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What does the “assert” keyword do? [duplicate]
...
(If you launched with -enableassertions that is.)
Formally, the Java Language Specification: 14.10. The assert Statement says the following:
14.10. The assert Statement
An assertion is an assert statement containing a boolean expression. An assertion is either enabled or disabled. If the...
How to fix Hibernate LazyInitializationException: failed to lazily initialize a collection of roles,
...om AuthenticationProvider like you suggest, I get an error Caused by: java.lang.IllegalArgumentException: Can not set com.horariolivre.security.CustomAuthenticationProvider field com.horariolivre.security.SecurityConfig.authenticationProvider to $Proxy36. I get the same error if I use the add fetchT...
How can one change the timestamp of an old commit in Git?
..., so to be completely correct, you'll have to make it something like this: LANG= GIT_COMMITTER_DATE="`date`" git commit --amend --date "`date`"
– Michał Góral
May 27 '15 at 19:53
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Redirect from an HTML page
...t code and would have a link just in case.
<!DOCTYPE HTML>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta http-equiv="refresh" content="0; url=http://example.com">
<script type="text/javascript">
window.location.hr...
How do you access command line arguments in Swift?
...equires Foundation. My answer doesn't require Foundation. Just uses swift lang standard lib.
– orj
Jun 4 '14 at 5:33
7
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How to get the first non-null value in Java?
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Apache Commons Lang 3
ObjectUtils.firstNonNull(T...)
Java 8 Stream
Stream.of(T...).filter(Objects::nonNull).findFirst().orElse(null)
share
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Instantiating a generic class in Java [duplicate]
...Generic g = new Generic();
g.initParameter();
}
}
import java.lang.reflect.ParameterizedType;
public abstract class GenericAbstract<T extends Foo> {
protected T parameter;
@SuppressWarnings("unchecked")
void initParameter() throws Exception, ClassNotFoundException,
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Ruby Gem install Json fails on Mavericks and Xcode 5.1 - unknown argument: '-multiply_definedsuppres
...n [downgrading error to warning] will not be supported in the future.
The clang note we are seeing (this will be a hard error (cannot be downgraded to a warning) in the future) corresponds to the change announced in the release notes.
To answer your question specifically, use the following to insta...
Exception thrown inside catch block - will it be caught again?
...tion: class java.io.IOException
In finally
Exception in thread "main" java.lang.RuntimeException
at Catch.main(Catch.java:8)
Technically that could have been a compiler bug, implementation dependent, unspecified behaviour, or something. However, the JLS is pretty well nailed down and the co...
Weird Integer boxing in Java
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The true line is actually guaranteed by the language specification. From section 5.1.7:
If the value p being boxed is true,
false, a byte, a char in the range
\u0000 to \u007f, or an int or short
number between -128 and 127, then let
r1 and r2 be the result...