Pick IDs correctly - uuid4 unsorted, uuid1 leaks MAC, ULID order within a millisecond, UUID parse forms, uuid5 deterministic, secrets tokens

Fix strict TypeScript errors - TS18046 unknown, TS2339 unions, TS2540 as const, TS2353 excess props, TS18048 index access, never exhaustiveness

Count LLM tokens with tiktoken - chars vs tokens table, emoji and digits cost, chunk by tokens with overlap, prompt budget formula

Python numeric gotchas run live - round half even, floor division with negatives, truthiness traps, is vs ==, Decimal rounding

Convert an IPv4 start and end address into the minimal list of CIDR blocks, with the first and last address and size of each block

Paper impact for PubMed IDs from NIH iCite - citations, Relative Citation Ratio, NIH percentile, expected rate, clinical flags and translation potential

IPv6 address tool - expanded and compressed forms, address type, private check, reverse DNS name and for a prefix the range, size and /64 subnet count

Fossil taxon facts from the Paleobiology Database - rank, authority, first and last appearance in millions of years, fossil occurrences and classification

Is this token a scam? Send any token address on Base, Ethereum, BNB, Arbitrum, Polygon, Optimism or Solana for a verdict, 0-100 score, honeypot and rug check.

Payoff of any option strategy from its legs - max profit, max loss, breakeven prices, net debit or credit and a payoff table at expiry for spreads and condors

Search the current Code of Federal Regulations - CFR citation, part and section, heading, text excerpt, effective date and link, filterable by title

Search US court opinions on CourtListener - case name, court, filing date, reporter citations, docket number, times cited, snippet and link

Fix React useEffect infinite loops and stale closures - dependency arrays, unstable objects, functional updates, cleanup and Strict Mode double runs

Exact combinatorics with big integers - factorial, nPr, nCr, combinations with repetition, derangements and Catalan numbers for n up to 2000

Search Figshare research outputs - datasets, code, papers, posters and theses with title, DOI, type, publication date and link, newest first

Rent-vs-buy monthly screen - mortgage, tax, insurance, maintenance and HOA compared with rent

Search NASA Earth science datasets in the CMR - title, short name, version, data center, platforms, time range, spatial extent and landing page

Perpetual futures liquidation price for a long or short at any leverage, with the percent move to liquidation, margin, position size and loss at liquidation.

Projectile motion with no drag: range, flight time, peak height, impact speed and angle, the optimal range angle and a trajectory table, with launch height.

Password strength estimate - entropy bits, 0 to 4 score, offline and online crack time, common password and pattern penalties, with suggestions