https://ahmetbalaman.com/en/blog/ Flutter, Swift, .NET and algorithm lessons, plus notes from building my own apps. en-US Ahmet Balaman Sun, 20 Sep 2026 00:00:00 GMT https://ahmetbalaman.com/en/blog/what-is-jev-system-one-reflex-model-en/ https://ahmetbalaman.com/en/blog/what-is-jev-system-one-reflex-model-en/ Sun, 20 Sep 2026 00:00:00 GMT JEV is not a chat model; it is a model that decides. Here is the System One idea, the three question types, the pricing, and the limits — starting from your first call. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/what-is-higgsfield-ai-video-generation-guide-en/ https://ahmetbalaman.com/en/blog/what-is-higgsfield-ai-video-generation-guide-en/ Sun, 20 Sep 2026 00:00:00 GMT Which models Higgsfield hosts, how credits really work, how to produce your first shot, and which tool to reach for on which job. ai-video Ahmet Balaman https://ahmetbalaman.com/en/blog/real-cost-of-shipping-5-apps-with-vibe-coding-en/ https://ahmetbalaman.com/en/blog/real-cost-of-shipping-5-apps-with-vibe-coding-en/ Sun, 20 Sep 2026 00:00:00 GMT LevelUpStudy, Recapday, MimBop, Talkamble and Golden Pixel. Model subscription, store fees, the hidden line items, and what actually turns out expensive. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/multilingual-blog-hreflang-technical-seo-en/ https://ahmetbalaman.com/en/blog/multilingual-blog-hreflang-technical-seo-en/ Sun, 20 Sep 2026 00:00:00 GMT Nearly 400 posts in three languages: how I stopped hreflang from silently disappearing, killed CLS, and fixed an icon font cached for a year — with working code. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/making-video-with-ai-complete-guide-en/ https://ahmetbalaman.com/en/blog/making-video-with-ai-complete-guide-en/ Sun, 20 Sep 2026 00:00:00 GMT Script to storyboard, generation to edit, captions to thumbnail: the whole workflow for making video with AI, with tool selection and the cost maths. ai-video Ahmet Balaman https://ahmetbalaman.com/en/blog/jev-use-cases-10-real-scenarios-en/ https://ahmetbalaman.com/en/blog/jev-use-cases-10-real-scenarios-en/ Sun, 20 Sep 2026 00:00:00 GMT From comment moderation to agent tool selection, model routing and RAG filtering: ten scenarios where JEV genuinely earns its place, with code and cost comparisons. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/jev-choice-score-noul-question-types-en/ https://ahmetbalaman.com/en/blog/jev-choice-score-noul-question-types-en/ Sun, 20 Sep 2026 00:00:00 GMT The three JEV question types, the rules for writing criteria, the difference between probability and confidence, and why dozens of questions belong in one call. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/higgsfield-genjutsu-video-to-video-with-blender-en/ https://ahmetbalaman.com/en/blog/higgsfield-genjutsu-video-to-video-with-blender-en/ Sun, 20 Sep 2026 00:00:00 GMT Genjutsu keeps the motion and rebuilds the scene. Here are its two modes, its real limits, and how to turn a rough Blender block-out into an action shot. ai-video Ahmet Balaman https://ahmetbalaman.com/en/blog/google-flow-vs-higgsfield-compared-en/ https://ahmetbalaman.com/en/blog/google-flow-vs-higgsfield-compared-en/ Sun, 20 Sep 2026 00:00:00 GMT Flow's scene building against Higgsfield's model range: how credits work, what each is genuinely good at, and when to pick which. ai-video Ahmet Balaman https://ahmetbalaman.com/en/blog/free-ai-coding-opencode-with-free-models-en/ https://ahmetbalaman.com/en/blog/free-ai-coding-opencode-with-free-models-en/ Sun, 20 Sep 2026 00:00:00 GMT Plugging your own key into open-source opencode and running free or near-free models: setup, provider config, and what free actually costs you. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/building-a-harness-around-jev-cost-and-limits-en/ https://ahmetbalaman.com/en/blog/building-a-harness-around-jev-cost-and-limits-en/ Sun, 20 Sep 2026 00:00:00 GMT On its own JEV produces a cloud of probabilities. Here is how to build the harness that turns it into action, which architecture patterns to use, and where the model is known to be weak. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/animated-app-with-higgsfield-and-fable-en/ https://ahmetbalaman.com/en/blog/animated-app-with-higgsfield-and-fable-en/ Sun, 20 Sep 2026 00:00:00 GMT Generating the character, the backdrop and the animations and dropping them into the app: the MCP connector, giving context with a screen recording, Lottie, and previewing on a phone with Expo. ai-video Ahmet Balaman https://ahmetbalaman.com/en/blog/swiftui-state-binding-observable-data-flow-en/ https://ahmetbalaman.com/en/blog/swiftui-state-binding-observable-data-flow-en/ Sat, 19 Sep 2026 00:00:00 GMT When to use @State, @Binding, @Observable, @Bindable and @Environment in SwiftUI, how they map to ObservableObject, with a decision table and common bugs. swift Ahmet Balaman https://ahmetbalaman.com/en/blog/swift-struct-vs-class-difference-en/ https://ahmetbalaman.com/en/blog/swift-struct-vs-class-difference-en/ Sat, 19 Sep 2026 00:00:00 GMT Learn the difference between struct and class in Swift with runnable examples: copying, mutating, let, ===, inheritance, deinit and how to choose. swift Ahmet Balaman https://ahmetbalaman.com/en/blog/swift-closures-explained-en/ https://ahmetbalaman.com/en/blog/swift-closures-explained-en/ Sat, 19 Sep 2026 00:00:00 GMT Learn Swift closure syntax step by step from the full form to $0 shorthand: trailing closures, capturing values, @escaping, retain cycles and [weak self]. swift Ahmet Balaman https://ahmetbalaman.com/en/blog/swift-async-await-concurrency-guide-en/ https://ahmetbalaman.com/en/blog/swift-async-await-concurrency-guide-en/ Sat, 19 Sep 2026 00:00:00 GMT From completion handlers to async/await: Task, async let, TaskGroup, @MainActor, actors, cancellation and a JSON API call with URLSession in SwiftUI. swift Ahmet Balaman https://ahmetbalaman.com/en/blog/sorting-algorithms-exam-questions-and-solutions-en/ https://ahmetbalaman.com/en/blog/sorting-algorithms-exam-questions-and-solutions-en/ Sat, 19 Sep 2026 00:00:00 GMT Bubble, selection, insertion, merge and quick sort: one comparison table, pass-by-pass array traces and 8 exam questions solved step by step. algorithm Ahmet Balaman https://ahmetbalaman.com/en/blog/seoul-climate-card-unlimited-subway-bus-pass-en/ https://ahmetbalaman.com/en/blog/seoul-climate-card-unlimited-subway-bus-pass-en/ Sat, 19 Sep 2026 00:00:00 GMT Seoul Climate Card: 5-day pass for 15,000 won plus 3,000 won card. Unlimited subway and buses, prices, where to buy and where it doesn't work. gezi Ahmet Balaman https://ahmetbalaman.com/en/blog/recapday-couple-mode-how-it-came-to-be-en/ https://ahmetbalaman.com/en/blog/recapday-couple-mode-how-it-came-to-be-en/ Sat, 19 Sep 2026 00:00:00 GMT How Couple Mode found its way into Recapday: what changes at two people, why a mode beat a separate app, and what I deliberately left out. vibe-coding Ahmet Balaman https://ahmetbalaman.com/en/blog/csharp-interface-vs-abstract-class-en/ https://ahmetbalaman.com/en/blog/csharp-interface-vs-abstract-class-en/ Sat, 19 Sep 2026 00:00:00 GMT C# interface vs abstract class: what each can contain, multiple interfaces, a decision guide, a payment example and typical exam questions with answers. dotnet Ahmet Balaman https://ahmetbalaman.com/en/blog/csharp-inheritance-polymorphism-guide-en/ https://ahmetbalaman.com/en/blog/csharp-inheritance-polymorphism-guide-en/ Sat, 19 Sep 2026 00:00:00 GMT C# inheritance and polymorphism guide: base, constructor chaining, virtual/override vs new, sealed, is/as and the classic "what does this print?" question. dotnet Ahmet Balaman https://ahmetbalaman.com/en/blog/building-your-first-app-with-swiftui-en/ https://ahmetbalaman.com/en/blog/building-your-first-app-with-swiftui-en/ Sat, 19 Sep 2026 00:00:00 GMT Build your first SwiftUI app from an empty Xcode project to the simulator: App, View, VStack, @State, List and TextField in a working to-do list. swift Ahmet Balaman https://ahmetbalaman.com/en/blog/binary-search-tree-exam-questions-en/ https://ahmetbalaman.com/en/blog/binary-search-tree-exam-questions-en/ Sat, 19 Sep 2026 00:00:00 GMT The BST property, insert, search and delete, inorder/preorder/postorder traversal, height and the degenerate case; 7 exam questions with drawn trees. algorithm Ahmet Balaman https://ahmetbalaman.com/en/blog/big-o-notation-time-complexity-guide-en/ https://ahmetbalaman.com/en/blog/big-o-notation-time-complexity-guide-en/ Sat, 19 Sep 2026 00:00:00 GMT What Big O means and how to find the complexity of loops and recursion: O/Ω/Θ, the Master theorem, space complexity and 8 solved exercises. algorithm Ahmet Balaman https://ahmetbalaman.com/en/blog/aspnet-core-minimal-api-getting-started-en/ https://ahmetbalaman.com/en/blog/aspnet-core-minimal-api-getting-started-en/ Sat, 19 Sep 2026 00:00:00 GMT Build a REST API from scratch with ASP.NET Core Minimal APIs: MapGet/MapPost, route parameters, TypedResults, dependency injection, validation, curl tests. dotnet Ahmet Balaman https://ahmetbalaman.com/en/blog/app-store-app-publishing-process-guide-en/ https://ahmetbalaman.com/en/blog/app-store-app-publishing-process-guide-en/ Sat, 19 Sep 2026 00:00:00 GMT From the Apple Developer account and App Store Connect record to TestFlight and review: how to publish an iOS app and the most common rejection reasons. swift Ahmet Balaman https://ahmetbalaman.com/en/blog/seoul-money-exchange-myeongdong-best-rate-en/ https://ahmetbalaman.com/en/blog/seoul-money-exchange-myeongdong-best-rate-en/ Fri, 18 Sep 2026 00:00:00 GMT We got 149,500 won for US$100 in Myeongdong, far better than the airport. Rate tips, small buy-sell spread and a free toy for a Google review. gezi Ahmet Balaman https://ahmetbalaman.com/en/blog/urban-hotel-play-sinchon-seoul-stay-en/ https://ahmetbalaman.com/en/blog/urban-hotel-play-sinchon-seoul-stay-en/ Thu, 17 Sep 2026 00:00:00 GMT Urban Hotel & Play in Sinchon, Seoul: 4 nights for about 10,000 TRY. Spotless rooms, free drinks, a 5-PC gaming room, 5 minutes to the subway. gezi Ahmet Balaman https://ahmetbalaman.com/en/blog/incheon-airport-to-seoul-cheapest-transport-en/ https://ahmetbalaman.com/en/blog/incheon-airport-to-seoul-cheapest-transport-en/ Wed, 16 Sep 2026 00:00:00 GMT AREX all-stop train for 4,750–5,350 won or the airport bus for about 17,000 won. Incheon to central Seoul transport options, travel times and a cash tip. gezi Ahmet Balaman https://ahmetbalaman.com/en/blog/bangkok-to-seoul-flight-k-eta-application-guide-en/ https://ahmetbalaman.com/en/blog/bangkok-to-seoul-flight-k-eta-application-guide-en/ Wed, 16 Sep 2026 00:00:00 GMT We flew Bangkok to Seoul with VietJet in about 6 hours. What the K-ETA is, what it costs, who is exempt in 2026, and how to avoid fake application sites. gezi Ahmet Balaman