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How do I create a unique constraint that also allows nulls?
...R TABLE dbo.Party ADD SamAccountNameUnique
AS (Coalesce(SamAccountName, Convert(varchar(11), PartyID)))
ALTER TABLE dbo.Party ADD CONSTRAINT UQ_Party_SamAccountName
UNIQUE (SamAccountNameUnique)
You simply have to put something in the computed column that will be guaranteed unique across the...
Why does sizeof(x++) not increment x?
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From the C99 Standard (the emphasis is mine)
6.5.3.4/2
The sizeof operator yields the size (in bytes) of its operand, which may be an expression or the parenthesized name of a type. The size is determined from the type of the opera...
Do you need to dispose of objects and set them to null?
Do you need to dispose of objects and set them to null, or will the garbage collector clean them up when they go out of scope?
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Best way to store date/time in mongodb
... use in your map-reduce jobs, for example.
If you need to, you can easily convert Date objects to and from Unix timestamps1), using the getTime() method and Date(milliseconds) constructor, respectively.
1) Strictly speaking, the Unix timestamp is measured in seconds. The JavaScript Date object mea...
Accessing constructor of an anonymous class
Lets say I have a concrete class Class1 and I am creating an anonymous class out of it.
10 Answers
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How to send password securely over HTTP?
...ser:password@your.domain.com/login (Chrome, for example will automatically convert it into Authorization header)
IMPORTANT:
As pointed out by @zaph in his comment below, sending sensitive info as GET query is not good idea as it will most likely end up in server logs.
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Golang: How to pad a number with zeros when printing?
...d|%6d|\n", 12, 345)
Notice the 0 in %06d, that will make it a width of 6 and pad it with zeros. The second one will pad with spaces.
You can see it in action here: http://play.golang.org/p/cinDspMccp
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Checking if an Android application is running in the background
... completely reliable:
The right solution (credits go to Dan, CommonsWare and NeTeInStEiN)
Track visibility of your application by yourself using Activity.onPause, Activity.onResume methods. Store "visibility" status in some other class. Good choices are your own implementation of the Application o...
Foreach loop, determine which is the last iteration of the loop
I have a foreach loop and need to execute some logic when the last item is chosen from the List , e.g.:
26 Answers
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How can I parse a local JSON file from assets folder into a ListView?
...ently developing a physics app that is supposed to show a list of formulas and even solve some of them (the only problem is the ListView )
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