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A little experiment to find the fastest for-loop for an object. Approx. Results: ARY-INDEX: “for(var i = 0” -> 13ms OBJ-INDEX: “for(var i = 0” -> 218ms OBJ-KEY: “for(var i in” -> 975ms var len = 1000000; // ARRAY VERSION var check = 0; var ary = []; for( var i = 0, l = […]

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In Faster Javascript Part 1 we compared a three methods for evaluating a string of alien DNA. With Switch, Boolean & Conditional going head to head, Switch was the clear winner with Conditional (Ternary) trailing way behind. Testing methods is one thing, but there’s more to writing fast code than just testing. For example: order […]

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We are exploring the possibility of developing a workshop to help high-school students solidify their knowledge of core mathematical concepts using a computer to write Javascript code. The best way for a student to demonstrate and reinforce knowledge of mathematical concepts is to be able to teach them or explain them to another person. We […]

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If you’re interested in parametric or generative design (the terminology doesn’t seem to be well standardized) you have probably run into Voronoi diagrams and their cousins, Delaunay triangulations. The latter can be used to make concave hulls given an input point set, a construction which is called an Alpha Shape. Jim Clarkson wrote a great […]

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How to find the height of a triangle in JavaScript if you only have the 3 vertexes/points of the triangle. Assuming that XY are the top of your triangle, and X1Y1, X2Y2 are the other two points, you can find the height of the triangle using Pythagorean theorem. This method works for Isosceles or Equilateral […]

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I was reading 2600 on the bus recently and came across a credit generation algorithms which got me thinking… if you are building a web application that charges credit cards, at which point would card validation make most sense? I came to the conclusion that an efficient system, would check the credit card number was […]

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Today, keyboard navigation went live on the new jQuery documentation site: api.jquery.com. Rick worked really hard on getting the interaction just right, and we think this makes using the documentation a faster and easier experience . We hope that this feature improves developers’ interaction with the documentation. We recently had the opportunity to work with […]

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Ever wonder how many files or lines of code are sitting in your project? Hop on the command line and run the following find commands in your bash Find the number of files in the current directory (runs recursively down into all subdirectories): find . | wc -l Find how many lines of code are […]

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The path to httpd on redhat 9 is /etc/init.d/httpd You can run the following commands on it: /etc/init.d/httpd configtest /etc/init.d/httpd graceful /etc/init.d/httpd restart /etc/init.d/httpd stop /etc/init.d/httpd start I always run configtest before restarting to make sure I haven’t messed anything up.

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As a follow up to my previous post regarding Javascript Web Workers, I’m pleased to announce the release of PollenJS, the first worker-specific javascript library: PollenJS on github PollenJS offers the following: Utility Methods fn trim each to_array in_array clone last unique merge filter map keys values isArr isFn isStr isNum isUndef isNull extend JSON […]