RegEx Please paste your commands after each question You are to define a pattern

Question

RegEx

Please paste your commands after each question

You are to define a pattern for each requirement

Build a pattern for the word “license”, even if it is misspelled by mixing up the “c” and the “s”

Define a pattern to find the number 21 followed by a single lower- or uppercase letter

Define a pattern to find two uppercase letters in a row, followed by a single digit, followed by one lowercase letter

Build a pattern to find a number from 3 to 7:

An uppercase “X”, followed by any two digits

Letter X not followed by “a” or “o”:

At least one non-alphabetic character

Letter “H” followed by any letter from “a” to “z”

A single upper- or lowercase followed by a single digit, followed by a lowercase letter

Build a pattern to a Canadian postal code. These codes have the format “letter number letter space number letter number”, where all the letters are uppercase, for example, M5P 3G4

Define a pattern to find Uppercase letter “H” followed by zero or more lowercase letters

Define a pattern to “error” followed by zero or more characters, followed by “code”

Build a pattern to find a colon, followed by zero or more occurrences of any other characters, followed by another colon

Build a pattern to find the letters “variable” followed by one or more numbers

Build a pattern to match either an uppercase “V” or lowercase “v” at the beginning of the above pattern

Word “color” (American spelling) or “colour” (British spelling)

Match exactly 3 digits

Match at least 3 digits

Match 5 or fewer digits

Match 3 to 5 digits

Match any of the following words: cat, dog, bird, hamster

Match any of the following complete words: cat, dog, bird, hamster

Explanation / Answer

1Q.Build a pattern for the word “license”, even if it is misspelled by mixing up the “c” and the “s”

Ans:pattern="li[cs]en[cs]e";

2Q.Define a pattern to find the number 21 followed by a single lower- or uppercase letter

Ans:pattern="21[a-zA-Z]";

3Q.Define a pattern to find two uppercase letters in a row, followed by a single digit, followed by one lowercase letter

Ans:pattern="[A-Z]{2}[0-9][a-z]";

4Q.Build a pattern to find a number from 3 to 7:

Ans:pattern="[3-7]";

5Q.An uppercase “X”, followed by any two digits

Ans:pattern="X[0-9]{2}";

6Q.Letter X not followed by “a” or “o”:

Ans:pattern="X[^ac]";

7Q.Letter “H” followed by any letter from “a” to “z”

Ans:pattern="H[a-z]";

8Q.A single upper- or lowercase followed by a single digit, followed by a lowercase letter

Ans:pattern="[a-zA-Z][0-9][a-z]";

9Q.Build a pattern to a Canadian postal code. These codes have the format “letter number letter space number letter number”, where all the letters are uppercase, for example, M5P 3G4

Ans:pattern="[A-Z][0-9][A-Z]s[0-9][A-Z][0-9]";

10Q.Define a pattern to find Uppercase letter “H” followed by zero or more lowercase letters

Ans:pattern="H[a-z]*";

11Q.Define a pattern to “error” followed by zero or more characters, followed by “code”

Ans:pattern="error.*code";

12Q.Build a pattern to find a colon, followed by zero or more occurrences of any other characters, followed by another colon

Ans:pattern=";.*;";

13Q.Build a pattern to find the letters “variable” followed by one or more numbers

Ans:pattern="variable[0-9]+";

14Q.Build a pattern to match either an uppercase “V” or lowercase “v” at the beginning of the above pattern

Ans:pattern="^{[a-z]|[A-Z]}";

15Q.Word “color” (American spelling) or “colour” (British spelling)

Ans:pattern=" colou?r";

16Q.Match exactly 3 digits

Ans:pattern="[0-9]{3}";

17Q.Match at least 3 digits

Ans:pattern="[0-9]{3,}"

18Q.Match 5 or fewer digits

Ans:pattern="[0-9]{0,5}";

19Q.Match 3 to 5 digits

Ans:pattern="[0-9]{3,5}";

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