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 08:30
Aconsumer would pay an extra they used the rent to own program to buy the computer, rather than using cash. for all of the items, is the cheapest option over the life of the contract. the most expensive overall option is to use purchase the item.
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Computers and Technology, 24.06.2019 20:20
Write python code that prompts the user to enter his or her age and assigns the user’s input to an integer variable named age.
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Computers and Technology, 24.06.2019 21:30
Along what line of action can the camera move to follow the movement of actors for screen direction? a. along a 90-degree arcb. along a 120-degree arcc. along a 180-degree arcd. along a 360-degree arc
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Computers and Technology, 25.06.2019 08:30
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
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This homework is about the language of regular expressions. One way to define that language is using...
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