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Why do we need private subnet in VPC?
...re previously, the common solution was an EC2 instance on a public subnet within the VPC, functioning as a "NAT instance," providing network address translation (technically, port address translation) for instances in other, private subnets, allowing those machines to use the NAT instance's public I...
Update ViewPager dynamically?
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When using FragmentPagerAdapter or FragmentStatePagerAdapter, it is best to deal solely with getItem() and not touch instantiateItem() at all. The instantiateItem()-destroyItem()-isViewFromObject() interface on PagerAdapter is a lower-level interface that FragmentPagerAdapter uses to im...
Are there any smart cases of runtime code modification?
Can you think of any legitimate (smart) uses for runtime code modification (program modifying it's own code at runtime)?
1...
Why does python use 'else' after for and while loops?
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It's a strange construct even to seasoned Python coders. When used in conjunction with for-loops it basically means "find some item in the iterable, else if none was found do ...". As in:
found_obj = None
for obj in objects:...
java.util.Date vs java.sql.Date
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Congratulations, you've hit my favorite pet peeve with JDBC: Date class handling.
Basically databases usually support at least three forms of datetime fields which are date, time and timestamp. Each of these have a corresponding class in JDBC and ea...
Why should I use version control? [closed]
I was reading a blog where the writer said this
20 Answers
20
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Is there a way to style a TextView to uppercase all of its letters?
...sign a xml attribute or style to a TextView that will make whatever text it has in ALL CAPITAL LETTERS.
7 Answers
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What to do Regular expression pattern doesn't match anywhere in string?
...ause you are NOT trying to match balanced tags-- THAT would be impossible with regex! But you are only matching what's in one tag, and that's perfectly regular.
Here's the problem, though. You can't do it with just one regex... you need to do one match to capture an <input> tag, then do furth...
Transitions on the CSS display property
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You can concatenate two transitions or more, and visibility is what comes handy this time.
div {
border: 1px solid #eee;
}
div > ul {
visibility: hidden;
opacity: 0;
transition: visibility 0s, opacity 0.5s linear;
}
div:hover >...
Why must a lambda expression be cast when supplied as a plain Delegate parameter
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A lambda expression can either be converted to a delegate type or an expression tree - but it has to know which delegate type. Just knowing the signature isn't enough. For instance, suppose I have:
public delegate void Action1();
public delegate voi...