Results for “encoding”

Bytes to lowercase hexadecimal text and back (RFC 4648 base16), strictly, identically in every language.

Text to UTF-8 bytes and strictly back (RFC 3629), so hashing and signing see the same bytes in every language.

Bytes to base64 and base64url text and back (RFC 4648), with strict decoding, identically in every language.

The SHA-256 digest of a byte string (FIPS 180-4), in pure code that also runs in the browser.

Sign, verify and decode HS256 JSON Web Tokens (RFC 7519): signature, algorithm and exp/nbf/iat checked with leeway.

PBKDF2 with HMAC-SHA256 (RFC 8018): derive a key from a password and salt, slowly, fast enough for a login request.

Hash a password for storage as pbkdf2_sha256$iterations$salt$hash, verify one in constant time, and spot weak hashes.

Parse one Apache/NCSA Common or Combined Log Format access log line; null for a line in neither format.

Build an 18-digit SSCC pallet label number from extension digit, GS1 company prefix and serial, with its check digit.

Hex colours to RGB and back, and sRGB channels to linear light and back, identically in every language.

Compare two byte strings in time that does not depend on where they differ, for checking MACs and hashes.

Find timetable clashes: overlapping sessions that share a room, a teacher or a student group, in a fixed order.

HMAC-SHA256 of a message under a secret key (RFC 2104, RFC 4231), in pure code that also runs in the browser.

Write todos as a CSV file (RFC 4180) with one column per field, for backups, spreadsheets and other apps.

Initials from a personal name for avatars and signatures: "Jean-Paul Sartre" is "JPS".

Turn a title into a lowercase ASCII URL slug, transliterating common accented Latin letters.

Tidy a personal name: trim, collapse whitespace and title-case, with Mc, Mac, O', hyphen and van/de rules.

Construction Industry Scheme deduction (0, 20 or 30%) on the labour part of a subcontractor payment.

Spell out a whole number in British English words, with "and" the way a cheque writes it.

Retention held and released on a construction valuation: full rate, half at practical completion, none at the end.

Overall equipment effectiveness (availability x performance x quality) in basis points, from times and counts.

Ration costing and dry matter intake from each feed's fresh weight, DM % and price per tonne, in exact money.

Mask all but the last n characters of a card, account or phone number, optionally keeping separators.

Interim valuation: gross value to date, retention, previous payments, amount due, VAT or reverse charge, and CIS.

Classify an IPv4 or IPv6 address as loopback, private, link-local, multicast, documentation, CGNAT or global.

Early settlement figure and rebate on UK regulated consumer credit, per the Early Settlement Regulations 2004.

English text for a repeating todo's chip: "Every weekday", "Every 2 weeks on Monday", "Every month on the 31st".

Filter records by a case-insensitive substring match across named fields, in input order.

Check the format of a commodity code: 6-digit HS, 8-digit CN or 10-digit TARIC/UK code, with chapter and heading checks.

The colour at a point along a sequential or diverging ramp, mixed in OKLab so steps look even; hex in, hex out.

A vehicle's current value from its cost, age and mileage, on retention curves the caller supplies, exactly.

Shorten text to a maximum length on a word boundary and add an ellipsis, counting Unicode code points.

Workplace pension contributions for one pay period: qualifying earnings band, employee and employer shares, tax relief.

Check a 20-character Legal Entity Identifier against its ISO 17442 / ISO 7064 MOD 97-10 check digits.

Validate a MAC address in colon, hyphen, Cisco dot or bare form and normalise it, with multicast and local bits.

Convert length, mass, area, volume, temperature and energy between units, exactly, as decimal text.

Trim an email address and lower-case its domain for storage and lookup, or null if it is not a plausible address.

Summarise probe results: sent, received, loss, min/avg/max, p95 and jitter, in whole microseconds.

Rate a call from a rate deck: longest-prefix destination match, billing increments, connection fee and minimum charge.

kgCO2e from kWh or litres of a fuel, using the UK government GHG conversion factors for the year.

Demurrage or detention charge for a container: free days, then a tiered daily rate from the carrier's tariff.

UK honours degree class (First, 2:1, 2:2, Third) from module marks and credits, weighted by level.

Grade point average on a 4.0 scale from letter grades and credit hours, weighted by credits and rounded once.

The words and figures to write on a cheque: "One hundred and twenty pounds and fifty pence only", "£120.50".

Who pays which costs and where risk passes under an Incoterms 2020 rule, from EXW to DDP, FOB and CIF.