apl a day

Jun
02

APL a Day #7: Scalar Functions

Scalar functions perform most of the hard labor in an APL program. A scalar function defines a mapping from one
1 min read
May
27

APL a Day #6: Indices and Encoding

Previous sessions established a basic conception of indexing an array. Namely, an index encodes a reference to an element in
1 min read
Feb
25

APL a Day #5: Indexing into Arrays

By now, clearly a shape and vector of values precisely determines an array. All APL functions operate over arrays; they
3 min read
Jan
18

APL a Day #4: Arrays have elements

An array that only describes a box which may contain elements, but that does not contain any elements, does not
3 min read
Jan
10

APL a Day #3: Arrays have Shape

Arrays arrange data into a certain rectangular shape. In APL, the shape of an array is a vector --- yes,
3 min read
Jan
04

APL a Day #2: Arrays, Values

Last session belabored the function, it's relation to APL, and how APL's treatment of functions differs from traditional mathematics. Keep
2 min read
Jan
01

APL a Day #1: Functions

In early grade school mathematics, students already learn the concept of a function, but they do not know what they
3 min read
Dec
31

APL a Day #0: Introduction

The APL community seems ripe for a quick, simple, accessible daily series on APL, and here it is. What better
1 min read