public Optional<String> arg(final String name) {
		int index = _args.indexOf("--" + name);
		if (index == -1) index = _args.indexOf("-" + name);

		return index >= 0 && index < _args.length() - 1
			? Optional.of(_args.get(index + 1))
			: Optional.empty();
	}
Return the parameter with the given name.

@param name the parameter name
@return the parameter with the given name, if any
jenetics/src/main/java/io/jenetics/internal/util/Args.java