The backslash in a regular expression precedes a literal character. You also escape certain letters that represent common character classes, such as \w for a word character or \s for a space. The following example matches word characters (alphanumeric and underscores) and spaces.
Regex(
"Are you there, Alice?, asked Jerry.", // source
"(here|there).+(\w+).+(said|asked)(\s)(\w+)\." ); // regular expression
"there, Alice?, asked Jerry."
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(here|there).+ |
Matches “there”, a comma, and a space. |
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(\w+) |
Matches “Alice”. |
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.+ |
Matches “?, “. |
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(said|asked)(\s) |
Matches “asked” followed by a space. Without the space, the match would end here; “asked” is followed by a space in the source string. |
|
(\w+)\. |
Matches “Jerry” and a period. |
Table 6.10 describes the escaped characters supported in JMP. \C, \G, \X, and \z are not supported.
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\\ |
single backslash |
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\A |
start of a string |
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\b |
word boundary. The zero-length string between \w and \W or \W and \w. |
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\B |
not at a word boundary |
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\cX |
ASCII control character |
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\d |
single digit [0-9] |
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\D |
single character that is NOT a digit [^0-9] |
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\E |
stop processing escaped characters |
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\l |
match a single lowercase letter [a-z] |
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\L |
single character that is not lowercase [^a-z] |
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\Q |
ignore escaped characters until \E is found |
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\r |
carriage return |
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\s |
single whitespace character |
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\S |
single character that is NOT white space |
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\u |
single uppercase character [A-Z] |
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\U |
single character that is not uppercase [^A-Z] |
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\w |
word character [a-zA-Z0-9_] |
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\W |
single character that is NOT a word character [^a-zA-Z0-9_] |
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\x00-\xFF |
hexadecimal character |
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\x{0000}-\x{FFFF} |
Unicode code point |
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\Z |
end of a string before the line break |