Regular Expression¶
How To: Basic::Regular Expression
Check for certain set of characters- Match ‘a’ followed by zero or more chars
- Match ‘a’ followed by one or more chars
- Match ‘a’ followed by zero or one char
- Match ‘a’ followed by 3 chars
- Match ‘a’ followed by anything, and ending in ‘b’
- Find sequences of joined lowercase letters
- Find sequences of one upper case letter
- Match ‘ab’ followed by two to three chars
- Match a word at the beginning
- Match a word at end of string with optional punctuation
- Match a word containing ‘z’
- Match a word containing ‘z’, not start or end of the word
- Search only upper and and lowercase, numbers, and underscores
- Match string started with a specific number
- Remove leading zeros from an IP address
- Check for a number at the end of a string
- Search the numbers (0-9) of length between 1 to 3
- Search some literals strings in a string
- Search a literals string in a string and pattern location
- Find the substrings within a string
- Find the occurrence and position of the substring
- Replace whitespaces with an underscore
- Extract year, month and date from an URL
- Convert a date of yyyy-mm-dd format to dd-mm-yyyy format
- Match if two words from a list starting with letter ‘P’
- Separate and print the numbers of a given string
- Find all words starting with ‘a’ or ‘e’
- Separate the numbers and get their position
- Replace (abbreviate) ‘road’ as ‘rd.’
- Replace all occurrences of characters
- Replace max 2 occurrences of characters with a colon
- Find all five characters long word in a string
- Find all 3, 4, and 5 characters long words
- Find all words which are at least 4 characters long
- Convert camel case string to snake case string
- Convert snake case string to camel case string
- Extract values between quotation marks
- Eliminate duplicate whitespaces
- Remove all whitespaces from a string
- Remove everything except alphanumeric chars
- Find URLs
- Split a string at uppercase letters
- Do a case-insensitive string replacement
- Remove the ANSI escape sequences
- Find all adverbs and their positions
- Split a string with multiple delimiters
- Check a decimal with a precision of 2
- Remove words from a string of length between 1 and N
- Remove the parenthesis area
- Insert spaces between words