#lookbehind
Live, measured metrics for the hashtag #lookbehind from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #lookbehind
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · mastodon.online (Mastodon public tags API) · fetched 2026-09-15 21:34 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mastodon.online (Mastodon public search API) · fetched 2026-09-15 21:34 UTCLive pulse
measured · mastodon.online (Mastodon tag timeline) · fetched 2026-09-15 21:34 UTCEverything below is measured over the latest 1 public posts.
Posting hours (UTC)
Languages: German (1)
Avg boosts / post: 0
Used together with
Top of the latest posts
Die #InDesigns #GREP-Engine kann im #Lookbehind nur eine fest definierte Anzahl von Zeichen prüfen – nicht eine beliebige Länge. Wenn man beispielsweise schließende Klammern nur dann finden möchte, wenn davor ein beliebig langer Text steht,
What “lookbehind” means
WikipediaPerl Compatible Regular Expressions (PCRE) is a library written in C, which implements a regular expression engine, inspired by the capabilities of the Perl programming language. Philip Hazel started writing PCRE in summer 1997. PCRE's syntax is much more powerful and flexible than either of the POSIX regular expression flavors and than that of many other regular-expression libraries.
“Perl Compatible Regular Expressions” on Wikipedia (CC BY-SA) →#lookbehind across platforms
every network with a public tag surfaceFollow #lookbehind straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/lookbehind