About DevEquiv

You know what a function does in one language. You need the same thing in another, right now, and the official docs for both are happy to explain themselves at length without ever mentioning each other. DevEquiv exists to close that gap.

How the converters work

Each one is a small typed engine with a test suite. Date formats, function equivalents, SQL crosswalks, cron dialects: all of them map tokens through code that has been checked against the published specification, so the same input always produces the same output. No language model sits in the middle inventing a plausible answer at request time.

Sometimes there is no answer to give. PHP has format tokens that Python has never had; Quartz cron carries a seconds field that Unix cron cannot express. When that happens the converter tells you which part it dropped and why, because a silent approximation is the kind of bug you find in production three weeks later.

Closest is not always idiomatic

The API that mirrors another language's behaviour most exactly is often not the one an experienced developer in that language would reach for. Both matter, and they matter for different reasons, so where the distinction is real the page shows you the close equivalent and the idiomatic version side by side. Pick whichever fits the code you are writing.

How pages get written

Engine first, prose second. The explanation describes what the tested code actually does, which keeps the two from drifting apart over time. Before a page ships it has to clear an automated gate: a summary, at least two worked examples, real references, a review date, and a compatibility note wherever the match is imperfect. A similarity check catches pages that have drifted too close to one another.

When something is wrong

Every page names its sources and the date its mappings were last verified. Languages move, specs get revised, and some of this will go stale. If you spot something broken or out of date, tell us and we will fix it.