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Matching a Date in mm/dd/yyyy Format
(
0
[1-9]
|
1
[012]
)
[- /.]
(
0
[1-9]
|
[12]
[0-9]
|
3
[01]
)
[- /.]
(
19
|
20
)
\d
\d
Match the regular expression below and capture its match into backreference number 1
Match either the regular expression below (attempting the next alternative only if this one fails)
Match the character "0" literally
Match a single character out of the list: in the range between 1 and 9
Or match regular expression number 2 below (the entire group fails if this one fails to match)
Match the character "1" literally
Match a single character out of the list: one of the characters "012"
Match a single character out of the list: one of the characters "- /."
Match the regular expression below and capture its match into backreference number 2
Match either the regular expression below (attempting the next alternative only if this one fails)
Match the character "0" literally
Match a single character out of the list: in the range between 1 and 9
Or match regular expression number 2 below (attempting the next alternative only if this one fails)
Match a single character out of the list: one of the characters "12"
Match a single character out of the list: in the range between 0 and 9
Or match regular expression number 3 below (the entire group fails if this one fails to match)
Match the character "3" literally
Match a single character out of the list: one of the characters "01"
Match a single character out of the list: one of the characters "- /."
Match the regular expression below and capture its match into backreference number 3
Match either the regular expression below (attempting the next alternative only if this one fails)
Match the characters "19" literally
Or match regular expression number 2 below (the entire group fails if this one fails to match)
Match the characters "20" literally
Match a single digit 0..9
Match a single digit 0..9
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