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". …
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?
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, …
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) …
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,
Pilot Skills Testing - Airline Pilot Central Forums
Apr 15, 2023 · American - Pilot Skills Testing - Hi All, Im in the process of completing an AA Application, Can anyone recommend the best source to prep for the PST online assessment?
On a spreadsheet what does A:A and !A:A mean? - Stack Overflow
N:N means that the range includes the whole column N, rather than just certain cells (e.g. N1:N300). This allows a formula to reference all data in the column even if you add more rows …
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 …
Access files in /var/mobile/Containers/Data/Application without ...
Jun 27, 2016 · A program logs some message in directory /var/mobile/Containers/Data/Application on iPhone. Is there any way I can get access to this …
AA senior and junior bases? - Airline Pilot Central Forums
Feb 5, 2020 · American - AA senior and junior bases? - Tried a quick search, but did not find anything current on the topic. I am trying to find out which AA bases are senior and which are …