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How can I hash a password in Java?
I need to hash passwords for storage in a database. How can I do this in Java?
13 Answers
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Is it safe to check floating point values for equality to 0?
...quality between double or decimal type values normally, but I'm wondering if 0 is a special case.
9 Answers
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What is the performance cost of having a virtual method in a C++ class?
Having at least one virtual method in a C++ class (or any of its parent classes) means that the class will have a virtual table, and every instance will have a virtual pointer.
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Split string into an array in Bash
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IFS=', ' read -r -a array <<< "$string"
Note that the characters in $IFS are treated individually as separators so that in this case fields may be separated by either a comma or a space rather than the sequence of t...
List comprehension on a nested list?
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Here is how you would do this with a nested list comprehension:
[[float(y) for y in x] for x in l]
This would give you a list of lists, similar to what you started with except with floats instead of strings. If you want one flat list then you would use [float(y) for x in l for y in x].
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How to parse JSON in Python?
... is currently receiving a JSON message in python which I need to get bits of information out of. For the purposes of this, let's set it to some simple JSON in a string:
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Non-type template parameters
...ime. They could change during runtime, which would require the generation of a new template during runtime, which isn't possible because templates are a compile-time concept.
Here's what the standard allows for non-type template parameters (14.1 [temp.param] p4):
A non-type template-parameter shall...
Can we have functions inside functions in C++?
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Modern C++ - Yes with lambdas!
In current versions of c++ (C++11, C++14, and C++17), you can have functions inside functions in the form of a lambda:
int main() {
// This declares a lambda, which can be called just like a function
auto print_message = [](std::string m...
How can I check the extension of a file?
I'm working on a certain program where I need to do different things depending on the extension of the file. Could I just use this?
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How can I deploy an iPhone application from Xcode to a real iPhone device?
How can I deploy an iPhone application from Xcode to real iPhone device without having a US$99 Apple certificate?
12 Answer...