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Understanding and Testing Regular Expressions

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Your Turn

Navigate to rubular, regex101, regexr, or regexpal and familiarize yourself with the user interface.

Input the following text into the test string field:

2 cups whole milk 1 cup white rice (uncooked) 1 pinch salt 1/2 cup water 1/4 cup dark brown sugar

Write regular expressions (one at a time) to match the wet ingredients and look at the match results.

Learn More

In addition to the regex testing websites above, you might be interested in the regexplain package.

Another approach to doing regex in R is to use the str_view() function from the stringr package, which shows you matches in a string.

Have any questions? Put them below and we will help you out!

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