Which of the following character classes match:
All lower case letters
All upper case letters
All numbers
What is a regular expression that matches all of the following headers:
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PAST MEDICAL HISTORY: |
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Past Medical History: |
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PREVIOUS MEDICAL HISTORY: |
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Past medical history: |
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PAST MEDICAL/SURGICAL HISTORY: |
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past medical history: |
Which of the following quantifiers means "match 0 or 1 times"?
If you are developing a regular expression in R and even though RegExr or Debuggex show it as correct it isn't working as you expect, what could be going wrong?
What quantifier would you use if you want to match a character 3, 4, or 5 times?
Using the radiology reports in Google BigQuery, how many notes have the word "unremarkable" in them?
What stringr function do you use when you want to replace all matching strings in a text? Make sure to include the parentheses - for example if the function you want to use was names "mutate", the correct answer would be "mutate()".
Which of the following are techniques you can use when working on a text processing problem?