public static DynValue sub(ScriptExecutionContext executionContext, CallbackArguments args)
{
var arg_s = args.AsType(0, "sub", DataType.String);
var arg_i = args.AsType(1, "sub", DataType.Number, true);
var arg_j = args.AsType(2, "sub", DataType.Number, true);
var range = StringRange.FromLuaRange(arg_i, arg_j, -1);
string s = range.ApplyToString(arg_s.String);
return(DynValue.NewString(s));
}
private static DynValue PerformByteLike(DynValue vs, DynValue vi, DynValue vj, Func <int, int> filter)
{
var range = StringRange.FromLuaRange(vi, vj);
string s = range.ApplyToString(vs.String);
int length = s.Length;
var rets = new DynValue[length];
for (int i = 0; i < length; ++i)
{
rets[i] = DynValue.NewNumber(filter(s[i]));
}
return(DynValue.NewTuple(rets));
}