大约有 6,000 项符合查询结果（耗时：0.0220秒） [XML]
MySQL IF NOT NULL, then display 1, else display 0
... c
LEFT JOIN addresses a ON c.customerid = a.customerid
WHERE customerid = 123
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Find element's index in pandas Series
... [122]: myseries = pd.Series([1,7,0,7,5], index=['a','b','c','d','e'])
In [123]: list(myseries[myseries==7].index)
Out[123]: ['b', 'd']
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Parse config files, environment, and command-line arguments, to get a single collection of options
...iguration file parsing ( configparser ), environment variable reading ( os.environ ), and command-line argument parsing ( argparse ). I want to write a program that does all those, and also:
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Random hash in Python
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I would've used os.urandom because wanting an MD5 hash might mean wanting a secure one.
– Unknown
Jun 11 '09 at 22:58
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How to configure Mac OS X term so that git has color? [closed]
I've seen a Mac OS X git demo online in which it's configured to have multiple colors.
6 Answers
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How to handle :java.util.concurrent.TimeoutException: android.os.BinderProxy.finalize() timed out af
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Full disclosure - I'm the author of the previously mentioned talk in TLV DroidCon.
I had a chance to examine this issue across many Android applications, and discuss it with other developers who encountered it - and we all got to the ...
How to deal with floating point number precision in JavaScript?
...OfDecimals(Y) = ExpectedNumberOfDecimals. That is to say that if we have 0.123 * 0.12 then we know that there will be 5 decimal places because 0.123 has 3 decimal places and 0.12 has two. Thus if JavaScript gave us a number like 0.014760000002 we can safely round to the 5th decimal place without fea...
How to capitalize the first letter in a String in Ruby
..."hello".capitalize #=> "Hello"
"HELLO".capitalize #=> "Hello"
"123ABC".capitalize #=> "123abc"
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html - table row like a link
...hn Smith</a></td>
<td><a href="person1.html">123 Fake St</a></td>
<td><a href="person1.html">90210</a></td>
</tr>
<tr>
<td><a href="person2.html">Peter Nguyen</a></td>
<...
Update or Insert (multiple rows and columns) from subquery in PostgreSQL
... col2 = othertable.col3
FROM othertable
WHERE othertable.col1 = 123;
For the INSERT
Use:
INSERT INTO table1 (col1, col2)
SELECT col1, col2
FROM othertable
You don't need the VALUES syntax if you are using a SELECT to populate the INSERT values.
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