Ruby Regular Expression Case Insensitive

Wrap words show invisibles.

Ruby regular expression case insensitive. Rubular is a ruby based regular expression editor. A ruby regular expression editor. While reading the rest of the site when in doubt you can always come back and look here. You can also use regular expressions as your when condition.

Ruby case regex. I case insensitive m make dot match newlines x ignore whitespace in regex o perform substitutions. 47 minutes to read 11. I makes the regex match case insensitive.

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. 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. 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. O causes any substitutions in a particular regex literal.

Abc i and inline or embedded e g. Think about an email address with a ruby regex you can define what a valid email address looks like. The tables below are a reference to basic regex. 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.

In other words your program will be able to tell. It you want a bookmark here s a direct link to the regex reference tables i encourage you to print the tables so you have a cheat sheet on your desk for quick reference. Regular expression patterns are often used with modifiers also called flags that redefine regex behavior regex modifiers can be regular e g. Ruby indeed uses m whereas perl and many other programming languages use s for dot matches newlines.

A specific sequence of. In the following example we have a serial code with an initial letter that tells us how risky this product is to consume. X tells ruby to ignore whitespace between regex tokens. Ruby supports the following modifiers.

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.