Christian Heilmann

Quick Tip: How to capture and replace newlines in liquid for Jekyll/GitHub Pages

December 17th, 2020

As part of the re-write of The Developer Advocacy Handbook I needed to have blockquotes with different classes. With GitHub Pages markdown you can do that using the > notation: > Fact: There are no bad students or a bad audience—only bad workshops and talks. Your mood, dedication and enthusiasm do become those […]

Update to the Developer Evangelism/Advocacy handbook almost complete

December 15th, 2020

Eleven years ago I wrote the Developer Evangelism Handbook .Last month I was approached by a publisher who is interested to print it in another language. Whilst flattered, I also couldn’t let that happen as there are parts of the book that are quaintly outdated now. Some of the products I promote aren’t available any […]

Shifting an image with canvas

November 23rd, 2020

As part of my Tile Editor I needed a way to shift an image by x pixels left, right, up or down. I didn’t need to move the image, I needed to shift the pixels of the image. This allows you now to shift the image and thus makes painting seamless tiles much easier. Now, […]