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11 Cards in this Set
- Front
- Back
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In general, what do regular expressions provide?
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A standard, formal way to specify patterns we want to match in an unambiguous way
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What is a regular expression?
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A string representing a specific pattern by use of an accepted notation, with each character having a specific meaning.
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How does the forward slash \ relate to regular expressions? It is only needed when the next character has both a literal and an alternate meaning.
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Reg exp's use \'s to signify when the next character has its literal meaning and when it has a special meaning
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Which characters do not match "themselves"?
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.[{()\*+?|^$
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What serves as a wildcard for any single character?
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. (period)
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What character makes the characters that follow match according to the "first part of the things being searched for"
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^
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What character follows characters and matches the "end of a searched item"?
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$
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What operator will match the preceding atom zero or more times?
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*
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What operator matches the preceding "atom" zero to one time?
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?
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What operator will match the preceding atom one ore more times?
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The + operator.
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How does Bounded Repetition work?
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a{n} matches a exactly "n" times a{n,} matches 'a' "n" or more times a{n,m} matches 'a' between "n" and "m" times inclusively |
