2016年8月15日 · How do I create a regular expression that detects hexadecimal numbers in a text? For example, ‘0x0f4’, ‘0acdadecf822eeff32aca5830e438cb54aa722e3’, and …

2024年7月25日 · The POSIX Basic Regular Expression (BRE) syntax provided extensions to achieve consistency between utility programs such as grep, sed and awk. These extensions …

2025年3月26日 · Matches the preceding element one or more times. For example, ab\+c (in BRE) or ab+c (in ERE) matches "abc", "abbbc", etc., but not "ac", [xyz]\+ (in BRE) or [xyz]+ (in ERE) …

2015年3月19日 · With bash (or any shell, provided the printf command is available (a standard POSIX command often built in the shells)): printf '%x\n' 85 With zsh, you can also do: dec=85 …

2019年11月27日 · Fortunately, you can just ignore it all and use your shell's arithmetic substitution instead (bash and other Posix compliant shells will work, as well as some non-Posix shells). …

2024年4月29日 · I would like to match a hexadecimal address of fixed length using a regex pattern in sed. For example: 0x000000010b2e993c. 0x is always present followed by the …

Characters that are hexadecimal digits. For example, before the POSIX standard, to match alphanumeric characters, you had to write /[A-Za-z0-9]/. If your character set had other …

2013年2月20日 · I wish to accept hex characters only, case doesn't matter, so [0-9a-fA-F] but I only want to accept strings between 10 and 64 characters, what is the best way to do this …

The command hex is one of several data encodings provided by the package trf. See trf-intro for an overview of the whole package. This encoding transforms every byte in the input into a …

POSIX character classes are predefined sequences for a certain set of characters. Additional character classes my be available depending on the implementation and/or locale. Letters, …