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I'm building a journal app in Kotlin Multiplatform and for this purpose I have created a zoomable timeline interface. This is a side-project where I reuse the timeline interface to display 4 million events imported from Wikipedia / Wikidata, scored using PageRank. There is more information on the about page. If you're interested in the stack: I use Kotlin Multiplatform extensively, with Compose Multiplatform for the UI, communicates with the backend using Kotlinx-RPC and behind the hood a simple

Welcome to Day 5! Today we shift from volatile, temporary in-memory variables to persistent storage and application durability . You will learn how to interact safely with your operating system's file system, read/write structured industry data patterns, handle real-world operational crashes gracefully, and keep execution timelines documented using professional logging architectures. 💾 1. File Handling & pathlib 📄 Python's pathlib module treats file paths as smart object structures instead of plain text strings. This avoids bugs caused by differing slash directions across operating systems (Windows uses \ , while Mac/Linux use / ). Reading ( "r" ): Loads file contents into memory. Writing ( "w" ): Erases any existing file contents and writes a fresh payload from scratch. Appending ( "a" ): Targets the end of a file, adding fresh text without overwriting existing contents. 🌱 Easy Starter Example from pathlib import Path # Create a path reference pointing to a file in the current workspace directory file_path = Path ( " notes.txt " ) # Write text cleanly to a file space file_path . write_text ( " Hello from Day 5! " ) # Read data straight back into a string variable content = file_path . read_text () print ( content ) # Output: Hello from Day 5! 🏛️ Real-World Example: Multi-Platform System Telemetry Appender from pathlib import Path from datetime import datetime def log_system_status ( status_message : str ) -> None : # Resolve home folder pathways seamlessly across Windows, Mac, or Linux systems target_dir = Path . home () / " app_workspace " / " telemetry " # Create the directory chain automatically if it doesn't exist yet target_dir . mkdir ( parents = True , exist_ok = True ) log_file = target_dir / " runtime_events.log " timestamp = datetime . now (). isoformat () # Secure stream channel using Python's standard file-open context manager with open ( log_file , mode = " a " , encoding = " utf-8 " ) as file : file . write ( f " [ { timestamp } ] STATUS: { status_mes

Event uploads fail differently from normal office uploads. A wedding guest may move between venue Wi-Fi and mobile data, lock the phone while a video is transferring, or close the browser as soon as the progress bar reaches 100%. Hundreds of devices can share one access point, and users rarely wait around to diagnose an error. The usual POST request plus optimistic success toast is not enough. A reliable browser flow needs a small protocol that distinguishes local preparation, network transfer, server acceptance, media processing, and final availability. This article describes a platform-neutral design for that protocol. The five states users actually experience Model each file as a durable state machine: selected -> preparing -> transferring -> accepted -> processing -> ready Add terminal or recoverable branches: preparing -> rejected_local transferring -> paused | retryable_error | expired accepted -> processing_error processing -> ready | processing_error The key distinction is between transferring and accepted . The browser may have sent every byte while the server has not yet committed the upload. Showing “done” at that boundary creates the most frustrating failure: the guest deletes the original, but the organizer never receives it. Give every file a client-generated identity Create an upload ID before the first network request. A UUID is sufficient when combined with the event identifier: const uploadId = crypto . randomUUID (); const uploadIntent = { uploadId , eventId , name : file . name , size : file . size , type : file . type , lastModified : file . lastModified , }; Send that identity when creating the server-side upload session. If the browser retries after a timeout, the server returns the existing session instead of creating a duplicate. This is idempotency at the workflow level. A guest can tap “retry” without having to understand whether the first request reached the server. Separate the control plane from file bytes Use a small JSON API for sessi

The prediction market’s Panamanian operation seems odd, even for a company whose CEO had his apartment raided by FBI agents.

This is Part 7 of 10 , a bonus practice article containing 75 coding interview questions drawn from the React Native Interview Handbook. It covers the implementation tasks commonly used in JavaScript and React Native rounds, from string and array problems to hooks, FlatList , asynchronous work, caching, retries, and native modules. Complete series This Dev.to series has five core handbook articles plus five focused practice extras. Open the series page to move through the complete reading order: Part 1: JavaScript — core handbook, questions 1–120 Part 2: React — core handbook, questions 121–220 Part 3: React Native — core handbook, questions 221–420 Part 4: Performance & Architecture — core handbook, questions 421–560 Part 5: Senior & System Design — core handbook, questions 561–719 Part 6: Output-Based JavaScript Practice — bonus practice article Part 7: Coding Interview Practice — bonus practice article Part 8: Code Output Challenges — bonus practice article Part 9: Current React Native Interview Questions — new high-frequency practice article Part 10: Project & Production Interviews — senior project ownership and real-production practice How to answer coding questions Before coding, clarify inputs, output, edge cases, platform constraints, time complexity, space complexity, cancellation, and test coverage. Start with a correct readable solution, then optimize only when the constraint justifies it. Topics covered Strings, arrays, maps, sets, recursion, and algorithmic complexity Debounce, throttle, memoization, deep cloning, and polyfills Custom hooks, API state, error boundaries, and React rendering FlatList pagination, pull to refresh, search, and offline retry Promises, timeouts, concurrency limits, and exponential backoff Caching, EventEmitter, Pub/Sub, LRU design, and native module boundaries Interview coding checklist Confirm assumptions before writing code. State time and space complexity. Handle empty input, invalid input, and duplicate values deliberately

This is Part 6 of 10 , a bonus practice article containing 191 output-based JavaScript interview questions . It includes 111 questions drawn from the React Native Interview Handbook plus 80 additional questions on the JavaScript behavior interviewers commonly test in React Native rounds: hoisting, scope, closures, arrays, objects, functions, coercion, conditions, Promises, and the event loop. Complete series This Dev.to series has five core handbook articles plus five focused practice extras. Open the series page to move through the complete reading order: Part 1: JavaScript — core handbook, questions 1–120 Part 2: React — core handbook, questions 121–220 Part 3: React Native — core handbook, questions 221–420 Part 4: Performance & Architecture — core handbook, questions 421–560 Part 5: Senior & System Design — core handbook, questions 561–719 Part 6: Output-Based JavaScript Practice — bonus practice article Part 7: Coding Interview Practice — bonus practice article Part 8: Code Output Challenges — bonus practice article Part 9: Current React Native Interview Questions — new high-frequency practice article Part 10: Project & Production Interviews — senior project ownership and real-production practice How to use this guide Before opening an answer, state the exact output first. Then explain the rule that causes it: evaluation order, scope, coercion, reference identity, prototype lookup, or microtask scheduling. Run the snippet only after committing to an answer. Topics covered Hoisting, Temporal Dead Zone, var , let , const , and function declarations Scope, closures, this , arrow functions, call , apply , and bind Arrays, sparse arrays, map , reduce , sort , slice , splice , and mutation Objects, references, shallow copies, prototypes, getters, and property lookup Conditions, truthiness, equality, nullish coalescing, and type coercion Promises, async / await , microtasks, timers, and error recovery React and React Native rendering behavior, state updates, effects,

AI Crypto Investigations/Research Agents Discussion | Link

Looks like it happened. I actually assumed they would just enable it for all today, considering the Sol and Kimmi releases this past week. They doubled down instead. EDIT: Was an outage, they just fixed it (https://status.claude.com/)

Apple Music is more expensive now. In the US, an individual plan now costs $11.99 per month, a $1 bump up from the previous $10.99 price. A family plan now costs $19.99 per month, up from $16.99, and a student plan costs $6.99 per month, up from $5.99. Apple, in a statement to Music Business […]

Camera upgrades in the Z Flip 8, Fold 8 and Fold 8 Ultra appear to be slim.

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Designed for year-round comfort, the Dyson Hot+Cool HF1 combines quiet operation and simple controls with Dyson's signature bladeless design.

A newly renewed, $25 million-per-year contract with a subsidiary of Thompson Reuters further expands the power of ICE under the Trump administration.

Toss out a brick to lure a jade gem. — The 36 Stratagems, Throw Out a Brick to Get a...