大约有 30,000 项符合查询结果（耗时：0.0414秒） [XML]
For each row return the column name of the largest value
...what department they are in most often. It is trivial to tabulate employee ID against department name, but it is trickier to return the department name, rather than the number of roster counts, from the frequency table. A simple example below (column names = departments, row names = employee ids).
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How to cat a file containing code?
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A here string in single quotes obviously cannot contain any single quotes, which may be a prohibitive issue. Here documents are the only sane workaround if you have a script which needs to contain both single and double quotes, alt...
Passing arrays as url parameter
...
);
$query = http_build_query(array('aParam' => $data));
will return
string(63) "aParam%5B0%5D=1&aParam%5B1%5D=4&aParam%5Ba%5D=b&aParam%5Bc%5D=d"
http_build_query() handles all the necessary escaping for you (%5B => [ and %5D => ]), so this string is equal to aParam[0]=1&am...
Strip spaces/tabs/newlines - python
...are regarded as a single
separator, and the result will contain no empty strings at the start
or end if the string has leading or trailing whitespace.
Demo:
>>> myString.split()
['I', 'want', 'to', 'Remove', 'all', 'white', 'spaces,', 'new', 'lines', 'and', 'tabs']
Use str.join on ...
What is the purpose of “!” and “?” at the end of method names?
... just looks weird.
In your example, name.reverse evaluates to a reversed string, but only after the name.reverse! line does the name variable actually contain the reversed name. name.is_binary_data? looks like "is name binary data?".
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Append values to a set in Python
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If you add a string with update, it will add one item per character in your string because it's an iterable!
– hgolov
Feb 7 '18 at 9:56
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Running Command Line in Java [duplicate]
...nput = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
try {
while ((line = input.readLine()) != null)
System.out.println(line);
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
p.waitFor();
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.NET: Which Exception to Throw When a Required Configuration Setting is Missing?
....x to 2.0, or if Microsoft decides to change the recommendation again:
if(string.IsNullOrEmpty(Configuration.AppSettings("foobar")))
{
throw CreateMissingSettingException("foobar");
}
...
private static Exception CreateMissingSettingException(string name)
{
return new ConfigurationErrorsEx...
Encoding URL query parameters in Java
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java.net.URLEncoder.encode(String s, String encoding) can help too. It follows the HTML form encoding application/x-www-form-urlencoded.
URLEncoder.encode(query, "UTF-8");
On the other hand, Percent-encoding (also known as URL encoding) encodes sp...
When to use Common Table Expression (CTE)
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Interesting fact about CTE. I always wondered why NEWID() in the CTE changes when the CTE is referenced more than once. select top 100 * into #tmp from master..spt_values order by 1,2,3,4 select A.number, COUNT(*) from #tmp A inner join #tmp B ON A.number = B.number+1 group by...