Ruby Regular Expression Case Insensitive

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.

Ruby regular expression case insensitive.

I makes the regex match case insensitive. Think about an email address with a ruby regex you can define what a valid email address looks like. Ruby supports the following modifiers. 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. The tables below are a reference to basic regex. While reading the rest of the site when in doubt you can always come back and look here. In other words your program will be able to tell.

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. It s a handy way to test regular expressions as you write them. Rubular is a ruby based regular expression editor. X tells ruby to ignore whitespace between regex tokens.

A specific sequence of. Your test string. Wrap words show invisibles. 47 minutes to read 11.

You can also use regular expressions as your when condition. Ruby case regex. Abc i and inline or embedded e g. Ruby indeed uses m whereas perl and many other programming languages use s for dot matches newlines.

A ruby regular expression editor. 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. 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 the following example we have a serial code with an initial letter that tells us how risky this product is to consume.

M makes the dot match newlines. Regular expression patterns are often used with modifiers also called flags that redefine regex behavior regex modifiers can be regular e g.