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Why does String.valueOf(null) throw a NullPointerException?
... is overloaded:
String.valueOf(Object)
String.valueOf(char[])
Java Specification Language mandates that in these kind of cases, the most specific overload is chosen:
JLS 15.12.2.5 Choosing the Most Specific Method
If more than one member method is both accessible and applicable to a method...
How do I get the current username in Windows PowerShell?
... This method includes the domain name and username. Definitely beneficial if you have multiple domains in play.
– Ryan Gates
Feb 16 '16 at 17:00
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How can I remove the outline around hyperlinks images?
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Please note that the focus styles are there for a reason: if you decide to remove them, people who navigate via the keyboard only don't know what's in focus anymore, so you're hurting the accessibility of your website.
(Keeping them in place also helps power users that don't like t...
insert a NOT NULL column to an existing table
...BLE MY_TABLE ALTER COLUMN STAGE INT NOT NULL
GO
Another option is to specify correct default value for your column:
ALTER TABLE MY_TABLE ADD STAGE INT NOT NULL DEFAULT '0'
UPD: Please note that answer above contains GO which is a must when you run this code on Microsoft SQL server. If you wan...
How do I forward declare an inner class? [duplicate]
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You can use friend to work around this, if you want.
– Erik Aronesty
Jun 14 '16 at 16:32
5
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How do I find the PublicKeyToken for a particular dll?
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If you have the DLL added to your project, you can open the csproj file and see the Reference tag.
Example:
<Reference Include="System.Web.Mvc, Version=3.0.0.1, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processor...
Invalidating JSON Web Tokens
...t on context).
3) Just keep token expiry times short and rotate them often
If you keep the token expiry times at short enough intervals, and have the running client keep track and request updates when necessary, number 1 would effectively work as a complete logout system. The problem with this metho...
BindingFlags.IgnoreCase not working for Type.GetProperty()?
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You've overwritten the default look-up flags, if you specify new flags you need to provide all the info so that the property can be found. For example: BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance
...
iPhone viewWillAppear not firing
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If you use a navigation controller and set its delegate, then the view{Will,Did}{Appear,Disappear} methods are not invoked.
You need to use the navigation controller delegate methods instead:
navigationController:willShowVi...
clearing a char array c
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It depends on how you want to view the array. If you are viewing the array as a series of chars, then the only way to clear out the data is to touch every entry. memset is probably the most effective way to achieve this.
On the other hand, if you are choosing to view th...