Monthly Archives: June 2023

Hackitivism, or Political hacking

Regular expression: From Wikipedia, the free encyclopedia

In computing, regular expressions (abbreviated as regex or regexp, with plural forms regexes, regexps, or regexen) provide a concise and flexible means for identifying text of interest, such as particular characters, words, or patterns of characters. Regular expressions are written in a formal language that can be interpreted by a regular expression processor, a program that either serves as a parser generator or examines text and identifies parts that match the provided specification.

Regular expressions are used by many text editors, utilities, and programming languages to search and manipulate text based on patterns. For example, Perl and Tcl have a powerful regular expression engine built directly into their syntax. Several utilities provided by Unix distributions—including the editor ed and the filter grep—were the first to popularize the concept of regular expressions.

7.1 Exercise – Fill in the following chart:

Google Search

Number of Hits

Regex

1,39,00,000

Regex Linux

1,15,00,000

Regex   Windows

1,24,00,000

Regex Perl

57,10,000

Regex Java

2,31,00,000

Regex Vi

13,80,000

Regex egrep

1,28,000

Regex POSIX

4,62,000

In these notes we concentrate on POSIX regular expressions using egrep.

Wildcards:

Assume we have a directory with the following contents:

Using “wild cards:

7.2 The Grep Family

The UNIX grep utility marked the birth of a global regular expression print(GREP) tools. Searching for patterns in text is important operation in a number ofdomains, including program comprehension and software maintenance, structuredtext databases, indexing file systems, and searching natural language texts. Such awide range of uses inspired the development of variations of the original UNIXgrep. This variations range from adding new features, to employing fasteralgorithms, to changing the behaviour of pattern matching and printing. This

survey presents all the major developments in global regular expression printtools, namely the UNIX grep family, the GNU grep family, agrep, cgrep, sgrep,nrgrep, and Perl regularexpressions. Taken from man grep:

7.3 Regexs: Some Examples

Some Examples:We start with several simple examples. Assume we have a file fruits:

Matching characters “strings” by example: 

Metacharacters: Metacharacters are characters that have ‘special’ meaning. Here are the metacharacters that are defined.

. Matches anycharacter.

* “character*” specifies that the character can be matched zero or more times.

+ “character+” Matches that character one or more times. Pay careful attention to the 

difference between * and +; * matches zero or more times, so whatever’s being repeatedmay not be present at all, while + requires at least one occurrence. To use a similar example, ca+t will match “cat” (1 “a”), “caaat” (3 “a”‘s), but won’t match “ct”. 

? “character?” Matches that character either once or zero times; you can think of it as marking something as being optional. For example, home-?brew matches either “homebrew” or “home-brew”.

Examples:

If you wish to search for a metacharacter the metacharacter must be escaped by preceding it with the backslash “”.As an example let’s assume we have a file such as:

And we wish to fine “209.204.146.22”. egrep ‘209.204.146.22’ ip will NOT work. We must escape the “.” character. 

Anchors:

Using ^ and $ you can force a regex to match only at the start or end of a line, respectively. 

^ Match at the start of a line

$ Match at the end of a line

As you can see, this regex fails to match both apple and grape, since neither starts with a ‘p’. The fact that they contain a ‘p’ elsewhere is irrelevant. Similarly, the regex e$ only matches apple, orange and grape:So ^cat matches only those lines that start with cat, and cat$ only matches lines ending with cat.

Mind the quotes though! In most shells, the dollar-sign has a special meaning. By putting the regex in single-quotes (not double-quotes or back-quotes), the regex will be protected from the shell, so to speak. It’s generally a good idea to single-quote your regexes.

Moving on, ^cat$ only matches lines that contain exactly cat. You can find empty lines in a similar way with ^$. If you’re having trouble understanding that last one, just apply the definitions. The regex basically says: “Match a start-of-line, followed by an end-of-line”. 

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Instructions

Week 6 Assignment:

In order to complete assignment #6 you will need to answer the below questions. Please complete the questions in a Word document and then upload the assignment for grading. When assigning a name to your document please use the following format (last name_Assignment #6). Use examples from the readings, lecture notes and outside research to support your answers. The assignment must be a minimum of one (1) full page in length with a minimum of two (2) outside sources. Please be sure to follow APA guidelines for citing and referencing source. Assignments are due by 11:59 pm Eastern time on Sunday.

                        (Question Below)

Discuss the impact of SQL injections.

Review the below table. Suzie has an issue. She can either move to NY or FL and needs to review some data that her agent gave her. The agent reviewed house prices and crime ratings for houses that Suzie would be interested in based on her selection criteria. She wants to live in an area with lower crime but wants to know a few things:

1. Is it more expensive or less expensive to live in FL or NY?
2. Is the crime rate higher in FL or NY (Note a low score in crime means lower crime)?
3. Is the crime rate higher in lower or higher house price areas?

Using the R tool, show the data in the tool to answer each of the questions. Also, show the data visualization to go along with the summary.

1. If you were Suzie, where would you move based on the questions above?
2. After you gave Suzie the answer above (to #4), she gave you some additional information that you need to consider:
   1. She has $100,000 to put down for the house.
   2. If she moves to NY she will have a job earning $120,000 per year.
   3. If she moves to FL she will have a job earning $75,000 per year.
   4. She wants to know the following:
      1. On average what location will she be able to pay off her house first based on average housing prices and income she will receive?
      2. Where should she move and why? Please show graphics and thoroughly explain your answer here based on the new information provided above.
   5. tableLocationPriceCrime RatingNY225,2508NY3155425NY4502652NY7502501NY5546682NY3221244NY4112582NY3554124NY4662512NY7012511NY2413154NY3452155NY1985629NY1887528NY7412452NY6423153NY4235612NY5214461NY2456858NY2455434FL1203215FL1520154FL2145216FL2352134FL2635312FL2589644FL3256452FL3256411FL3245122FL2451205FL2457844FL2651245FL3521562FL3595213FL3985411FL4012131FL4023151FL2560125FL3140212FL1596328FL2013216FL2042015FL2052364FL2072056FL2062014FL1982655Note: The screenshots should be copied and pasted and must be legible. Only upload the word document. Be sure to answer all of the questions above and number the answers. Be sure to also explain the rational for each answer and also ensure that there are visuals for each question above. Use at least two peer reviewed sources to support your work.

refer to the attached document

The programmer will write the  ExpressionSolverRunner that will use the ExpressionSolver class to solve  an integer expression provided by the ExpressionSolver textfile. An  expression will a String and it will be comprised of number and the  mathematical operators +, *, /, and -. The % operation will not be a  part of this program. In order to read an expression, the user must read  the expression from left to right performing the multiplication and  division operators before attempting the subtraction arguments. The  programmer should be careful to follow the order of operations, or they  will not get the correct answer. The calculation is integer mathematics,  so there will be no rounding but just truncation. The programmer should  take particular care when a multiplication and a division or next to  each other and make sure to do the operations from left to right. There  will be no parenthesis in the expression. 

Discussion Question:

What types of works are exempt from copyright protection? Give specific examples of websites that have content that are not protected by copyright law.

Python Homework 3, 4, & 5

Complete your Project Paper. Ensure that it conforms to APA requirements. RUN SPELL CHECK AND GRAMMAR CHECK BEFORE SUBMITTING!

Based on your draft paper, prepare the final version of your paper.  Remember, your paper must address the following points:

1. Describe the factors influencing the need for change and the imperatives for managing information assurance change initiatives.
2. Discuss how group and organizational dynamics may affect the success of your information assurance change initiative.
3. Evaluate the leadership style needed to successfully implement your information assurance change initiative.
4. Describe your change strategy and the potential resistance factors to be managed.
5. Describe the change model most appropriate for your information assurance change initiative.