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When to use references vs. pointers

...fore that, there's boost::optional). Another example is to use pointers to raw memory for specific memory manipulations. That should be hidden and localized in very narrow parts of the code, to help limit the dangerous parts of the whole code base. In your example, there is no point in using a point...
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Bash: Syntax error: redirection unexpected

...lem from my Dockerfile as I had: RUN bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer) However, according to this issue, it was solved: The exec form makes it possible to avoid shell string munging, and to RUN commands using a base ...
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Is there a good JavaScript minifier? [closed]

...$(function() { alert("Hello, World!"); });' http://javascript-minifier.com/raw Or by uploading a file and redirecting to a new file: curl -X POST -s --data-urlencode 'input@ready.js' http://javascript-minifier.com/raw > ready.min.js Hope that helps. ...
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How to download an entire directory and subdirectories using wget?

...t -r --no-parent http://abc.tamu.edu/projects/tzivi/repository/revisions/2/raw/tzivi/ The Parameters are: -r //recursive Download and --no-parent // Don´t download something from the parent directory If you don't want to download the entire content, you may use: -l1 just download t...
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Fastest way to convert Image to Byte array

...about CPU resources, pick a format which doesn't bother compressing - just raw ARGB pixels, for example. But of course that will lead to a larger byte array. Note that if you pick a format which does include compression, there's no point in then compressing the byte array afterwards - it's almost c...
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std::shared_ptr of this

...g. Usually, when you are accepting new entities, you should usually accept raw pointers. Smart pointer can have their own meaning for swapping children between parents, but for general usage, you should accept raw pointers. ...
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How do I retrieve the number of columns in a Pandas data frame?

...re using read_csv method of Pandas without sep parameter or sep with ",". raw_data = pd.read_csv("a1:\aa2/aaa3/data.csv") raw_data.info() <class 'pandas.core.frame.DataFrame'> RangeIndex: 5144 entries, 0 to 5143 Columns: 145 entries, R_fighter to R_age ...
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Regular expression for letters, numbers and - _

... Go (golang) users, heads up, pattern here will result in false for empty raw string literals. Playground. Use @nonopolarity's solution below. – BentCoder Jun 27 at 18:40 ...
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GOTO still considered harmful? [closed]

...ver possible. While it's possible to use goto to produce unmaintainable, sprawling code, it nevertheless remains in modern programming languages . Even the advanced continuation control structure in Scheme can be described as a sophisticated goto. ...
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error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘c...

...{ T _val; public: Derived() {} Derived(T val): _val(val) {} T raw() {return _val;} }; int main() { Base * b = new Derived<int>(1); Derived<int> * d = dynamic_cast<Derived<int>* >(b); cout << d->raw() << endl; return 0; } dynamic_cast