大约有 30,000 项符合查询结果（耗时：0.0472秒） [XML]
returning in the middle of a using block
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@JohnShedletsky In this case your function call should be wrapped with using. Like using(Stream x = FuncToReturnStream()){...} and no using inside FuncToReturnStream.
– Felix Keil
Sep 24 '15 at 12:52
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TextView Marquee not working [duplicate]
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Note that sometimes it is necessary to call TextView.setSelected(true) in code (despite setting all the necessary attributes) as per Shardul's answer so give that a try if marquee animation is not working.
– Adil Hussain
Jan ...
Objective-C Static Class Level variables
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If initialize() is guaranteed to be called only once, why do you need the conditional "if (! classVariableName)"?
– j b
Jun 28 '11 at 9:27
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Start an Activity with a parameter
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Just add extra data to the Intent you use to call your activity.
In the caller activity :
Intent i = new Intent(this, TheNextActivity.class);
i.putExtra("id", id);
startActivity(i);
Inside the onCreate() of the activity you call :
Bundle b = getIntent().getExtras()...
How to Store Historical Data
...ramework that utilizes XML for storing application data.
We use something called a Master - Detail model that at it's simplest consists of:
Master Table for example calledWidgets often just containing an ID. Will often contain data that won't change over time / isn't historical.
Detail / History ...
What is the difference between a stored procedure and a view?
...tion FROM vw_user_profile WHERE user_id = @ID
END
GO
So, later on, I can call:
dbo.getDesc 25
and I will get the description for user_id 25, where the 25 is your parameter.
There is obviously a lot more detail, this is just the basic idea.
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Django select only rows with duplicate field values
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if you add another call to values('name') after your call to annotate, you can remove the list comprehension and say Literal.objects.filter(name__in=dupes) which will allow this to all be executed in a single query.
– Pipe...
What is the intent of the methods getItem and getItemId in the Android class BaseAdapter?
...my adapter object via something like myListData.get(position) i can simply call the adapter like adapter.get(position).
The same goes for getItemId. Usually I would use this method when I want to execute some task based on the unique ID of an object in the list. This is especially useful when worki...
Convert Django Model object to dict with all of the fields intact
...ct(instance)]
return data
While this is the most complicated option, calling to_dict(instance) gives us exactly the desired result:
{'auto_now_add': datetime.datetime(2018, 12, 20, 21, 34, 29, 494827, tzinfo=<UTC>),
'foreign_key': 2,
'id': 1,
'many_to_many': [2],
'normal_value': 1,
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Android add placeholder text to EditText
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Thanks! I didn't know what they call it in android, I just know that on iOS it's called placeholder.
– Mona
Nov 22 '11 at 4:24
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