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C# “as” cast vs classic cast [duplicate]
... thrown. With the as method, it results in null, which can be checked for, and avoid an exception being thrown.
Also, you can only use as with reference types, so if you are typecasting to a value type, you must still use the "classic" method.
Note:
The as method can only be used for types that c...
How to pass command line argument to gnuplot?
...file, say foo.data . Currently, I hardcoded the data file name in the command file, say foo.plt , and run command gnuplot foo.plg to plot data. However, I want to pass the data file name as a command argument, e.g. running command gnuplot foo.plg foo.data . How to parse the command line argumen...
Implementing Comments and Likes in database
...a user will be allowed to mark an entity as liked (like in FB), tag it and comment .
7 Answers
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Pass Array Parameter in SqlCommand
...t a time.
var parameters = new string[items.Length];
var cmd = new SqlCommand();
for (int i = 0; i < items.Length; i++)
{
parameters[i] = string.Format("@Age{0}", i);
cmd.Parameters.AddWithValue(parameters[i], items[i]);
}
cmd.CommandText = string.Format("SELECT * from TableA WHERE Age ...
Python append() vs. + operator on lists, why do these give different results?
...ethod however does literally what you ask: append the object on the right-hand side that you give it (the array or any other object), instead of taking its elements.
An alternative
Use extend() if you want to use a function that acts similar to the + operator (as others have shown here as well). It'...
Delete all local changesets and revert to tree
I'm using Mercurial and I've got into a terrible mess locally, with three heads. I can't push, and I just want to delete all my local changes and commits and start again with totally clean code and a clean history.
...
Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
...asked, because until fairly recently, most browsers have not been able to handle favicons in .svg format.
That's not the case anymore.
See: https://caniuse.com/#feat=link-icon-svg
1) Choose SVG as the Favicon format
Right now, in June 2020, these browsers can handle SVG Favicons:
Chrome
Firefox
Ed...
Unix - create path of folders and file
I know you can do mkdir to create a directory and touch to create a file, but is there no way to do both operations in one go?
...
How to get error information when HttpWebRequest.GetResponse() fails
I am initiating an HttpWebRequest and then retrieving it's response. Occasionally, I get a 500 (or at least 5##) error, but no description. I have control over both endpoints and would like the receiving end to get a little bit more information. For example, I would like to pass the exception mes...
The object 'DF__*' is dependent on column '*' - Changing int to double
...he DBMS (SQL Server).
To see the constraint associated with the table, expand the table attributes in Object explorer, followed by the category Constraints as shown below:
You must remove the constraint before changing the field type.
...