How does the regular expression " (aa)+\1" match "aaaaaa"?
Aug 24, 2013 · The \1 refers to the captured group, which is the same thing the quantifier is referring to. So effectively, it's saying "group aa, 1 or more times, and then one more time". …
American - Airline Pilot Central Forums
Oct 9, 2025 · American### It is against the APC Forum Rules to advocate any labor action which is not authorized by the RLA/NMB. This applies to ANY wildcat actions, including slowdown, …
RegEx for matching "A-Z, a-z, 0-9, _" and "." - Stack Overflow
Nov 12, 2009 · I need a regex which will allow only A-Z, a-z, 0-9, the _ character, and dot (.) in the input. I tried: [A-Za-z0-9_.] But, it did not work. How can I fix it?
r - CSVを読み込もうとすると「不正なマルチバイト文字がありま …
ExcelでCSV形式（UTF-8）で簡単なデータを作成（1行目が英字、以降数字）し、Rで read.csv ("ファイル名",header=T) で読み込もうとすると make.names (col.names, unique = TRUE) …
What does <![CDATA[]]> in XML mean? - Stack Overflow
I often find this strange CDATA tag in XML files: <![CDATA[some stuff]]> I have observed that this CDATA tag always comes at the beginning, and then followed by some stuff. But sometimes it …
AA Non-Rev travel - Airline Pilot Central Forums
May 20, 2019 · American - AA Non-Rev travel - I'm currently at SWA, but just received an offer to interview at AA. My wife was asking about the non-rev benefits at AA. I've heard they're pretty …
AA loses ORD gate lawsuit & hires DAL exec
Sep 29, 2025 · American - AA loses ORD gate lawsuit & hires DAL exec - American Airlines loses bid to block O'Hare gate redistribution A federal judge has sided with United and the City of …
What's so special about 0x55AA? - Stack Overflow
Oct 11, 2016 · I have encountered 0x55AA in 2 scenarios: the final 2 bytes of boot sector in the legacy booting process contains 0x55AA. the first 2 bytes of the Option ROM must be 0x55AA …
How to match 'aA1' or 'Aa1' or '1aA' with regex? - Stack Overflow
Aug 24, 2012 · Continue to help good content that is interesting, well-researched, and useful, rise to the top! To gain full voting privileges,
AA 2024 Class Drops - Airline Pilot Central Forums
Dec 5, 2023 · American - AA 2024 Class Drops - New thread for the 2024 class drops. I'm in 1/17 class. 10/25 CJO. Was told to expect "new hire packet" to be emailed "late November." …