deanmarano

handleLocationChange: function() {
 this.removeOldMarkers(this.get(‘currentLocations’));
 this.set(‘currentLocations’, this.get(‘locations’);
 this.addMarkers(this.get(‘locations’));
}.observes(‘locations’),

removeOldMarkers: function(markers) {
 markers.forEach(function(marker) {
   // remove markers from Google map
 });

deanmarano

locations: function(key, value, oldValue) {
 if(value) {
   this.removeOldMarkers(oldValue);
   this.addMarkers(value);
 }
 return value;
}.property(),

removeOldMarkers: function(markers) {
 markers.forEach(function(marker) {

deanmarano

Scopes vs. Closures

Scopes and closures are often confused since they are so closely related. In your day to day life, it's somewhat rare that you'll need to know the difference. However, if you enjoy using the debugger, this may have bit you without you even knowing it.

Scope

https://developer.mozilla.org/en-US/docs/Glossary/Scope In Javascript, creating a new function creates a new scope. These are the variables that are defined in the current frame of the stack.

deanmarano

Scopes vs. Closures

Scopes and closures are often confused since they are so closely related. In your day to day life, it's somewhat rare that you'll need to know the difference. However, if you enjoy using the debugger, this may have bit you without you even knowing it.

Scope

https://developer.mozilla.org/en-US/docs/Glossary/Scope In Javascript, creating a new function creates a new scope. These are the variables that are defined in the current frame of the stack.

deanmarano

https://lostechies.com/chadmyers/2008/11/21/do-not-test-private-methods/
http://peterprovost.org/blog/2012/05/31/my-take-on-unit-testing-private-methods/
https://dzone.com/articles/why-shouldnt-i-test-private
http://programmers.stackexchange.com/questions/135047/new-to-tdd-should-i-avoid-private-methods-now

deanmarano

class UserEnroller
  attr_reader :user, :email

  def initialize(user)
    @user = user
    if @user
      # do some initialization, set some variables
    end
  end

deanmarano

General

(bullets need expanding or categorization)

• Class names should not be verbs, nor should they be verbs turned into nouns. (ex Enroller, UserAuthenticator)
• Don't be clever. Clever is not obvious, and harder to read. Always code for the reader.
• Reading code is hard. Writing code is easy. Get better at reading code.
• Wrap third party calls (anything over the network) in their own wrapper. Don't make network calls outside of wrapper classes.
• The rule of proximity - declare variables, methods, imports, etc. as close as possible to where they are used. (exception - standards of grouping imports near the top, etc.)
• Push conditionals to the edges - out (to your public API) and in (towards the APIs you use), away from the middle.
• If you’re writing a web service, play with the idea of making new endpoints instead of conditionals as query params

deanmarano

General

• Conceptual Depth
• Freediving Video
• Dev Tips

Books

• The Hard Thing About Hard Things
• How To Live The Good Life

deanmarano

Veggies

• 2 jalapeno peppers
• 4 cloves garlic
• 1 tablespoon ginger
• 2 onions
• 1 medium tomato
• 1/2 pounds carrots, peeled and sliced

Fruits

• 1/4 cup lime juice

deanmarano

itPromises = (testName, testFn) ->
  it testName, (done) ->
    promise = testFn()
    if typeof promise.then == 'function'
      promise.then(done, ->
        fail("Promise was rejected - #{JSON.stringify(arguments)}")
      )
    else
      fail('specs with itPromises needs to return a promise')
      done()