Ruby Regular Expression Case Insensitive

I makes the regex match case insensitive.

Ruby regular expression case insensitive.

Ruby indeed uses m whereas perl and many other programming languages use s for dot matches newlines. In the following example we have a serial code with an initial letter that tells us how risky this product is to consume. A specific sequence of. Your test string.

In other words your program will be able to tell. Regular expressions regex or regexp are extremely useful in extracting information from any text by searching for one or more matches of a specific search pattern i e. Case serial code when ac low risk when al medium risk when ax high risk else unknown risk end when not to use ruby case. Abc i and inline or embedded e g.

I case insensitive m make dot match newlines x ignore whitespace in regex o perform substitutions. While reading the rest of the site when in doubt you can always come back and look here. Think about an email address with a ruby regex you can define what a valid email address looks like. By default the comparison of an input string with any literal characters in a regular expression pattern is case sensitive white space in a regular expression pattern is interpreted as literal white space characters and capturing groups in a regular expression are named implicitly as well as explicitly.

I abc the most common modifiers are global case insensitive multiline and dotall modifiers. It s a handy way to test regular expressions as you write them. M makes the dot match newlines. Wrap words show invisibles.

47 minutes to read 11. Ruby case regex. Rubular is a ruby based regular expression editor. A ruby regular expression editor.

Ruby supports the following modifiers. O causes any substitutions in a particular regex literal. You can also use regular expressions as your when condition. X tells ruby to ignore whitespace between regex tokens.

The tables below are a reference to basic regex. Constructs a new regular expression from pattern which can be either a string or a regexp in which case that regexp s options are propagated and new options may not be specified a change as of ruby 1 8.