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Cannot ping AWS EC2 instance
I have an EC2 instance running in AWS. When I try to ping from my local box it is not available.
25 Answers
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Delete keychain items when an app is uninstalled
I am using idandersen's scifihifi-iphone code for keychain and save password using
8 Answers
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How to create a hex dump of file containing only the hex characters without spaces in bash?
How do I create an unmodified hex dump of a binary file in Linux using bash? The od and hexdump commands both insert spaces in the dump and this is not ideal.
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Facebook API - How do I get a Facebook user's profile image through the Facebook API (without requir
I'm working on a CMS that fetches a user's profile image from their Facebook URL (that is, http://facebook.com/users_unique_url ). How can I accomplish this? Is there a Faceboook API call that fetches a user's profile image URL without the user needing to Allow the application?
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How do I query for all dates greater than a certain date in SQL Server?
I'm trying:
5 Answers
5
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How does type Dynamic work and how to use it?
I heard that with Dynamic it is somehow possible to do dynamic typing in Scala. But I can't imagine how that might look like or how it works.
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Convert InputStream to byte array in Java
How do I read an entire InputStream into a byte array?
34 Answers
34
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Generate a random alphanumeric string in Cocoa
...a method, pass it the length and have it generate a random alphanumeric string.
20 Answers
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Is there a quicker / better way to clear the iPhone Simulator cache than deleting its directory?
So I'm still reasonably new to iOS development and I'm finding myself quite regularly needing to delete either DerivedData, or the contents of the iPhone Simulator directory, to get things to actually execute from my code. Clean in Xcode doesn't do the same as emptying those directories, right? And ...
Difference between signed / unsigned char [duplicate]
So I know that the difference between a signed int and unsigned int is that a bit is used to signify if the number if positive or negative, but how does this apply to a char ? How can a character be positive or negative?
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