2. Write a Regular expression that matches words, where a word is a series of ASCII...

2. Write a Regular expression that matches words, where a word is a series of ASCII alphabetic characters. Match both upper- and lowercase.

Note: Enter man grep to read about the options of grep.
Answer:

Expert Solution

Answer:

grep '[A-Za-z]*' sun.txt

Justification:

grep is the command used to match a regular expression.

[A-Za-z] matches the uppercase or lowercase alphabet from the ASCII characters.

* matches zero or more occurrences of the preceding pattern (i,e. [A-Za-z]* matches zero or more occurrences of words that start with lowercase or the uppercase ASCII characters.)

sun.txt is a file that the grep command looks in to match the given pattern.

sun.txt

Output:

The words marked in red color are the words matched by the regular expression given by us.

venereology answered 3 months ago

Write a regular expression, using the regular expression syntax used by lex, that matches any finite...

Write a regular expression, using the regular expression syntax used by lex, that matches any finite decimal representation of a nonnegative real number.

Create and test a python regular expression that matches a street address consisting of a number...

Create and test a python regular expression that matches a street address consisting of a number with one or more digits followed by two words of one or more characters each. The tokens should be separated by one space each, as in 123 Main Street.

1. What is a regular expression? Write a regular expression that will detect “College” and “collegE”....

1. What is a regular expression? Write a regular expression that will detect “College” and “collegE”. 2. What is degree centrality? Create a graph of 4 vertices and compute the degree centrality of the vertices. 3. Compute internal and external community densities for a graph containing 6 nodes. You can create any graph of 6 nodes with at least 4 edges.

Regular Expressions Assignment Write a regular expression for each of the following. Can you show output...

Regular Expressions Assignment Write a regular expression for each of the following. Can you show output please. A blank line (may contain spaces) Postal abbreviation (2 letters) for State followed by a space and then the 5-digit zip code A KU student username (Ex. lpork247) A “valid” email address (also explain how you defined “valid”) A SSN pattern (ddd-dd-dddd)

Question d) Write the regular expression statement that will match a string that starts with the...

Question d) Write the regular expression statement that will match a string that starts with the word "Warning" following by one space and then a number of any number of digits. Question e) Write the regular expression statement that will match a string that ends with the phrase "End of Report. Question f) Write the regular expression statement that will match a string that starts with the phrase "Begin Log:" then contains a collection of characters (other than newline) followed...

In C++, write a program that accepts a text file of ASCII words from standard input...

In C++, write a program that accepts a text file of ASCII words from standard input and store them and the amount of times the word appears in the file in a hash table using external chaining. Then print the words and their counts sorted based on alphabetical order and print them again in decreasing numerical order based on the amount of times the word appears in the file. Space, tab, and new line all count as space characters. The...

Q1 Write a python regular expression to match a certain pattern of phone number. ###...

Q1 Write a python regular expression to match a certain pattern of phone number. ### Suppose we want to recognize phone numbers with or without hyphens. The ### regular expression you give should work for any number of groups of any (non- ### empty) size, separated by 1 hyphen. Each group is [0-9]+. ### Hint: Accept "5" but not "-6" ### FSM for TELEPHONE NUMBER IS: # state:1 --[0-9]--> state:2 # state:2 --[0-9]--> state:4 # state:2 --[\-]---> state:3 #...

Write a JAVA program that reads a text file into RAM efficiently, takes a regular expression...

Write a JAVA program that reads a text file into RAM efficiently, takes a regular expression from the user, and then prints every line that matches the RE.

Write a regular expression for the language of all strings over {a,b} in which every b...

Write a regular expression for the language of all strings over {a,b} in which every b is directly preceded by a, and may not be directly followed by more than two consecutive a symbols.

Write a regular expressions that would match lines in text that contain word DATE: at the...

Write a regular expressions that would match lines in text that contain word DATE: at the beginning of a line followed by actual date in format YYYY-MM-DD. Space between colon ( : ) and date may or may not exist. In C, if you issue the following statement n << 2 where n is an integer, what will be value of n? In bash, if you define variable var = “date” and issue a statement echo `$var`, what output will...

Question