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Convert a Map to a POJO
...o = mapper.convertValue(map, MyPojo.class);
No need to convert into JSON string or something else; direct conversion does much faster.
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How to make vim paste from (and copy to) system's clipboard?
...efault, but if you install the vim-gtk or vim-gtk3 package you can get the extra features nonetheless.
You also may want to have a look at the 'clipboard' option described in :help cb. In this case you can :set clipboard=unnamed or :set clipboard=unnamedplus to make all yanking/deleting operations a...
Parsing JSON giving “unexpected token o” error [duplicate]
I am having a problem parsing simple JSON strings. I have checked them on JSONLint and it shows that they are valid. But when I try to parse them using either JSON.parse or the jQuery alternative it gives me the error unexpected token o :
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Regular expression to match any character being repeated more than 10 times
...ckslashes, e.g. Emacs would make you write \(.\)\1\{9,\} here.
If a whole string should consist of 9 or more identical characters, add anchors around the pattern:
my $regex = qr/^(.)\1{9,}$/;
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C/C++ Struct vs Class
... examples given:
struct Pair { // the members can vary independently
string name;
int volume;
};
// but
class Date {
public:
// validate that {yy, mm, dd} is a valid date and initialize
Date(int yy, Month mm, char dd);
// ...
private:
int y;
Month m;
char d; //...
Create Directory if it doesn't exist with Ruby
... system will launch /bin/sh to parse the mkdir -p "foo/bar" string and then the shell will run /bin/mkdir. So you're doing extra work (create the command string, launch /bin/sh to pull it apart again) and some of that extra work leaves you open to shell injection attacks (spend some t...
What is stack unwinding?
... char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly destructed
if ( x ) throw std::runtime_error( "boom" );
delete [] pleak; // will only get here if x == 0. if x!=0, throw exception
}
int main()
{
try
{
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Why is reading lines from stdin much slower in C++ than Python?
I wanted to compare reading lines of string input from stdin using Python and C++ and was shocked to see my C++ code run an order of magnitude slower than the equivalent Python code. Since my C++ is rusty and I'm not yet an expert Pythonista, please tell me if I'm doing something wrong or if I'm mis...
What does the @ symbol represent in objective-c?
...@ symbol. It is used in different scenarios, for example at the start of a string or to synthesise accessor methods.
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Why is the use of alloca() not considered good practice?
...pers when I couldn't fix it), it wasn't straight alloca, it was one of ATL string conversion macros.
So the lesson is - do not use alloca in functions that you think might be inlined.
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