with the lower bound of the Wilson score confidence interval for a Bernoulli parameter — As the amazing Evan Miller explains in his popular article on”How not to sort by average rating” the most commonly found systems for ranking stuff on the web based on user up and down-votes are seriously flawed. A better way to calculate a useful ranking score is to get the…

How often have you written this line? var args = Array.prototype.slice.call(arguments); Well, with ES2015 Reflect.apply(target, thisArgument, argumentsList) effectively deprecates Function.prototype.apply and Function.prototype.call. And how do you do that with array like arguments object? That’s how: const args = Reflect.apply(Array.prototype.slice, arguments, []);

Previously I wrote about React Unit Testing with Tape, which is great for testing small, well defined components, but when working on a larger, more complex code base Tape tends to be a tat insufficient for the job. Enter: Enzyme, Lab and Code. AirBnB’s Enzyme library allows for testing React…

Once in a while you need to re-require a node module and don’t want to use Node’s require cache. Why and when could this be useful? Well, for your unit tests. Assume you test a module that stores & returns values in closure dependent on an environmental variable. …

How do you test if an array contains a specific element? You have done this before, and I might bet you used some variation of this: function test(arr, e) { if (arr.indexOf(e) === -1) { return false } else { return true } } But this can be done much…

Update. June, 2016: If you are working on a bigger project you might find Tape not quite up for the job, take a look at React Unit Testing with Enzyme, Lab and Code This is a short intro into testing React applications using Tape. If you were wondering why you…

Ever get messy with with the logic for applying different styles in your React Components? I believe following approach is good practice to get a handle on this. The idea is to use a function that returns a composite style object for the target element depending on a condition passed…

Currently I am experimenting with React Native for Android during Hackweek at the New York Times. And of course, it wouldn’t be the New York Times if they hadn’t their own fonts and style specs that are important. If you are like me looking to implement custom fonts using React…

(If you are looking for the source code scroll all the way down for the link) — So, I have these random trains of thoughts sometimes. They go like this: I wonder about the universe, about evolution and life out there, wonder if someone else is looking back while I'm staring up into the night sky. Is there intelligent life out there? Is life merely an inevitable…