Advertisements I encountered an error saying that "Unable to cast object of type ‘System.Int16‘ to type ‘System.Int32‘." Isn’t it too unlogical? How come? When I try the following on immediate windows, the output as such that reader.GetInt16(mycolumn_ordinal_value) 999 reader.GetInt32(mycolumn_ordinal_value) Exception thrown: ‘System.InvalidCastException’ in Microsoft.Data.SqlClient.dll At DB level (sqlserver), it is defined as mycolumn smallint. When… Read More Casting from 'System.Int16' to type 'System.Int32'

Advertisements In a big library, I had a ‘bug’ because a function which accept only float but not int def foo(penalty: float): if not isinstance(penalty, float): raise ValueError(f"`penalty` has to be a float, but is {penalty}") # some instruction I would like to open a PR with the following : def foo(penalty: int | float):… Read More Are there good reason to accept float but not int in a function in Python?

Advertisements I’m currently facing an issue while trying to convert a variable from type double to int in C++. When using the static_cast or int() operator for the conversion, the result doesn’t seem to be correct. Can someone guide me on how to properly perform this conversion? #include <iostream> int main() { double myDouble =… Read More Issue with Type Casting in C++

Advertisements I’ve tried all the ways I can think of to convert type *int32 to type *int64 in Go, but no avail https://go.dev/play/p/W2X0HEnn79q Somebody help please. >Solution : You cannot convert an *int32 to *int64. One is a pointer pointing to a 4-byte location, the other is a pointer pointing to an 8-byte location. You… Read More Go, cannot convert type *int32 to type *int64

Advertisements I’m learning how to build a compiler through a YouTube video, and there’s a part where there’s a type conversion error, in the locals.Add(parameter, value); section there’s this error from Visual Studio for Mac, saying that the variable parameter with the type ParameterSymbol can’t be converted to VariableSymbol. Argument 1: cannot convert from ‘Compiler.SupportedExpressions.Symbols.ParameterSymbol’… Read More Is type conversion having a covariance error?

Advertisements I need to convert this type of nvarchar field to a date. The data in the field called F2 looks like this. 09222018. i want to convert to a date and have it look like 09/22/2018. I’ve tried this, and get incorrect syntax. select f2, cast(f2,as datetime) FROM Testbk tried this select f2, convert(nvarchar,f2,101)… Read More Convert a simple text field date to a date in sql

Advertisements I have a function that takes in a dynamic type object. The function does work to parse that object then returns back some information about what it parsed. For some weird reason when I take the returned object and store it into another variable, that new variable doesn’t check to see that the object… Read More C# type casting isn't checked when a function takes a dynamic object as input parameter

Advertisements I have a query that grabs a yyyy-MM-dd format from a large storage field by substringing, so the value is automatically a varchar. An example of the entire record’s contents is below: EmployeeName$Test User Email$test@test.com ADUsername$tuser TermDate$2023-07-13 EmployeeNumber$12345 Department$Tech The following SQL query works and returns all data correctly, where TermDateString is never null… Read More SQL Convert Varchar to Date

Advertisements Take a look at this MVCE: abstract class Bar class BarHolder(val barFunctor : Bar.()-> Unit) fun <T : Bar>foo(bar: T.() -> Unit) { val activeRequest = BarHolder(bar as (Bar.() -> Unit)) } The cast bar as (Bar.() -> Unit) is marked as unchecked. But I can’t think of a scenario where the cast fails… Read More Why is this cast in my generic Kotlin function unchecked?

Advertisements Problem: when write type cast operator for object, i want to change state of object’s field, who calls cast-operation. Question: how can i change state of field in object, which one call cast operator? Example below: #include <iostream> class myClass { public: int field; int res; myClass() { field = 0; res = -1;… Read More Change object's field in type cast C++