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mongo group query how to keep fields
Everybody.
In mongo group query, the result shows only the key(s) in arguments. How to keep the first document in each group like mysql query group.
for example:
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Difference between int[] array and int array[]
I have recently been thinking about the difference between the two ways of defining an array:
25 Answers
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Why I cannot cout a string?
Why I cannot cout string like this:
7 Answers
7
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PostgreSQL: Drop PostgreSQL database through command line [closed]
...a superuser or the database owner to be able to drop it.
You can also check the pg_stat_activity view to see what type of activity is currently taking place against your database, including all idle processes.
SELECT * FROM pg_stat_activity WHERE datname='database name';
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Android Use Done button on Keyboard to click button
Ok in my app I have a field for the user to input a number. I have the field set to only accept numbers. When the user clicks on the field it brings up the keyboard. On the keyboard (on ICS) there is a done button. I would like for the done button on the keyboard to trigger the submit button i have ...
How to call Base Class's __init__ method from the child class? [duplicate]
...self).__init__()
class BaseClass(object):
def __init__(self, *args, **kwargs):
pass
class ChildClass(BaseClass):
def __init__(self, *args, **kwargs):
super(ChildClass, self).__init__(*args, **kwargs)
Your indentation is incorrect, here's the modified code:
class Car(obje...
Android Min SDK Version vs. Target SDK Version
... applications for Android, what is the difference between Min and Target SDK version? Eclipse won't let me create a new project unless Min and Target versions are the same!
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What does “@private” mean in Objective-C?
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Text vertical alignment in WPF TextBlock
How do I assign vertical center alignment to the text inside a TextBlock? I found TextAlignment property but it is for horizontal text alignment. How do I do it for vertical text alignment?
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What's the easiest way to call a function every 5 seconds in jQuery? [duplicate]
...You don't need jquery for this, in plain javascript, the following will work!
window.setInterval(function(){
/// call your function here
}, 5000);
To stop the loop you can use
clearInterval()
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