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Why do keys matter in React, and how do they improve performance?
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Part 1 — The Era of the Stack Reconciler
The High-Level Process Deep Diving into the Reconciliation Process 1. The Trigger: this.setState this.setState is the “go” signal. React immediately begins the...
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SwiftUI View Diffing & Reconciliation
SwiftUI doesn’t “redraw the screen”. It diffs view trees. If you don’t understand how SwiftUI decides what changed vs what stayed the same, you’ll see unnecessa...
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FINTECH 101 — HOW TRANSACTIONS REALLY WORK
The Core Mental Model Four pillars: 1. Transaction statuses 2. Callbacks / Webhooks 3. Reconciliation & Status Enquiry 4. Retries, reversals & idempotency If y...