When backtesting algorithmic trading strategies or building financial models in Python, the biggest bottleneck is almost always slow, iterative for loops over Pandas DataFrames. Whether you are running an intraday strategy on index options or scanning hundreds of equities, vectorizing…
The idea behind Row Level Security (RLS) is simple: instead of trusting your app to filter data, the database refuses to return rows the caller isn't allowed to see. This post takes RLS from "I've heard of it" to "I…
Base's Denim upgrade cuts block time from 2 seconds to 200 milliseconds. That gives you 10x the blocks, and any service that does work on every block makes 10x the RPC calls. That holds on every provider, because the chain sets the count, not…
On 2026-11-05, a count-only ZoomEye query with sub_type=all, page 1 and page size 1 returned 11,535 matches for app="Umami". The title query returned 18,762. Those results describe matching application surfaces and must be separated from the question of whether a share page or API…
Telegram consegna i messaggi in due modi. Un webhook richiede un URL HTTPS pubblico che Telegram possa chiamare. getUpdates non richiede di esporre nulla: lo script chiede i nuovi messaggi e, con timeout=25, Telegram tiene aperta la richiesta fino a…
The product also supports groups and permissions in its Pro documentation. A group can separate users who only consume apps from operators who can restart containers or open a terminal. The management interface, app URLs, and API tokens should not…
Le parentesi attorno alla query sono quelle che manda anche il sito. Senza uno user agent da browser l'endpoint tende più facilmente a rifiutare, quindi l'app ne invia uno, e così fa questa funzione. L'ultimo controllo prima del parsing è…
If you sell a Shopify app, a WordPress plugin or migration services, the most useful thing to know about a prospect is what their website runs on. The same goes for agencies doing audits and for anyone cleaning a lead…
When you’re building a voice‑driven app—whether it’s an interactive chatbot, an audiobook generator, or a personalized voice assistant—the latency you introduce can make or break the user experience. A few extra seconds of silence before the spoken…
On the first weekday of every month, the whoishiring account opens an "Ask HN: Who is hiring?" thread, and a few hundred companies post one comment each. It's one of the best job boards for developers, but it's a single…
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