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正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...来查找所有以0开头，后面跟着2-3个数字，然后是一个连字号“-”，最后是7或8位数字的字符串(像010-12345678或0376-7654321)。
入门
学习正则表达式的最好方法是从例子开始，理解例子之后再自己对例子进行修改，实验。下面给出...
How to delete history of last 10 commands in shell?
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Fizer Khan
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answered Feb 7 '13 at 12:07
WheretheresaWill...
Defining an array of anonymous objects in CoffeeScript
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island205island205
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6
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Validating IPv4 addresses with regexp
...idation, but without much luck. It seemed at one point I had had it with (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
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How to get row from R data.frame
...is, for example:
#Add your data
x <- structure(list(A = c(5, 3.5, 3.25, 4.25, 1.5 ),
B = c(4.25, 4, 4, 4.5, 4.5 ),
C = c(4.5, 2.5, 4, 2.25, 3 )
),
.Names = c("A", "B", "C"),
class = "da...
Catch an exception thrown by an async void method
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edited Mar 25 '19 at 15:18
adamj537
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answered Mar 21...
Regular expression that matches valid IPv6 addresses
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254
I was unable to get @Factor Mystic's answer to work with POSIX regular expressions, so I wrote...
PostgreSQL database default location on Linux
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answered Nov 25 '17 at 23:02
Roby SottiniRoby Sottini
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How do I calculate the date six months from the current date using the datetime Python module?
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edited Mar 25 '16 at 19:17
Paul
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a...
Rank function in MySQL
...rchar(20), age int, gender char(1));
INSERT INTO person VALUES (1, 'Bob', 25, 'M');
INSERT INTO person VALUES (2, 'Jane', 20, 'F');
INSERT INTO person VALUES (3, 'Jack', 30, 'M');
INSERT INTO person VALUES (4, 'Bill', 32, 'M');
INSERT INTO person VALUES (5, 'Nick', 22, 'M');
INSERT INTO person VALU...