Andrea Prearo – Medium

Andrea Prearo
in
Better Programming

Model Separation: Parsing With Codable and Persisting With Core Data

Separate the domain model from the persistence model in Core Data for better testability

4 min readJan 3, 2022

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Model Separation: Parsing With Codable and Persisting With Core Data

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Andrea Prearo

Multi-platform mobile networking libraries with Ktor

Read the full story on Granular Engineering:

1 min readJul 13, 2020

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Andrea Prearo

Programmatic Views in Swift: Parallax and Scale

After using Storyboards for many years, I recently decided to switch to Programmatic Views and Programmatic Autolayout for my personal…

5 min readSep 25, 2018

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Programmatic Views in Swift: Parallax and Scale

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Andrea Prearo

Working with Codable and Core Data

Recently, I have been working on implementing a caching mechanism for an iOS app. In order to achieve that, I set the following goals:

5 min readMay 7, 2018

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Working with Codable and Core Data

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Andrea Prearo
in
Capital One Tech

An Alternative to Type Erasure for Generic Protocols

Can a technique called Type Wrapping help when iterating over a number of objects conforming to the same protocol with associated type?

7 min readJan 11, 2018

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An Alternative to Type Erasure for Generic Protocols

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Andrea Prearo
in
Capital One Tech

Generic Data Sources in Swift

In the vast majority of iOS apps I’ve been working on, table views and collection views have been the most commonly used UI components. As…

11 min readJul 5, 2017

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Generic Data Sources in Swift

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Andrea Prearo
in
Capital One Tech

Boost Smooth Scrolling with iOS 10 Pre-Fetching API

In a previous post, we explored some common strategies to achieve smooth scrolling in our iOS mobile apps. The main goal of applying those…

8 min readApr 3, 2017

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Boost Smooth Scrolling with iOS 10 Pre-Fetching API

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Andrea Prearo
in
Capital One Tech

Smooth Scrolling in UITableView and UICollectionView

As most iOS developers know, displaying sets of data is a rather common task in building a mobile app. Apple’s SDK provides two components…

6 min readJan 25, 2017

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Smooth Scrolling in UITableView and UICollectionView

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Andrea Prearo
in
Capital One Tech

Reference and Value Types in Swift

In this post we are going to examine the differences between reference and value types. We’ll introduce both concepts, take a look at their…

10 min readJul 14, 2016

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Reference and Value Types in Swift

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Andrea Prearo

JSON parsing in Swift — Part II: a functional approach to JSON parsing

In this second part of the article we will continue the discussion started in Part I and examine the remaining steps to implement the…

6 min readJun 1, 2016

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JSON parsing in Swift — Part II: a functional approach to JSON parsing

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Andrea Prearo

Andrea Prearo

Experienced iOS Engineer and Software Craftsman with extensive expertise in building reusable libraries and components to scale development teams and products.

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