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Convert ArrayList to String[] array [duplicate]
... To provide an explanation as to what is going on here, the JVM doesn't know how to blindly downcast Object[] (the result of toArray()) to String[]. To let it know what your desired object type is, you can pass a typed array into toArray(). The typed array can be of any size (new String[1] is vali...
How to convert wstring into string?
... + ws.length(), from_next, &to[0], &to[0] + to.size(), to_next);
if (result == converter_type::ok or result == converter_type::noconv) {
const std::string s(&to[0], to_next);
std::cout <<"std::string = "<<s<<std::endl;
}
}
This will usually work for Li...
Simpler way to put PDB breakpoints in Python code?
... whatever other languages you use.
2019 Update (Python 3.7+)
Python 3.7+ now has the builtin breakpoint() which can replace the previous import pdb; pdb.set_trace() in vim. It still works the same.
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For files in directory, only echo filename (no path)
How do I go about echoing only the filename of a file if I iterate a directory with a for loop?
5 Answers
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RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
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If you need one single regex, try:
(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*\W)
A short explanation:
(?=.*[a-z]) // use positive look ahead to see if at least one lower case letter exists
(?=.*[A-Z]) // use positi...
Visual Studio Copy Project
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This is incredibly useful, how did I not know about this before? Thanks!
– Aldarrion
Jan 8 '18 at 17:23
5
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How to implement a tree data-structure in Java? [closed]
...sistently using the Node class. Instead I name a variable 'tree' or 'root' if it needs to be clear that you are dealing with the root Node of a tree.
– jvdbogae
Oct 9 '12 at 7:43
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What is the right way to override a setter method in Ruby on Rails?
I am using Ruby on Rails 3.2.2 and I would like to know if the following is a "proper"/"correct"/"sure" way to override a setter method for a my class attribute.
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What are the benefits of functional programming? [closed]
...f". The paradigm will leak over into your other OOP work and can help simplify your development there. You can approach problems from a "compute this output from this input" and "compose these two functions that compute new data" instead of "wait---what was the state of some shared variable over the...
Git push existing repo to a new and different remote repo server?
...upstream
git remote add origin URL_TO_GITHUB_REPO
git push origin master
Now you can work with it just like any other github repo. To pull in patches from upstream, simply run git pull upstream master && git push origin master.
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