正则表达式

正则表达式
创建RegExp 对象	直接量语法	/pattern/attributes		var re2 = /ab/ig;
	创建 RegExp 对象的语法	new RegExp(pattern, attributes);		var re1 = new RegExp("ab", "ig")
	pattern	参数 pattern 是一个字符串，指定了正则表达式的模式或其他正则表达式
	attributes	参数 attributes 是一个可选的字符串，包含属性 "g"、"i" 和 "m"
	i	执行对大小写不敏感的匹配。
	g	执行全局匹配（查找所有匹配而非在找到第一个匹配后停止）
	m	执行多行匹配。
/n+/	匹配任何包含至少一个 n 的字符串，等价于n{1,}.例如：pattern: /b+a/g - input: 'hubba and bubba'
/n*/	匹配任何包含零个或多个 n 的字符串，等价于n{0,}. 例如： pattern: /b*a/g - input: 'hubba and bubba'.
/n?/	匹配任何包含零个或一个 n 的字符串，等价于n{0,1}. 例如：pattern: /b?a/g - input: 'hubba and bubba'
/n{X}/	匹配包含 X 个 n 的序列的字符串.例如：pattern: /9{2}/g - input: '79799799979999'
/n{X,Y}/	匹配包含 X 或 Y 个 n 的序列的字符串.例如：pattern: /9{2,3}/g - input: '79799799979999'.
/n{X,}/	匹配包含至少 X 个 n 的序列的字符串.例如：pattern: /9{2,}/g - input: '79799799979999'
/n$/	匹配任何结尾为 n 的字符串，例如：/$m/不匹配'format'，而匹配'form'
/^n/	匹配任何开头为 n 的字符串，例如：/^m/不匹配'woman'，而匹配'man'
/pattern1(?=pattern2)/	匹配任何其后紧接pattern2的字符串pattern1，例如：Pattern: /a(?=b)/g - input: 'abracadabra'
/pattern1(?!pattern2)/	匹配任何其后不接pattern2的字符串pattern1，例如：Pattern: /a(!=b)/g - input: 'abracadabra'
/pattern1|pattern2/	匹配pattern1或pattern2，例如：pattern: /(a|r)/g - input: 'agreed'
/[axc]/	查找方括号之间的任何字符
/[^adc]/	查找任何不在方括号之间的字符
/[0-9]/	查找任何从 0 至 9 的数字
/[a-z]/	查找任何从小写 a 到小写 z 的字符
/[A-Z]/	查找任何从大写 A 到大写 Z 的字符
/[a-Z]/	查找任何从小写 a 到大写 Z 的字符
/[red|blue|green]/	查找任何指定的选项
/./	查找单个字符，除了换行和行结束符，语法：/regexp./； 例如： pattern:/h.t/g - input:"That's hot!"
/\w/	查找单词字符。
/\W/	查找非单词字符
/\d/	查找数字--只匹配1位数
/\D/	查找非数字字符
/\s/	查找空白字符
/\S/	查找非空白字符
/\b/	查找位于单词的开头或结尾的匹配，语法：/\b regexp/,例如： pattern: /\ba/g - input: 'an abracadabra'.
/\B/	查找不处在单词的开头或结尾的匹配，例如： pattern: /\Ba/g - input: 'an abracadabra'.
/\n/	查找换行符, 等价于\x0a
/\f/	查找换页符, 等价于\x0c
/\r/	查找回车符, 等价于\x0d.
/\t/	查找制表符, 等价于\x09
/\v/	查找垂直制表符, 等价于\x0b
/\xxx/	查找以八进制数 xxx 规定的字符
/\xdd/	查找以十六进制数 dd 规定的字符。
/\uxxxx/	查找以十六进制数 xxxx 规定的 Unicode 字符。
/\0/	查找 NUL 字符
/abc/	Matches the first occurrence of the 'abc' string
/12/	Matches the first occurrence of the '12' string.
/ab*c/	Matches the first occurrence of the string that begins with 'a', followed by any number of 'b' and ends with 'c'. Possible strings: 'ac', 'abc', 'abbc', 'abbbc', ...
/ab+c/	Matches the first occurrence of the string that begins with 'a', followed by at least one 'b' and ends with 'c'. Possible strings: 'abc', 'abbc', 'abbbc', ...
/ab{2,}c/	Matches the first occurrence of the string that begins with 'a', followed by two or more 'b' and ends with 'c'. Possible strings: 'abbc', 'abbbc', 'abbbbc', ...
/(ab)*c/	Matches the first occurrence of the string that begins with some 'ab', followed by 'c'. Possible strings: 'c', 'abc', 'ababc', 'abababc', ...
/(ab)+c/	Matches the first occurrence of the string that begins with one or more 'ab', followed by 'c'. Possible strings: 'abc', 'ababc', 'abababc', ...
/(ab){2,}c/	Matches the first occurrence of the string that begins with two or more 'ab', followed by 'c'. Possible strings: 'ababc', 'abababc', 'ababababc', ...
/ab?c/	Matches the first occurrence of the string that begins with 'a', followed by at most one 'b' and ends with 'c'. Possible strings: 'ac' 'abc'.
/ab{1,2}c/	Matches the first occurrence of the string that begins with 'a', followed by one or two 'b' and ends with 'c'. Possible strings: 'abc' 'abbc'.
/ab{2}c/	Matches the first occurrence of the 'abbc' string.
/(ab)?c/	Matches the first occurrence of the string that begins at most one 'ab', followed by 'c'. Possible strings: 'c' 'abc'.
/(ab){1,2}c/	Matches the first occurrence of the string that begins with one or two 'ab', followed by 'c'. Possible strings: 'abc' 'ababc'
/(ab){2}c/	Matches the first occurrence of the 'ababc' string.
/^whole$/	Checks if the analyzed string is 'whole'.
/^ca(t|r)$/	Checks if the analyzed string is 'cat' or 'car'
/[abc]/	Matches the first occurrence of the 'a', 'b' or 'c' character.
/[ab]{1,2}/	Matches the first occurrence of the 'a', 'b', 'aa', 'ab', 'ba' or 'bb' string.
/[^abc]/	Matches the first occurrence of a character that is not 'a', 'b' and 'c'.
/\d/	Matches the first occurrence of any digit.
/\d{1,2}/	Matches the first occurrence of one or two digits.
/\d|[1-9]\d/	Matches the first occurrence of an integer between 0 and 99. Similar to the previous regular expression, but '00', '01', '02', ..., '09' are not allowed.
/(\+|-)?(\d|[1-9]\d)/	Matches the first occurrence of an integer between 0 and 99 with or without sign.
/\sabc/	Matches the first occurrence of the string that begins with a whitespace, followed by 'abc'
/\sabc\s/	Matches the first occurrence of the string that begins with a whitespace, followed by 'abc' and end s with a whitespace.
/\s\S+\s/	Matches the first occurrence of the string that begins with a whitespace, followed by at least one non-whitespace character and ends with a whitespace.
RegExp方法	方法	语法	描述	返回值
	compile	RegExpObject.compile(regexp,modifier)	编译正则表达式
	exec	RegExpObject.exec(string)	检索字符串中指定的值。	返回一个数组，其中存放匹配的结果。如果未找到匹配，则返回值为 null。
	test	RegExpObject.test(string)	检索字符串中指定的值。	找到就返回true，否则false

 

 

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