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Why does C++ require a user-provided default constructor to default-construct a const object?
...zation of T would invoke a user-provided constructor
of T (not inherited from a base class) or if
each direct non-variant non-static data member M of T has a default member initializer or, if M is of class type X (or array thereof), X
is const-default-constructible,
if T is a union wit...
Best way to stress test a website [duplicate]
...e best thing to use a profiler to track a single request and then work out from that if the performance is ok?
9 Answers
...
erb, haml or slim: which one do you suggest? And why? [closed]
...s char count by much and a lot more readable than ERB.
For example (taken from official HAML site):
In ERB your view will look like this:
<div id="profile">
<div class="left column">
<div id="date"><%= print_date %></div>
<div id="address"><%= curr...
Create a dictionary with list comprehension
...) of keys and/or values, just call the dict built-in directly:
1) consumed from any iterable yielding pairs of keys/vals
dict(pairs)
2) "zip'ped" from two separate iterables of keys/vals
dict(zip(list_of_keys, list_of_values))
...
Convert date to another timezone in JavaScript
...it were in the local time zone. Don't do that. Just use the string output from the first toLocalString call.
– Matt Johnson-Pint
Apr 24 '19 at 22:45
4
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What happens if you don't commit a transaction to a database (say, SQL Server)?
...ot yet commit. then in the other window you can see how the database looks from outside the transaction. Depending on the isolation level, the table may be locked until the first window is committed, or you might (not) see what the other transaction has done so far, etc.
Play around with the differ...
Is null check needed before calling instanceof?
...nstanceof.
The expression x instanceof SomeClass is false if x is null.
From the Java Language Specification, section 15.20.2, "Type comparison operator instanceof":
"At run time, the result of the
instanceof operator is true if the
value of the RelationalExpression is
not null and the...
How to merge remote changes at GitHub?
...ou don’t care about the changes done locally and want to obtain the code from the repository, you can force a pull. This will overwrite all the local changes done on your computer a duplicate copy of the version in the repository will appear.
Execute the following commands in your IDE:
git rese...
Spring boot @ResponseBody doesn't serialize entity id
...Type::getJavaType)
.filter(Identifiable.class::isAssignableFrom)
.toArray(Class[]::new));
}
If you only want to expose the identifiers of entities with a specific annotation:
...
@Override
public void configureRepositoryRestConfiguration(Repos...
Enabling ProGuard in Eclipse for Android
...to point to the
# "proguard-android-optimize.txt" file instead of this one from your
# project.properties file.
#To repackage classes on a single package
#-repackageclasses ''
#Uncomment if using annotations to keep them.
#-keepattributes *Annotation*
#Keep classes that are referenced on the Andr...