Ruby Regex Syntax

You have seen a simple ruby program now let us see a few basic concepts related to ruby syntax.

Ruby regex syntax.

Syntax pattern pattern im option can be specified r usr local. When one operand is a regular expression and the other is a string then the regular expression is used as a pattern to match against the string. Whitespace characters such as spaces and tabs are generally ignored in ruby code except when they appear in strings. Ruby regular expressions ruby regex for short help you find specific patterns inside strings with the intent of extracting data for further processing two common use cases for regular expressions include validation parsing.

A regular expression literal is a pattern between slashes or between arbitrary delimiters followed by r as follows. A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings using a specialized syntax held in a pattern. Is ruby s basic pattern matching operator. In ruby a pattern is written between forward slash characters.

They describe the content of a string. Sometimes however they are used to interpret ambiguous statements. The next column legend explains what the element means or encodes in the regex syntax. General delimited regular expression.

The next two columns work hand in hand. Think about an email address with a ruby regex you can define what a valid email address looks like. Other classes may have different. Ruby regular expression is more similar to perl regular expression.

On each line in the leftmost column you will find a new element of regex syntax. In other words your program will be able to tell. This operator is equivalently defined by regexp and string so the order of string and regexp do not matter.