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In Swift how to call method with parameters on GCD main thread?
In my app I have a function that makes an NSRURLSession and sends out an NSURLRequest using
9 Answers
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Casting a variable using a Type variable
...gn of code smell when you want to cast a something to a something else without handling an actual type. With proper interfaces that shouldn't be necessary 99.9% of the times. There are perhaps a few edge cases when it comes to reflection that it might make sense, but I would recommend to avoid those...
keytool error Keystore was tampered with, or password was incorrect
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Though I figured it out of my own. "Either delete .keystore from C:\users\abc> location and try the command" is the right solution.
– C4CodeE4Exe
Aug 5 '13 at 6:04
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Django REST framework: non-model serializer
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Django-rest-framework works well even without tying it to a model. Your approach sounds ok, but I believe you can trim some of the steps to get everything working.
For example, rest framework comes with a few built-in renderers. Out of the box it can return JSON and...
SVN: Ignore some directories recursively
... as an option, so you can do this, with two downsides:
you have to check out the entire repository (or at least all directories therein), and
you have to remember to set the svn:ignore property whenever you add a new directory
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Best way to pretty print a hash
...large hash with nested arrays and hashes. I would like to simply print it out so it 'readable' to the user.
12 Answers
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What is the “volatile” keyword used for?
I read some articles about the volatile keyword but I could not figure out its correct usage. Could you please tell me what it should be used for in C# and in Java?
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differentiate null=True, blank=True in django
... blank
models.DateTimeField(null=True) # NULL allowed, but must be filled out in a form
Obviously, Those two options don't make logical sense to use (though there might be a use case for null=True, blank=False if you want a field to always be required in forms, optional when dealing with an objec...
Secure hash and salt for PHP passwords
...80 billion hashes/second (respectively).
Don't mix bcrypt and with the raw output of hash(), either use hex output or base64_encode it. (This applies to any input that may have a rogue \0 in it, which can seriously weaken security.)
Dos
Use scrypt when you can; bcrypt if you cannot.
Use PBKDF2 i...
Delete all lines beginning with a # from a file
... For linux noobs like me: sed '/^#/ d' < inputFile.txt > outputFile.txt
– Neil McGuigan
Jul 28 '14 at 19:12
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