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How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
... ANY DEFINED BY algorithm OPTIONAL },
subjectPublicKey BIT STRING {
RSAPublicKey ::= SEQUENCE {
modulus INTEGER, -- n
publicExponent INTEGER -- e
}
}
That gives you an ASN.1 of:
SEQUENCE (2 elements)
SEQUENCE (2 elem...
Traverse a list in reverse order in Python
...d the loop index, and don't want to traverse the entire list twice, or use extra memory, I'd write a generator.
def reverse_enum(L):
for index in reversed(xrange(len(L))):
yield index, L[index]
L = ['foo', 'bar', 'bas']
for index, item in reverse_enum(L):
print index, item
...
Formatting floats without trailing zeros
...at it doesn't contain trailing zeros? In other words, I want the resulting string to be as short as possible.
18 Answers
...
FFmpeg on Android
...essage());
}
ShellDummy shell = new ShellDummy();
String mp3BitRate = "192";
try {
ffmpeg.extractAudio(in, out, audio, mp3BitRate, shell);
} catch (IOException e) {
Log.e(DEBUG_TAG, "IOException running ffmpeg" + e.getMessage());
...
Operator overloading in Java
...hich comes close to "custom" operator overloading is the handling of + for strings, which either results in compile-time concatenation of constants or execution-time concatenation using StringBuilder/StringBuffer. You can't define your own operators which act in the same way though.
For a Java-like...
How to avoid installing “Unlimited Strength” JCE policy files when deploying an application?
... // This matches Oracle Java 7 and 8, but not Java 9 or OpenJDK.
final String name = System.getProperty("java.runtime.name");
final String ver = System.getProperty("java.version");
return name != null && name.equals("Java(TM) SE Runtime Environment")
&& ver !=...
Dump a NumPy array into a csv file
...d works well for numerical data, but it throws an error for numpy.array of strings. Could you prescribe a method to save as csv for an numpy.array object containing strings?
– Ébe Isaac
Mar 25 '16 at 14:31
...
Manually raising (throwing) an exception in Python
...older versions of Python (2.4 and lower), you may still see people raising strings:
raise 'message' # really really wrong. don't do this.
In all modern versions, this will actually raise a TypeError, because you're not raising a BaseException type. If you're not checking for the right exception a...
How to lose margin/padding in UITextView?
...l cases dynamically changing heights, Apple does a bizarre thing: they add extra space at the bottom.
No, really! This would have to be one of the most infuriating things in iOS.
If you encounter the problem, here is a "quick fix" which usually helps:
...
textContainerInset = UIEdgeInsets.ze...
How to install the Raspberry Pi cross compiler on my Linux host machine?
...ow you should be able to compile your cmake programs simply by adding this extra flag: -D CMAKE_TOOLCHAIN_FILE=$HOME/raspberrypi/pi.cmake.
Using a cmake hello world example:
git clone https://github.com/jameskbride/cmake-hello-world.git
cd cmake-hello-world
mkdir build
cd build
cmake -D CMAKE_TO...