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Java NIO FileChannel versus FileOutputstream performance / usefulness
...to bugs that affect write integrity.[1][2]
[1] https://bugs.openjdk.java.net/browse/JDK-4469683
[2] http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6608965
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PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
... there are many code examples in books (even in good ones) and through the net, which do exactly that. I don't know, why... Perhaps sometimes simply copied over and over without much thinking...
Guess what happens if you call remove(transaction) still having "cascade ALL" in that @ManyToOne? The a...
Difference between Java SE/EE/ME?
...that any Java programmer should learn (java.lang, java.io, java.math, java.net, java.util, etc...).
Java EE = Enterprise Edition. From Wikipedia:
The Java platform (Enterprise Edition) differs from the Java Standard
Edition Platform (Java SE) in that it adds libraries which provide
func...
Where are $_SESSION variables stored?
...e link to the PHP documentation on this configuration setting:
http://php.net/manual/en/session.configuration.php#ini.session.save-path
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Building and running app via Gradle and Android Studio is slower than via Eclipse
...For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# The Gradle daemon aims to improve the startup and execution time of Gradle.
# When set to true the Gradle daemon is to run the build.
# TODO: disable daemon on C...
JavaScript Form Submit - Confirm or Cancel Submission Dialog Box
...lse;}">
<input type="submit" />
</form>
http://jsfiddle.net/jasongennaro/DBHEz/
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Simple (non-secure) hash function for JavaScript? [duplicate]
...realizations of hash functions written in JS. For example:
SHA-1: http://www.webtoolkit.info/javascript-sha1.html
SHA-256: http://www.webtoolkit.info/javascript-sha256.html
MD5: http://www.webtoolkit.info/javascript-md5.html
If you don't need security, you can also use base64 which is not hash-f...
ERROR: permission denied for sequence cities_id_seq using Postgres
...SQL 8.2 you have to use:
GRANT USAGE, SELECT ON SEQUENCE cities_id_seq TO www;
GRANT USAGE - For sequences, this privilege allows the use of the currval and nextval functions.
Also as pointed out by @epic_fil in the comments you can grant permissions to all the sequences in the schema with:
GR...
Why does C++ need a separate header file?
...as to add a proper module system, allowing code to be compiled similar to .NET or Java, into larger modules, all in one go and without headers. This proposal didn't make the cut in C++0x, but I believe it's still in the "we'd love to do this later" category. Perhaps in a TR2 or similar.
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Use latest version of Internet Explorer in the webbrowser control
...n , but how is it possible to use the latest version of the installed Internet Explorer in a webbrowser control?
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