大约有 16,000 项符合查询结果（耗时：0.0357秒） [XML]
What does && mean in void *p = &&abc;
...
I know about rvalue references but I think && used in this context is different. What does && indicate in void *p = &&abc; ?
...
Understanding the Gemfile.lock file
...mfile and Gemfile.lock snapshot. Now, your repository has a record of the exact versions of all of the gems that you used the last time you know for sure that the application worked...
This is important: the Gemfile.lock makes your application a single package of both your own code and the third-par...
Search for “does-not-contain” on a DataFrame in pandas
...here new_df is the copy returned by RHS.
contains also accepts a regular expression...
If the above throws a ValueError, the reason is likely because you have mixed datatypes, so use na=False:
new_df = df[~df["col"].str.contains(word, na=False)]
Or,
new_df = df[df["col"].str.contains(word) =...
Difference between pre-increment and post-increment in a loop?
...there a difference in ++i and i++ in a for loop? Is it simply a syntax thing?
22 Answers
...
How to do a JUnit assert on a message in a logger
...firstLogEntry.getLoggerName(), is("MyTest"));
}
}
class TestAppender extends AppenderSkeleton {
private final List<LoggingEvent> log = new ArrayList<LoggingEvent>();
@Override
public boolean requiresLayout() {
return false;
}
@Override
protected voi...
What are the various “Build action” settings in Visual Studio project properties and what do they do
...eferring to the BuildAction property for each file selected in Solution Explorer. There are a number of options and it's difficult to know what each one of them will do.
...
What is the fastest way to send 100,000 HTTP requests in Python?
...ath)
res = conn.getresponse()
return res.status, ourl
except:
return "error", ourl
def doSomethingWithResult(status, url):
print status, url
q = Queue(concurrent * 2)
for i in range(concurrent):
t = Thread(target=doWork)
t.daemon = True
t.start()
try:
...
Correct use of Multimapping in Dapper
... fine:
var sql = "select cast(1 as decimal) ProductId, 'a' ProductName, 'x' AccountOpened, cast(1 as decimal) CustomerId, 'name' CustomerName";
var item = connection.Query<ProductItem, Customer, ProductItem>(sql,
(p, c) => { p.Customer = c; return p; }, splitOn: "CustomerId").First()...
How do you use https / SSL on localhost?
...
If you have IIS Express (with Visual Studio):
To enable the SSL within IIS Express, you have to just set “SSL
Enabled = true” in the project properties window.
See the steps and pictures at this code project.
IIS Express will gen...
jQuery - get a list of values of an attribute from elements of a class
... to build the array with a little plain javascript: $(".object").get().map(x => x.getAttribute('level'));
– elPastor
Feb 26 '19 at 13:00
...