This simple recursive bash function replaces cd .. . 1 works like cd .. . 2 works like cd ../../ and so on. . works like . 1. .() { , ${1:-1}; }; ,() { local N=$(($1-1)) C=${1/#0*/cd} D=${1/#[1-9*]/../};

Null is problematic, but why? Let's see why, and let that guide us to new alternatives.

How can we improve the PHP functional programming story? This is how.

We've seen reduction, we've seen recursion, now see the mirror that connects them. Also, a musical.

Taking a basin, recursively.

Reverse engineering broken LEDs, the functional way

A little math, a little mapping, and quantum crabs

Counting an infinite stream of fish

Zip, lines, ziplines, and pipes all the way down

Who's on first(), a fancier reduce(), flatten()ing arrays, state tracking, and playing bingo with a squid.

In which we discuss recursion, memoization, and bit flipping.

In which we learn about maps, reduction, generators, immutable data modeling, with-er methods, and submarines.

In which we learn about PHP 8.1, functional composition, pipes, and partial function application.

Functional PHP programming in this year's Advent of Code!

Making the case for the Partial Function Application and Pipes RFCs for PHP

Moved to

Analyzing how improvements to PHP would impact various use cases

Composition works for functions, too. In fact, it's at the core of functional programming.

Separate out preparing your data from using it, with filter()