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Things I learned the hard way using React Native

Set up your environment carefully: It's important to have one canonical source of truth per environment, per platform. (i.e. iOS Development, iOS Testflight, iOS Production, ditto Android.) Every time you build, your config should propagate values from one input source (per platform) to either Java/JavaScript or Objective-C/JavaScript. Here's what we did for Android and here's what we did for iOS. I don't doubt that you can do better. Please do better. But you can't say that we didn't have one canonical source of truth that worked very simply and effectively throughout the development process.

Don't wait until the end to develop Android and iOS concurrently: Even if you're not actively focusing on both platforms, don't assume that "RN is cross platform… we can develop iOS and flip the Android switch when we'r

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Adding an audit log to your Rails app

If you have any sort of administrative interface on your web site, you can easily imagine an intruder gaining access and mucking about. How do you know the extent of the damage? Adding an audit log to your app is one quick solution. An audit log should record a few things:

• controller entry points with parameter values
• permanent information about the user, like user_id
• transient information about the user, like IP and user_agent

Using the Rails framework, this is as simple as adding a before_action to your admin controllers. Here’s a basic version that I’m using in production.

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$grid-float-breakpoint: 1px; //force navbar to never collapse into mobile version

@media (min-width: 980px)  {
  .container{
      width: 970px !important;
  }
}

@media (max-width: 980px) {
  .container{

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#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)