This is similar to the previous blog post except this is more direct. The answer is “Yes” for all tested languages except C and C++. This may seem trivial until you meet a situation where the same original object is shared across requests/sessions, like a public static variable in Java or an incorrectly scoped Javascript …
As per title, ran this across various languages. Results are mixed, but IMHO, it seems unsafe to design your functions/methods this way. It would be better to pass in the object, compute the changes without modifying the object, return the computed changes and assign it back to the original variable. Below are sample code snippets …
Continue reading “Does modifying objects passed in to functions modify original object?”
Been using a lot of print() when working on iOS projects. Hoping to see more information printed to aid in debugging, I did up a simple logging class in Swift which infers the file, function and line number where the logging is done. Not using the stack trace as the output from Thread.callStackSymbols is not …
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Sample of page loaded in web view: <html> <body> <script> function getWindowInfo() { return { width: window.innerWidth || document.body.clientWidth, height: window.innerHeight || document.body.clientHeight } }; </script> </body> </html> In a UIView or UIViewController: import WebKit // Enable Javascript in web view let config = WKWebViewConfiguration() let prefs = WKPreferences() prefs.javaScriptEnabled = true config.preferences = prefs …
Continue reading “Evaluating Javascript using WKWebView in iOS”
As mentioned in my previous post on Fix for Google Analytics pod not working in Swift framework a few months ago, I was helping to refactor a client’s outsourced mobile SDKs. Last month, one of their clients had issues using the iOS SDK in their Objective-C app. Turns out that the Swift framework, i.e. the …
Continue reading “Lessons from writing Swift framework that works in Objective-C app”
When we design a user interface (UI) for our application, we want it to be user-friendly, for the user to have a good user experience (UX). How about application programming interfaces (API)? Shouldn’t an API be designed to be user-friendly as well? And in this case, who are the main users/consumers of APIs? Developers, of …
Continue reading “Designing Developer-Friendly JSON for API responses”
Attended a workshop on “Introduction to iOS Development with Swift 4” last year on 07 Oct 2017. Got a better idea of Optionals and penned down some notes in a GitHub gist. Thought it would be better to put them in a blog post to make it more accessible 🙂 The gist of it is …
Continue reading “Auto unwrapping of Optionals when let is used with if and guard”
Reference: StackOverflow – Print Struct name in swift Here’s the code for printing the properties of an object func printProperties(_ object: Any) { var properties = [String: Any]() Mirror(reflecting: object).children.forEach { (child) in if let property = child.label { properties[property] = child.value } } print(object) print(type(of: object)) print(properties) } How the output would look like …
Recently, I have been working on a mobile app SDK for a client, both in Android and iOS. The Android SDK is packaged as an AAR while the iOS is packaged as a Swift framework. The SDK uses Google Analytics. The problem arose when using the Google Analytics iOS SDK – it works fine when …
Continue reading “Fix for Google Analytics pod not working in Swift framework”
Was trying to show an alert dialog in a project’s AppDelegate.swift and ViewController.swift and decided to move it to a function in a separate utility class. Main issue was how to make it work as the class was a plain Swift class – self.present() could be used inside ViewController, self.window?.rootViewController?.present() could be used inside AppDelegate, …
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