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How to avoid null checking in Java?
... if your method just passes the value on, and the next method passes it on etc. it could get problematic. In that case you may want to check the argument as above.
If null is allowed
This really depends. If find that I often do something like this:
if (object == null) {
// something
} else {
...
What exactly does the Access-Control-Allow-Credentials header do?
...a class of vulnerabilities called cross-site request forgery, or CSRF.
In order to reduce the chance of CSRF vulnerabilities in CORS, CORS requires both the server and the client to acknowledge that it is ok to include cookies on requests. Doing this makes cookies an active decision, rather than so...
Android Fragments and animation
...mFragment );
transaction.addToBackStack(null);
transaction.commit();
The order is important. This means you must call setCustomAnimations() before replace() or the animation will not take effect!
Next these files have to be placed inside the res/anim folder.
enter.xml:
<?xml version="1.0" e...
What is an SSTable?
...
"An SSTable provides a persistent,ordered immutable map from keys to values, where both keys and values are arbitrary byte strings. Operations are provided to look up the value associated with a specified key, and to iterate over all key/value pairs in a spec...
Which iOS app version/build number(s) MUST be incremented upon App Store release?
... ...
Version (CFBundleShortVersionString) must be in ascending sequential order.
Build number (CFBundleVersion) must be in ascending sequential order.
Version Number and Build Number Checklist
Here are some things you can check when submitting a new build to the App Store. Making sure ...
Why is the clone() method protected in java.lang.Object?
...s is a highly atypical use of interfaces and not one to be emulated ... In order for implementing the interface to have any effect on a class, it and all of its superclasses must obey a fairly complex, unenforceable and largely undocumented protocol"
...
How can I plot separate Pandas DataFrames as subplots?
..._subplot() which takes subplot grid parameters such as 221, 222, 223, 224, etc. as described in the post here. Nice examples of plot on pandas data frame, including subplots, can be seen in this ipython notebook.
share
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How do I attach events to dynamic HTML elements with jQuery? [duplicate]
...function() {
// do something
});
This can be an issue because of the order event handlers are fired. If you find yourself doing this, but it is causing issues because of the order in which it is handled.. You can always wrap that into a function, that when called "refreshes" the listener.
For...
How to center a Window in Java?
...other answer, setLocationRelativeTo(null) has to be called after pack() in order to work.
– Eusebius
Apr 19 '14 at 5:18
6
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How to reload a clojure file in REPL
...efined in a Clojure file without having to restart the REPL. Right now, in order to use the updated file I have to:
8 Answe...