Computers and Technology, 25.02.2020 22:28 shetherealbrat
This homework is about the language of regular expressions. One way to define that language is using a context-free grammar (CFG). To make things a little simpler, rather than allowing any characters as operands in regular expressions, we will restrict ourselves to only allowing letters (that way we don't have to worry about how to specifiy characters that are the same as operators or things like newlines). As usual, we will allow ε (epsilon) in our regular expressions. The operators for our language of regular expressions are:| means "or" (alternation)writing two or more things next to each other means "followed by" (catenation)* means "zero or more" (closure or iteration)+ means "one or more" (positive closure)( ) are used for groupingIn a regular expression, * and + have the same, highest precedence, "followed by" has middle precedence, and | has the lowest precedence. | is right associative, and all other operators are left associative. Write an unambiguous CFG for this language of regular expressions so that parse trees correctly reflect the precedences and associativities of the operators. Use lower-case names for nonterminals and use the following terminals:LTR // any letter EPS // epsilonOR // |STR // *PLS // +LPR // left parenRPR // right paren
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Computers and Technology, 24.06.2019 03:00, firenation18
Click the "draw structure" button to activate the drawing utility. draw two diastereomers of (1z,4r)−1,4−dimethylcyclodecene and name them, including (e)/(z) and (r)/(s) notation. part 1 out of 4 draw the diastereomer containing a chiral center with s configuration here. window open
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Computers and Technology, 25.06.2019 08:10, avalonr2003
What is the requirement for self-contained recovery devices
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Computers and Technology, 25.06.2019 08:30, alemvp7258
When converting the erd to a table design, how should you handle the assignedto relationship? (be sure to include a discussion of primary keys, foreign keys, and tables in your answer.)11. true/false projectid will be a foreign key in the employees table to reflect the “manages” relationship.12. after converting the erd to a table design, what fields will be present in the contracts
Answers: 3
This homework is about the language of regular expressions. One way to define that language is using...
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