# Mathspp Blog

#### apl — The APL programming language

##### Hold my parentheses

Explore unusual Python features to solve the problem of determining whether an expression is properly parenthesised.

##### What learning APL taught me about Python

Learning programming in APL taught me many new things about Python and this article is an account of that.

##### Connecting Python and Dyalog APL with sockets

This article shows how to communicate between Python and Dyalog APL through the use of sockets. We will use the module socket from Python and the Conga workspace from Dyalog.

##### Solving Wordle with APL

Join me in solving the word game Wordle in (Dyalog) APL.

##### Why APL is a language worth knowing

Let me show you characteristics of APL that will influence your understanding of programming concepts and the way you use other languages.

##### TIL #034 – multi-channel transposed convolution

Today I learned about multi-channel transposed convolutions.

##### TIL #033 – transposed convolution

Today I learned about the transposed convolution transformation in CNNs.

##### TIL #021 – Spouge's formula

Today I learned about Spouge's formula to approximate the factorial.

##### Counting mosaics with APL

This is a short article on how I quickly used APL to verify my combinatorics calculations.

##### Let's build a simple interpreter for APL - part 4

In part 4 of this series we add some unit testing, improve our tokenizer and implement the primitives ⍴ and ⍤.

##### Let's build a simple interpreter for APL - part 3 - the array model

In this blog post we will go over some significant changes, from implementing APL's array model to introducing dyadic operators!

##### My two cents on the 2020 APL competition

The 2020 APL programming competition was tough! In this post I share a couple of thoughts and my solutions.

##### Studying the "24 Game"

The 24 Game is a well-known maths game that is played with kids in school to help them master the four basic arithmetic operations. In this blog post we will study the game in depth.

##### Let's build a simple interpreter for APL - part 2

Today is the day! Today is the day we take our APL programs and interpret them, so that something like ÷ 1 2 3 -⍨ 1.1 2.2 3.3 can output 10 5 3.33333333.

##### Problem #018 - circle of hats

$$n$$ mathematicians with numbered party hats gather around in a circle... It is a matter of life or death!

##### Let's build a simple interpreter for APL - part 1

Let's build a simple APL interpreter! APL is an array-oriented programming language I picked up recently. The ease with which I can write code related to mathematics, its strange built-ins (which look like ⍴, ⍨, ⍒ or ⍣) and the fact that it is executed from right to left make it a fresh learning experience!