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Does a foreign key automatically create an index?
...se through a FK-relationship, you'll often need to lookup a relating table and extract certain rows based on a single value or a range of values.
So it makes good sense to index any columns involved in a FK, but a FK per se is not an index.
Check out Kimberly Tripp's excellent article "When did SQ...
Android OnClickListener - identify a button
...b1);
b2 = (Button) findViewById(R.id.b2);
b1.setOnClickListener(myhandler1);
b2.setOnClickListener(myhandler2);
...
}
View.OnClickListener myhandler1 = new View.OnClickListener() {
public void onClick(View v) {
// it was the 1st button
}
};
View.OnClickListener ...
How can I make Flexbox children 100% height of their parent?
... Please add removing height: 100% to the answer - I nearly gave up and only saw this at the last moment before reverting to absolute - which comes with all sorts of problems.
– Peter
May 2 at 10:18
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What is the size of ActionBar in pixels?
...
To retrieve the height of the ActionBar in XML, just use
?android:attr/actionBarSize
or if you're an ActionBarSherlock or AppCompat user, use this
?attr/actionBarSize
If you need this value at runtime, use this
final TypedArray styledAttributes = getContext().getTheme().obtain...
Is it possible to do a sparse checkout without checking out the whole repository first?
... sub-folders to checkout
# they are checked out immediately after this command, no need to run git pull
Note that it requires git version 2.25 installed. Read more about it here: https://github.blog/2020-01-17-bring-your-monorepo-down-to-size-with-sparse-checkout/
UPDATE:
The above git clone com...
Naming of enums in Java: Singular or Plural?
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Enums in Java (and probably enums in general) should be singular. The thinking is that you're not selecting multiple Protocols, but rather one Protocol of the possible choices in the list of values.
Note the absence of plurals: http://doc...
'id' is a bad variable name in Python
...emoved it. What a poorly named method! A generic, common name used in thousands of places (where context gives meaning). So someone decided to use it as a global name where there is no context?
– Basic
Jul 26 '16 at 14:27
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UINavigationController “back button” custom text?
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Just to clarify Tyler's comment because I did not understand this at first: Setting the backBarButtonItem in a view controllers navigationItem is setting the button that will show to get BACK to this view controller. Also note that although there is no button style for the arrow bu...
Rethrowing exceptions in Java without losing the stack trace
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Hi, InterruptedException e gives an unhandled Exception message when I add the throw e line. Not so if I replace it with the broader Exception e. How should this be done properly?
– James P.
Oct 31 '11 at 2:07
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How can I round down a number in Javascript?
... by JavaScript - can be emulated by using Math.ceil() for negative numbers and Math.floor() for positive numbers.
+3.5 => +3.0 using Math.floor()
-3.5 => -3.0 using Math.ceil()
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