower than it first reads:…

The method that stopped overriding anything in 2019

Deep diveDecember 5, 202310 min read

#[Override] in 8.3, and what it asserts. A subclass method dead since a parent rename four years ago, with a bug report closed as not reproducible.

The interface with one implementation, and when that is fine

Deep diveNovember 16, 202310 min read

140 interfaces, 128 of them with exactly one implementation, and a jump-to-definition that always lands on the wrong file.

A specification object, and when the indirection pays

NoteSeptember 23, 20232 min read

A rule about which orders are eligible for a discount, expressed three times: in a query, in a validation check and in a report. The two methods must…