[xsl] How do you avoid relearning the same coding technique over and over?

["Roger L Costello costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Folks,

A few days ago, I needed some code to iterate over a set of folders and then
for each folder iterate over its files.

Over the years I have solved that problem--use the expath file module--many
times. In my most recent need, I spent a few minutes searching my file system
to find an XSLT program that uses the expath module, but I didn't find
anything, so I spent time relearning how to use the expath file module. What a
waste of time.

In the ideal world, when I develop some code--such as code to iterate over
folders and subfolders--I would pause what I'm doing, create example code
showing how to solve the task, and store that example code in some location on
my file system that I'll remember 6 months, 6 years later. Alas, I'm in a
hurry. I don't do that.

What's the solution? Discipline? No matter how much I'm in a hurry, stop and
create an example. Is that the solution?

How do you avoid relearning the same coding technique over and over?

/Roger