**adt**443

Notes on Data Structures and Programming Techniques (CPSC 223, Spring 2015)

5 weeks ago by ebarbeito

Yale Data Structures with C

programming
adt
curso
c
from twitter_favs
5 weeks ago by ebarbeito

The Algebra of Algebraic Data Types, Part 3 - Chris Taylor

haskell
adt
functional
programming

6 weeks ago by rryan

I gave a talk on this subject at London Haskell in November 2012. A video of the talk is on YouTube and slides are on GitHub. This is Part 3 in a …

6 weeks ago by rryan

The Algebra of Algebraic Data Types, Part 2 - Chris Taylor

haskell
adt
functional
programming

6 weeks ago by rryan

I gave a talk on this subject at London Haskell in November 2012. A video of the talk is on YouTube and slides are on GitHub. This is Part 2 in a …

6 weeks ago by rryan

The Algebra of Algebraic Data Types, Part 1 - Chris Taylor

haskell
adt
functional
programming

6 weeks ago by rryan

I gave a talk on this subject at London Haskell in November 2012. A video of the talk is on YouTube and slides are on GitHub. In this series of posts …

6 weeks ago by rryan

What the Heck are Algebraic Data Types? ( for Programmers )

june 2017 by rcyphers

Some of you may be asking why you should learn Algebraic Data Types and how will they change your world? I am not going to answer that, but suffice it to say that Algebraic Data Types are the underpinning of the type systems to the ML derived languages, Haskell and OCaml included, and their construction and properties allow for the power (and inference) that accompanies these type systems. They are cropping up in other languages, like Scala, F#, and Clojure. Well, here are my 2 cents.

I wrote this blog post because I had trouble learning what an Algebraic Data Type was, and could not find an introduction that did not either 1) leap immediately to copy and pasted phrases, 2) mislead, like make the claim that "algebraic data types are the same thing as discriminated unions" or 3) delve into graduate level formalism. This blog post represents the results of what I have teased from numerous sources.

Algebraic-Data-Types
ADT
I wrote this blog post because I had trouble learning what an Algebraic Data Type was, and could not find an introduction that did not either 1) leap immediately to copy and pasted phrases, 2) mislead, like make the claim that "algebraic data types are the same thing as discriminated unions" or 3) delve into graduate level formalism. This blog post represents the results of what I have teased from numerous sources.

june 2017 by rcyphers

Abstract Data Types, Algebraic Data Types and Algebraic [Data] Structures

june 2017 by rcyphers

Discussing the differences between abstract data types, algebraic data types, and algebraic [data] structures.

Algebraic-Data-Types
ADT
june 2017 by rcyphers

The surest sign you’re winning is when Goliath takes a swing at you • Both Sides

may 2017 by charlesarthur

Mark Suster:

ADT, if you didn't know, is a company that has grown rich on comparatively simple alarm systems, often with subscriptions. Ring threatens to undermine that.

ring
adt
lawsuit
<p>This <a href="https://blog.ring.com/index.php/2017/05/17/why-a-bully-wants-stop-ring-from-making-your-neighborhoods-safer/">Goliath-imposed fight by ADT</a> is particularly annoying for me because Ring is literally my family’s single favorite tech innovation of the past several years. It is a security doorbell (and now floodlight!) where for just $3 / month you can watch all video footage of people who come to the outside of your house including delivery people, solicitors or people in the neighborhood who perhaps shouldn’t be there.

For my family Ring has become a way that we joke and communicate with each other when I’m on the road. The boys or my wife will step in front of the camera on the way to school and if I’m in NY or SF or London my phone rings and I see them waving on their way.

Just how threatened is ADT? Ring is now arguably the fastest growing consumer product in the country and is now in a staggering 1 million homes in America and growing at an unbelievable clip. It is a product that you can purchase an entry-level camera for under $200 and pay just $3/month in video fees in a security industry that was previously only accessible to wealthy families who could afford expensive protection.

Ring is to ADT what the classic Innovator’s Dilemma says disrupts the industry behemoth by offering a product that is significantly cheaper and initially lower in feature set but eventually becomes so pervasive and where functionality grows to a point where the entire market dumps the giant company charging high prices in favor of a younger, more nimble provider whose innovation cannot be matched.

And the giant gets disrupted precisely because its cost structure to serve its customers and its cash cow, high-priced offering makes it nearly impossible for it to try compete.</p>

ADT, if you didn't know, is a company that has grown rich on comparatively simple alarm systems, often with subscriptions. Ring threatens to undermine that.

may 2017 by charlesarthur

ADTs in Typed Racket with macros

april 2017 by rcyphers

Algebraic data types, or ADTs, are a staple of the ML family of functional programming languages. I won’t go into detail here—I want to focus on the implementation—but they’re a very descriptive way of modeling data that encourages designing functions in terms of pattern-matching, something that Racket is already good at.

Racket also already has a facility for creating custom data structures in the form of structs, which are extremely flexible, but also a little verbose. Racket structs are more powerful than we need, but that means we can implement our ADTs in terms of Racket’s struct system.

scheme
racket
algebraic-data-types
ADT
macro
Racket also already has a facility for creating custom data structures in the form of structs, which are extremely flexible, but also a little verbose. Racket structs are more powerful than we need, but that means we can implement our ADTs in terms of Racket’s struct system.

april 2017 by rcyphers

The Derivative of a Regular Type is its Type of One-Hole Contexts

january 2017 by darren_n

Polymorphic regular types are tree-like datatypes generated

by polynomial type expressions over a set of free

variables and closed under least fixed point. The ‘equality

types’ of Core MLcan be expressed in this form. Given

such a type expression ✁

with ✂ free, this paper shows a

way to represent the one-hole contexts for elements of ✂

within elements of ✁

, together with an operation which

will plug an element of ✂ into the hole of such a context.

One-hole contexts are given as inhabitants of a regular

type ✄✆☎ ✁

, computed generically from the syntactic structure

of ✁

by a mechanism better known as partial differentiation.

The relevant notion of containment is shown to

be appropriately characterized in terms of derivatives and

plugging in. The technology is then exploited to give the

one-hole contexts for sub-elements of recursive types in a

manner similar to Huet’s ‘zippers’[Hue97].

adt
programming
paper
by polynomial type expressions over a set of free

variables and closed under least fixed point. The ‘equality

types’ of Core MLcan be expressed in this form. Given

such a type expression ✁

with ✂ free, this paper shows a

way to represent the one-hole contexts for elements of ✂

within elements of ✁

, together with an operation which

will plug an element of ✂ into the hole of such a context.

One-hole contexts are given as inhabitants of a regular

type ✄✆☎ ✁

, computed generically from the syntactic structure

of ✁

by a mechanism better known as partial differentiation.

The relevant notion of containment is shown to

be appropriately characterized in terms of derivatives and

plugging in. The technology is then exploited to give the

one-hole contexts for sub-elements of recursive types in a

manner similar to Huet’s ‘zippers’[Hue97].

january 2017 by darren_n

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