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Error: could not find function … in R
...alled? (Look for 'gfortran'.) This affects several major packages in R.
Is Java installed? Are the Java class paths correct?
Check that the package was installed by the admin and available for use by the appropriate user. Sometimes users will install packages in the wrong places or run without app...
How to remove all callbacks from a Handler?
...k (and token)
remove by message.what (and token)
remove by token
Handler.java (leave some overload method）
/**
* Remove any pending posts of Runnable <var>r</var> with Object
* <var>token</var> that are in the message queue. If <var>token</var> is null,
*...
What are the differences between the different saving methods in Hibernate?
...as already associated with the session.” Here’s some example code from Java Persistence with Hibernate.
Session session = sessionFactory1.openSession();
Transaction tx = session.beginTransaction();
Item item = (Item) session.get(Item.class, new Long(1234));
...
Integrate ZXing in Android Studio
....gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.8.0_60\bin\java.exe'' finished with non-zero exit value 2
– Konstantin Konopko
Dec 10 '15 at 12:42
...
What is the difference between \r and \n?
...he Wikipedia newline article.
EDIT: This is language-sensitive. In C# and Java, for example, \n always means Unicode U+000A, which is defined as line feed. In C and C++ the water is somewhat muddier, as the meaning is platform-specific. See comments for details.
...
@RequestBody and @ResponseBody annotations in Spring
...otation. I suggest you consult those sections. Also relevant: @RequestBody javadocs, @ResponseBody javadocs
Usage examples would be something like this:
Using a JavaScript-library like JQuery, you would post a JSON-Object like this:
{ "firstName" : "Elmer", "lastName" : "Fudd" }
Your controller...
Why can't enum's constructor access static fields?
...ly better to use EnumSet.allOf() if you want to write code which exists in Java's documentation instead of just in the specs, but many people seem to be familiar with Enum.values() anyway.
– 4castle
Jun 21 '16 at 1:27
...
How to remove all debug logging calls before building the release version of an Android app?
...oguard, here is a very low-tech solution:
Comment logs:
find . -name "*\.java" | xargs grep -l 'Log\.' | xargs sed -i 's/Log\./;\/\/ Log\./g'
Uncomment logs:
find . -name "*\.java" | xargs grep -l 'Log\.' | xargs sed -i 's/;\/\/ Log\./Log\./g'
A constraint is that your logging instructions mu...
What do the plus and minus signs mean in Objective-C next to a method?
...
@bbum is on the money. The fact that Java re-appropriated the "static" keyword to mean something different is not the fault of the much-older C. While its usage may not be entirely intuitive in C, it seems even less so in Java. I would expect static to be the op...
How do I add a library project to Android Studio?
...n {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
res.srcDirs = ['res']
}
}
}
Additionally you can create a global configuration for your project which will contain SDK versions and build tools version for every...