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How do I use format() on a moment.js duration?
...can use the moment.js format method on duration objects? I can't find it anywhere in the docs and it doesn't seen to be an attribute on duration objects.
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How to send a stacktrace to log4j?
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try {
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} catch (Exception e) {
log.error( "failed!", e );
}
It's up to log4j to render the stack trace.
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Can I set an opacity only to the background image of a div?
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Nope, this cannot be done since opacity affects the whole element including its content and there's no way to alter this behavior. You can work around this with the two following methods.
Secondary div
Add another div element to the container to hold the back...
Why does changing the sum order returns a different result?
...t why does simply changing the order of the elements affects the result?
It will change the points at which the values are rounded, based on their magnitude. As an example of the kind of thing that we're seeing, let's pretend that instead of binary floating point, we were using a decimal floating ...
What is the reason why “synchronized” is not allowed in Java 8 interface methods?
In Java 8, I can easily write:
2 Answers
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How can I prevent the “You have mixed tabs and spaces. Fix this?” message?
...le, I get the dreaded "You have mixed tabs and spaces. Fix this?" message. It has three options:
4 Answers
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How to stop unwanted UIButton animation on title change?
In iOS 7 my UIButton titles are animating in and out at the wrong time - late. This problem does not appear on iOS 6. I'm just using:
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Why do I get an UnsupportedOperationException when trying to remove an element from a List?
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Quite a few problems with your code:
On Arrays.asList returning a fixed-size list
From the API:
Arrays.asList: Returns a fixed-size list backed by the specified array.
You can't add to it; you can't remove from it. You ...
Amazon SimpleDB vs Amazon DynamoDB
...t Amazon SimpleDB is, but according to the Amazon DynamoDB description it seems to be almost the same: a NoSQL Key-value store service.
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Interface or an Abstract Class: which one to use?
...u want to force your user-programmers along a particular path. Other times it would be bad. Imagine if PHP's Countable and Iterator interfaces were abstract classes instead of interfaces.
One approach that's common when you're uncertain which way to go (as mentioned by cletus below) is to create ...