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mongodb count num of distinct values per field/key
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MongoDB has a distinct command which returns an array of distinct values for a field; you can check the length of the array for a count.
There is a shell db.collection.distinct() helper as well:
> db.countries.distinct('country');
[ "Spain", "Engl...
What does the arrow operator, '->', do in Java?
...ssions is
(Parameters) -> { Body } where the -> separates parameters and lambda expression body.
The parameters are enclosed in parentheses which is the same way as for methods and the lambda expression body is a block of code enclosed in braces.
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Android: combining text & image on a Button or ImageButton
I'm trying to have an image (as the background) on a button and add dynamically, depending on what's happening during run-time, some text above/over the image.
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Ruby's ||= (or equals) in JavaScript?
...s ||= mechanism. If a variable doesn't exist or is nil , then create it and set it equal to something:
6 Answers
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Why Qt is misusing model/view terminology?
...ation page they state, that they simplified the MVC to MV by merging View and Controller and they are giving the following picture:
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How to listen for a WebView finishing loading a URL?
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Extend WebViewClient and call onPageFinished() as follows:
mWebView.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
// do your stuff here
}
});
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How do I configure Maven for offline development?
... present in your local repository.
– Thorbjørn Ravn Andersen
May 3 '14 at 16:01
11
Unfortunately...
text-overflow:ellipsis in Firefox 4? (and FF5)
...TextBox').val().length > limit) {
// -4 to include the ellipsis size and also since it is an index
var trimmedText = $('#limitedWidthTextBox').val().substring(0, limit - 4);
trimmedText += ellipsis;
$('#limitedWidthTextBox').val(trimmedText);
}
I understand that there should be som...
Dark theme in Netbeans 7 or 8
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Darcula
UPDATE 2016-02: NetBeans 8 now has a Darcula plugin, better and more complete than the alternatives discussed in old version of this Answer.
The attractive and productive Darcula theme in JetBrains IntelliJ is now available in NetBeans 8.0 & 8.1!
The Real Thing
This plugin p...
NameError: name 'self' is not defined
...ot refer each other.
It's a common pattern to default an argument to None and add a test for that in code:
def p(self, b=None):
if b is None:
b = self.a
print b
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