I am trying to take a string, that I know represents a decimal, from a JSON object and assign it to a double in C++.

One would expect that `asDouble()` does the job, but this is not the case. For example if we have the array `["0.4983", "4387"]` sitting in a variable `Json::Value arr`, doing

```
double x = arr[0].asDouble()

```

throws an exception `Value is not convertible to double.`

What is the recommended way of doing this (in C++ 11)?