gitfix(jsonrpc): read simple positional argument in getBalance

[Tommytrg]

The initial suggestion was:

  simple = params.get(1).unwrap_or(false);

But, we also have to call parse over the possible String so the one-liner would be:

  simple = params.get(1).and_then(|v| v.as_str().map(|s| s.parse().unwrap_or(false))).unwrap_or(false);

As the previous line looks a bit hard to read, I have used an if let which seems more readable.

[aesedepece]

  simple = params.get(1).and_then(|v| v.as_str().map(|s| s.parse().unwrap_or(false))).unwrap_or(false);

As the previous line looks a bit hard to read, I have used an if let which seems more readable.

@Tommytrg It doesn't look that bad if you leverage the and_then magic and parse from Value instead of str:

simple = params.get(1).and_then(Value::as_bool).unwrap_or(false);

[Tommytrg]

close #2390

[Tommytrg]

close #2390