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JSON's \n is two characters in the file (backslash + n) that parse to one character (line feed) — and when encoding is applied in the wrong order or twice, you get literal \n in displayed output, double-escaped \\u sequences, or & where & should be. Here's the three encoding layers that commonly stack incorrectly, the specific corruption patterns and their causes, and why \/ appears in some JSON (HTML injection defence in script tags).

SHA-3 was developed alongside SHA-2 — not because SHA-2 was broken, but as a precautionary hedge using a completely different design. SHA-2 uses Merkle-Damgård construction; SHA-3 uses a sponge construction. Here's the architectural difference, why Merkle-Damgård is vulnerable to length extension attacks (and how HMAC fixes it), why SHA-3 is immune to this by design, and a 2024 guide to which hash function to use for what purpose.

Learn how text diff works, the difference between line, word, and character diff modes, how to read unified diff format, and when to use a text diff tool for documents, code, and configuration files.

"Inflation is 3%" and "my expenses rose 8%" can both be true at once — because official CPI is a weighted average across a standardized basket, and your spending pattern almost certainly doesn't match that average. Here's why housing-heavy, food-heavy, or energy-heavy budgets systematically diverge from headline figures, the shrinkflation and hedonic-adjustment perception gaps, and how to build a rough "personal inflation rate" using your own category weights.

Deduplication is a business logic decision masquerading as a technical one — "duplicate" means different things for contact lists (same email, different fields) vs URL lists (case sensitivity, trailing slashes) vs product catalogs (same SKU, different descriptions). Here's the exact vs near-duplicate distinction, normalization as the preprocessing step that determines deduplication quality, CRM merge strategies, and URL-specific case sensitivity rules.

GPTBot, ClaudeBot, Google-Extended, and a growing list of AI training crawlers now require active robots.txt management. Here's every major AI crawler and its user agent, how to block them selectively, the distinction between blocking Google-Extended vs Googlebot, and what "respect robots.txt" actually means in practice.

Learn how hash functions work, the differences between MD5, SHA-1, SHA-256, and SHA-3, which algorithm to use for file verification vs. passwords, and how to generate hashes instantly with a free tool.

RD interest rates are fixed at opening and don't change with RBI rate moves — which means the tenure decision is really a rate-direction bet. In a rising rate environment, shorter tenures preserve flexibility to re-invest at higher rates; in a falling environment, longer tenures lock in peak rates. Here's how RBI monetary policy transmits to bank deposit rates, the RD laddering strategy for both flexibility and rate optimisation, and premature withdrawal penalty mechanics.

Some large studies find the lowest mortality in the "overweight" BMI band. The explanation is mostly confounding and reverse causation — here's how to read those findings.

A missing PTR record silently degrades email deliverability. Here's how forward-confirmed reverse DNS works, why it matters for email authentication, who controls PTR records, and how reverse DNS is used in security investigation.