Java Blog - Java News and Learning posts on CodeGym

Oleksandr Miadelets Random
October 23, 2026 at 8:38 PM
Python sort() vs sorted(): The Difference and How to Sort Lists, Dictionaries, and Objects Why your variable turns into None after .sort(), how to sort by multiple keys, sort a dictionary by value, ignore case, and where sorting breaks on accented letters. Every example is tested, and we measured the speed ourselves.
10/23/26
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Oleksandr Miadelets Random
October 23, 2026 at 8:14 PM
Bankers Are Horrified: AI Agents Are Running Loose in Customer Accounts. Why JPMorgan Is Kicking Them Out and How to Give an Agent Access the Right Way People are handing their bank logins to AI agents, and banks are finding agents in accounts doing things nobody asked them to do. Here's what's going on, why a password is the worst way to delegate access, and what the right way looks like.
10/23/26
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Oleksandr Miadelets Random
October 21, 2026 at 4:56 PM
Claude Code Deleted 116 GB of a User's Data: What Happened and How to Use AI Coding Agents Safely An AI agent wiped a developer's home folder, stopped the command, checked that everything was still there — and got it wrong. Here's how it happened, and six Claude Code settings that would have saved the data.
10/21/26
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Oleksandr Miadelets Random
October 15, 2026 at 9:39 AM
Best Books for Backend Developers: 9 Books for Real Backend Problems What to read as a backend developer when a query is slow, data keeps growing, a service goes down, or a system design interview is coming up. Nine books for specific problems — and the AI mistakes you'll start catching after each one.
10/15/26
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Oleksandr Miadelets Random
October 8, 2026 at 7:12 PM
How AI Agents Work: The Agent Loop, Skills, MCP, Subagents, and Hooks Explained What an AI agent like Claude Code is actually made of: the agent loop, skills, MCP, subagents, and hooks — in plain English, with code examples and five real stories where each piece failed.
10/8/26
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Oleksandr Miadelets Random
October 5, 2026 at 11:45 AM
Best Movies and TV Shows for Programmers: 25 Picks About Coding, Hackers, and AI Through a developer's eyes: where movies get code right, where they get it so wrong it's funny, and which scenes turned out to be real. Startup and hacker shows, AI films, documentaries, and a "what to watch for your mood" table.
10/5/26
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Oleksandr Miadelets Random
September 30, 2026 at 6:11 PM
Python Developer Roadmap 2026: What to Learn, in What Order, and Where Everyone Stalls The GIL is switchable now, pip lost its crown to uv, and the bar for getting in has moved — but the door is open, and it leads further than it did a couple of years ago. Here's the route from an empty file to architectural decisions: what to learn at each level, how to know a level is actually done, and what AI now does for you.
9/30/26
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mr.Robot Random-SK
September 30, 2026 at 2:11 PM
Čo mení model na agenta Claude Code nie je model, ale obal okolo neho: nástroje, kontext, povolenia a pracovný cyklus. Pozrime sa, z čoho sa skladá, prečo sa ten istý model správa v rôznych programoch odlišne a čo upraviť, keď agent opakovane robí chyby.
9/30/26
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mr.Robot Random
September 30, 2026 at 2:11 PM
What turns a model into an agent Claude Code isn't a model, it's the harness around one: tools, context, permissions, the working loop. We'll look at what the harness is made of, why the same model behaves differently in different programs, and what to fix when the agent keeps making the same mistake.
9/30/26
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mr.Robot Random-CS
September 30, 2026 at 2:11 PM
Co z modelu dělá agenta Claude Code není samotný model, ale obal kolem něj: nástroje, kontext, oprávnění a pracovní cyklus. Podíváme se, z čeho se skládá, proč se stejný model chová v různých programech odlišně a co upravit, když agent opakovaně chybuje.
9/30/26
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mr.Robot Random-AZ
September 30, 2026 at 2:11 PM
Modeli agentə nə çevirir Claude Code model deyil, onun ətrafındakı harness-dir: alətlər, kontekst, icazələr və iş dövrü. Onun nələrdən ibarət olduğunu, eyni modelin müxtəlif proqramlarda niyə fərqli davrandığını və agent təkrar-təkrar səhv edəndə nəyi dəyişməli olduğunuzu araşdıraq.
9/30/26
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mr.Robot Random-SK
September 30, 2026 at 8:54 AM
Ako rozdeliť prácu medzi viacerých vykonávateľov Dvaja vykonávatelia nedokončia prácu dvakrát rýchlejšie len preto, že sú dvaja. Pozrime sa, ako zistiť, či má zmysel rozdeliť úlohu, ako rozdeliť oblasti kódu a spoločné dohody a ako overiť výsledok po spojení.
9/30/26
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