NickHeiner

// One classic purpose of a function returning a function is to do partial application.
// Let's say we have a function that adds two numbers:
function add(x, y) {
  return x + y;
}

// Then, we want to make a function that adds 9000 to the argument:
function itsOver9000(x) {
  return add(9000, x);
}

NickHeiner

** Originally written in Fall 2011. **

Lessons Learned from Corpionage

This semester, I worked on Corpionage, a Facebook game for people who like to mess with their friends. I thought it turned out pretty well, but there are a few key take-aways.

Our general architecture:

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Weka's API is Cumbersome

I've only used Weka a bit, and it appears to be an impressive machine learning toolkit. However, its API is quite a pain to deal with.

Consider the following code that I wrote, which translates from one representation of an example to Instance, used by Weka:

public static Instance getInstance(WeatherLabeledFeatureVector featureVector, Instances instances) {
  Instance inst = new DenseInstance(instances.numAttributes());
  for (int i = 0; i  attInfo, int capacity) {

// ...

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> Install-Package NUnit
> Install-Package NUnitTestAdapter

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module MainTest

open NUnit.Framework

[<Test>]
let ``When 2 is added to 2 expect 4``() =
    Assert.AreEqual(4, 2+2)

[<Test>]
let ``When 2 is added to 2 expect 5``() =

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t.test('returns the correct value', function(t) {
  t.plan(1);
  doAsyncWork().then(function(actualResult) {
    t.equal(actualResult, expectedResult);
  });
})

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it('returns the correct value', function() {
  makeServerRequest().then(function(response) {
      expect(response.statusCode).to.equal(200);
  });
});

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it('returns the correct value', function() {
  return doAsyncWork().then(function(actualResult) {
      expect(actualResult).to.equal(expectedResult);
  });
});

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it('returns the correct value', function(done) {
  doAsyncWork().then(function(actualResult) {
      expect(actualResult).to.equal(expectedResult);
  }).finally(done);
});

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// Some setup code omitted for brevity
nock('https://our-backend-service.opower.it')
    .post('/endpoint/we/depend/on')
        // Make your test more interesting by declaring which headers you care about
        // Nock lets you declare matchers on many aspects of the request
        .matchHeader('Content-type', 'application/json')
        .reply(200, function(uri, requestBody) {
            t.deepEqual(
                requestBody, 
                expectedRequestBody,