Category Archives: Uncategorized

Quick add event listener in console to get mouse position

Trying to figure out where to position something and just want to see the pixel location of the mouse in the console?  Add the following in your console, then scroll around. document.addEventListener(‘mousemove’, function(e){   console.log(“x: ” + e.clientX + ” … Continue reading

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Adding Waves!

Inspired by a physical exhibit at the Exploratorium that used sliders to add sine waves, I built an online version here.  I liked the physicality of the bars in the original exhibit because it emphasized that the heights were being … Continue reading

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Circular images, with D3

A friend wrote to me today stuck on a d3 problem.  He was looking to create circles with images in them from a set of horizontal and vertical photographs.  The goal was to have the image fill the circle, such … Continue reading

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Why make it about boys and girls. Instead, let’s create a rich, varied education experience for everyone?

I read this NYT Opinion piece today, which argues that boys learn differently than girls and that we need teachers to be “boy-friendly.”  Here is my response. Are the bell curves really so distinct that this is truly about boys … Continue reading

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Choosing white or black text to contrast with a light or dark background

Today I needed a way to switch to using white text if the background was particularly dark. 24ways.org had a blog post on the topic, which offered this small javascript function. function getContrast50(hexcolor){ return (parseInt(hexcolor, 16) > 0xffffff/2) ? ‘black’:’white’; … Continue reading

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Swedish Parental Birth Age Study: shows sensitivity to confounding factors

Read an interesting study this morning on various psychological and academic outcomes based on age of Dad at birth.  http://www.wrrh308.com/wp-content/uploads/2014/03/JAMA-Study.pdf It’s interesting to see how much the conclusion can change based on the factors that the researchers take into account.  … Continue reading

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tabula: best thing ever

I just discovered Tabula, which converts PDFs into a form that can be saved as a csv or other usable data format.  If you know the pain of having beautiful data right there in front of you but in a … Continue reading

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