PHP Internals News: Episode 89: Partial Function Applications
In this episode of "PHP Internals News" I chat with Larry Garfield (Twitter) and Joe Watkins (Twitter, GitHub, Blog about the "Partial Function Applications" RFC.
The RSS feed for this podcast is https://derickrethans.nl/feed-phpinternalsnews.xml, you can download this episode's MP3 file, and it's available on Spotify and iTunes. There is a dedicated website: https://phpinternals.news
Transcript
- Derick Rethans 0:14
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Hi, I'm Derick. Welcome to PHP internals news, a podcast dedicated to explaining the latest developments in the PHP language. This is Episode 89. Today I'm talking with Larry Garfield and Joe Watkins about a partial function application RFC that they're proposing with Paul Crevela and Levi Morrison. Larry, would you please introduce yourself?
- Larry Garfield 0:36
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Hello World. I'm Larry Garfield or Crell on most social medias. I'm a staff engineer for Typo3 the CMS. And I've been getting more involved in internals these days, mostly as a general nudge and project manager.
- Derick Rethans 0:52
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And hello, Joe, would you please introduce yourself as well?
- Joe Watkins 0:55
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Hi, I'm Joe, or Krakjoe, I do various PHP stuff. That's all there is to say about that really.
- Derick Rethans 1:02
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I think you do quite a bit more than just a little bit. In any case, I think for this RFC, you, you wrote the implementation of it, whereas Larry, as he said, did some of the project management, I'm sure there's more to it than I've just paraphrased in a single sentence. But can one of you explain in one sentence, or if you must, maybe two or three, what partial function applications, or I hope for short, partials are?
- Larry Garfield 1:27
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Partial function application, in the broadest sense, is taking a function that has some number of parameters, and making a new function that pre fills some of those parameters. So if you have a function that takes four parameters, or four arguments, you can produce a new function that takes two arguments. And those other two you've already provided a value for in advance.
- Derick Rethans 1:54
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Okay, I feel we'll get into the details in a moment. But what are its main benefits of doing this? What would you use this for?
- Larry Garfield 2:01
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Oh, there's a couple
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