{# #} {% from "_macros.html" import input with context %}
Click on a radical to add it to the kanji query input field.
foo
matches "foo".
. ^ $ * + ? { } [ ] \ | ( )
allow matching using sophisticated patterns and rules; they
are escaped by preceding them with a backslash; e.g.
\\
matches an actual backslash.
.
matches any character (except newline); e.g.
ba.
matches "bar", "baz", etc.
^
matches at the start of a line; e.g.
^foo
matches "foo" at the start of a line.
$
matches at the end of a line; e.g.
foo$
matches "foo" at the end of a line.
\b
matches at a "word boundary" (the start or
end of a "word"); e.g. \bbar\b
matches "bar" in
"foo bar baz", but not in "foobarbaz"; \B
is
its complement.
*
matches the preceding thing zero or more
times; e.g. fo*
matches "f", "fo", "foo", etc.
+
matches the preceding thing one or more
times; e.g. fo+
matches "fo", "foo", etc.
?
matches the preceding thing optionally; e.g.
fo?
matches "f" or "fo".
{m,n}
(or just {m}
instead of
{m,m}
) matches the preceding thing
m
to n
times; e.g.
fo{2,4}
matches "foo", "fooo", or "foooo".
[...]
is a character class; e.g.
[a-z]
matches "a" through "z";
[あいうえお]
matches "あ", "い", "う", "え", or
"お".
[^...]
is a complementing character class; e.g.
[^a-z]
matches anything but "a" through "z".
\d
matches any decimal digit (equivalent to
[0-9]
); \D
is its complement
(equivalent to [^0-9]
).
\s
matches any whitespace character;
\S
is its complement.
\w
matches any alphanumeric (i.e. "word" or
"letter") character; \W
is its complement.
|
is alternation; e.g. foo|bar|baz
matches "foo", "bar", or "baz".
(...)
is grouping; e.g. ab*
matches "a", "ab", "abb", etc. whereas (ab)*
matches "", "ab", "abab", etc.; ^foo|bar$
matches "foo" at the beginning of a line or "bar" at the
end, whereas ^(foo|bar)$
matches either "foo"
or "bar" as a whole line; a backslash followed by the number
of the group (starting from 1) can be used later in the
pattern to refer back to what it (actually) matched; e.g.
[a-z]{2}
matches "aa", "ab", "za", etc. whereas
([a-z])\1
matches "aa", "bb", etc. (but not
"ab" or "za").
\p{...}
matches a unicode property; e.g.
\p{Han}
matches kanji,
\p{Hiragana}
matches hiragana, and
\p{Katakana}
matches katakana; \P
is its complement.
\bcat\b
matches "cat" in "the cat" (but not in
e.g. "indicates").
^cat\b
matches "cat" in "cat" or "cat (esp. the
domestic cat, Felis catus)" (but not in e.g. "category").
^cat$
matches "cat" exactly.
^猫\p{Han}$
matches "猫" followed by exactly
one other kanji.
^(\p{Han})\1$
matches e.g. "人人".