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Synchronization vs Lock
java.util.concurrent API provides a class called as Lock , which would basically serialize the control in order to access the critical resource. It gives method such as park() and unpark() .
...
Can local storage ever be considered secure? [closed]
...ailed below. All but one of these concerns does not apply to the WebCrypto API, which is now reasonably well supported.
For an offline app, you must still design and implement a secure keystore.
Aside: If you are using Node.js, use the builtin crypto API.
Native-Javascript Cryptography (pre-WebCr...
When and how should I use a ThreadLocal variable?
...en using them to avoid unwanted side-effects and memory leaks. Design your APIs so that the ThreadLocal values will always be automatically cleared when they are not needed anymore and that incorrect use of the API won't be possible (for example like this). ThreadLocals can be used to make the code ...
代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...息：
3月 04, 2025 9:50:11 上午 com.google.appengine.tools.development.ApiProxyLocalImpl log
严重: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract long com.google.appinventor.sha...
How can I combine two HashMap objects containing the same types?
...
One-liner using Java 8 Stream API:
map3 = Stream.of(map1, map2).flatMap(m -> m.entrySet().stream())
.collect(Collectors.toMap(Entry::getKey, Entry::getValue))
Among the benefits of this method is ability to pass a merge function, which will d...
SQLite with encryption/password protection
...SL's libcrypto to implement.
SQLiteCrypt - Custom implementation, modified API.
botansqlite3 - botansqlite3 is an encryption codec for SQLite3 that can use any algorithms in Botan for encryption.
sqleet - another encryption implementation, using ChaCha20/Poly1305 primitives. Note that wxSQLite ment...
log4j logging hierarchy order
...000;
public final static int ALL_INT = Integer.MIN_VALUE;
or the log4j API for the Level class, which makes it quite clear.
When the library decides whether to print a certain statement or not, it computes the effective level of the responsible Logger object (based on configuration) and compare...
How to sort a HashMap in Java [duplicate]
... them.
In any case, you can't have sorted values in HashMap (according to API This class makes no guarantees as to the order of the map; in particular, it does not guarantee that the order will remain constant over time ].
Though you can push all these values to LinkedHashMap, for later use as we...
optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
... To get over the nil issue, I'm copying the code from the OP's link (api.rubyonrails.org/classes/ActionView/Base.html) <% if local_assigns.has_key? :headline %> Headline: <%= headline %> <% end %> -- has_key avoids the nil / false situation, and probably can be shortened to...
How to Display blob (.pdf) in an AngularJS app
...urn {
downloadPdf: function () {
return $http.get('api/downloadPDF', { responseType: 'arraybuffer' }).then(function (response) {
return response;
});
}
};
});
Java REST Web Services - Spring MVC:
@RequestMapping(value = "/downloadPDF...