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What is the use of the ArraySegment class?
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In simple words: it keeps reference to an array, allowing you to have multiple references to a single array variable, each one with a different range.
In fact it helps you to use and pass sections of an array in a more structured way,...
What is the purpose of the -nodes argument in openssl?
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The option -nodes is not the English word "nodes", but rather is "no DES". When given as an argument, it means OpenSSL will not encrypt the private key in a PKCS#12 file.
To encrypt the private key, you can omit -nodes and your key will be encrypted with 3DES-...
What 'sensitive information' could be disclosed when setting JsonRequestBehavior to AllowGet
... all side-effecting operations should use POST, PUT, DELETE, etc. In other words, I just think that this 'sensitive information' error message is misleading. If the developer uses the GET method the way it should be used then everything is fine! :)
– ps_ttf
May...
Gradle, “sourceCompatibility” vs “targetCompatibility”?
... release - Generates class files for a specific VM version.
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In other words: you write a code in a source version and compile your classes to the target VM version. In order to run it e.g. on other workstation with older java version.
According to: https://docs.oracle.com/en/java/javase/11/to...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...do1X8dKMv3Y26ZQIDAQAB
-----END RSA PUBLIC KEY-----
Five hyphens, and the words BEGIN RSA PUBLIC KEY. That is your PEM DER ASN.1 PKCS#1 RSA Public key
PEM: synonym for base64
DER: a flavor of ASN.1 encoding
ASN.1: the binary encoding scheme used
PKCS#1: The formal specification that dictates repr...
What exactly do “u” and “r” string flags do, and what are raw string literals?
...n to your string literal. So when you print the 'hello\nworld' string, the words will be printed on separate lines. That's very handy!
On the other hand, there are some situations when you want to create a string literal that contains escape sequences but you don't want them to be interpreted by Py...
python numpy ValueError: operands could not be broadcast together with shapes
...mpatible when:
they are equal, or
one of them is 1
In other words, if you are trying to multiply two matrices (in the linear algebra sense) then you want X.dot(y) but if you are trying to broadcast scalars from matrix y onto X then you need to perform X * y.T.
Example:
>>>...
How to avoid having class data shared among instances?
...t, so do not get bound up in the semantics of other languages usage of the word class. In python, a class is really just an object that is used to determine how to create other objects and what their behaviors will be. Metaclasses are classes that create classes, just to further illustrate this po...
Was PreferenceFragment intentionally excluded from the compatibility package?
... so). In fact that's what the "easily" recommendation has done. In other words, if you want to use PreferenceFragment your app needs to use the built-in fragment API and deal with the deprecated methods on PreferenceActivity. Conversely, if it's important that your app use the compat. API you wil...
Difference between wait() and sleep()
...n the definitions from the Javadoc and also the meaning of the two english words but I do not see Why I should ever use sleep instead of wait? What is the benchmarking and speed difference between the two? If I can do everything that I can do with sleep why should I ever choose sleep?
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