大约有 370 项符合查询结果(耗时:0.0208秒) [XML]
How do I trim whitespace?
...h(' \t blah ')
>>> m.group(1)
'blah'
>>> m=p.match(' \tbl ah \t ')
>>> m.group(1)
'bl ah'
>>> m=p.match(' \t ')
>>> print m.group(1)
None
Searching (you have to handle the "only spaces" input case differently):
>>> p1=re.compile('\\S.*\...
Who wrote this programing saying? “Always code as if the guy who ends up maintaining your code will
...on Google Groups is unattributed in the sig of a post by Martin Golding in 1994.
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程序员必知 —— 编程语言创始人 - 创意 - 清泛网 - 专注C/C++及内核技术
...计划”,后来发展一套语言叫做“Oak”,后改名为Java。1994年底,James Gosling在硅谷召开的“技术、教育和设计大会”上展示Java程式。2000年,Java成为世界上最流行的电脑语言。
Objective-C语言创始人
布莱德·考克斯(英语:Brad ...
Easiest way to copy a table from one database to another?
...s here gets a better approach.
As of 5.6.10 you can do
CREATE TABLE new_tbl LIKE orig_tbl;
Refer documentation here: https://dev.mysql.com/doc/refman/5.7/en/create-table-like.html
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How to turn IDENTITY_INSERT on and off using SQL Server 2008?
...ify the column names and for some reason it did not like it.
INSERT INTO tbl Values(vals)
So basically do the full INSERT INTO tbl(cols) Values(vals)
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Insert auto increment primary key to existing table
... adding the PRIMARY KEY column works correctly in my testing:
ALTER TABLE tbl ADD id INT PRIMARY KEY AUTO_INCREMENT;
On a temporary table created for testing purposes, the above statement created the AUTO_INCREMENT id column and inserted auto-increment values for each existing row in the table, s...
Storing SHA1 hash values in MySQL
...hash value.
Created one sample table with require CHAR(n):
CREATE TABLE tbl_PasswordDataType
(
ID INTEGER
,MD5_128_bit CHAR(32)
,SHA_160_bit CHAR(40)
,SHA_224_bit CHAR(56)
,SHA_256_bit CHAR(64)
,SHA_384_bit CHAR(96)
,SHA_512_bit CHAR(128)
);
INSERT INTO tbl_PasswordDa...
MySQL get row position in ORDER BY
...calculate the position.
For example in your case
Query 1:
SELECT * FROM tbl WHERE name = 'Beta'
Query 2:
SELECT COUNT(1) FROM tbl WHERE name >= 'Beta'
We use this approach in a table with 2M record and this is way more scalable than OMG Ponies's approach.
...
What does the git index contain EXACTLY?
...y looks like:
.git/objects/
|-- 78
| `-- 981922613b2afb6025042ff6bd878ac1994e85
|-- info
`-- pack
And if we get the content of the only object:
git cat-file -p 78981922613b2afb6025042ff6bd878ac1994e85
We get a. This indicates that:
the index points to the file contents, since git add b cre...
比尔盖茨“未来生活预言”的科技豪宅(图) - 资讯 - 清泛网 - 专注C/C++及内核技术
...斯特手稿》(Codex Leicester),这部15世纪时的手稿是盖茨于1994年在一次拍卖会上以3080万美元竞拍的。
1998年,比尔·盖茨曾经斥资3千600万美元(约合2.3亿人民币)买下温斯洛·霍默的超现实主义画作《迷失在大浅滩》(Lost on the Gra...