crows | Micro library for authorization in Ruby classes

or matrices, and I want to fit the "map" 2d array inside of "cmap", which is +2 bigger, in fact I want to use "cmap" as a frame of "map", but I wanted to do without using one single array (also because I want to randomly generate the characters inside of the "map" 2d array... Did you have any suggestions?

I get some errors from this SQL code. I am making a mock database for practice. I have looked at some work around and have redone the code a few times.

Everything has been created in order (I believe). Any help would be great! Am I referencing the incorrect tables/columns? Am I referencing different Data types that shouldn't be?

Here are the errors I get:

Msg 547, Level 16, State 0, Line 186
The INSERT statement conflicted with the FOREIGN KEY constraint "fk_bookid". The conflict occurred in database "db_City_Library", table "dbo.Books", column 'BookID'.

Msg 547, Level 16, State 0, Line 63
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "fk_publisher_name_books". The conflict occurred in database "db_City_Library", table "dbo.Publisher",

Code:

thanks to the answer below by @abhishek Jebaraj I was able to adapt the code as follows by changing the not_in_lists function.

I'm running macOS on my MacBook Pro (Retina, 15-inch, Mid 2015), which has two GPUs in it, according to "About this Mac" in the Apple menu. One GPU is an AMD Radeon R9 M370X 2 GB, the other is an Intel Iris Pro 1536 MB -- the standard chips, I guess? They're the chips that were in there when I bought it, nothing I added myself.

I'm using the Swift MPS library for matrix computations; it works great on the Intel GPU, but when I select the Radeon, I only ever get back zeros from every operation, with no error reported. I've looked around for documentation on it, but I can't find anything. The only clue I have so far is that the Radeon reports "not integrated" (or at least, I think it does, based on the sample code at Finding GPUs on macOS, which is about as useful as Apple's doc ever is, meaning not very). If I've read that page correctly, this is what my two GPUs are telling me.

Device Intel Iris Pro Graphics; caps: headful, not discrete, integrated, not external

Device AMD Radeon R9 M370X; caps: headful, discrete, not integrated, not external

I can't find any doc that would suggest what I'm doing wrong. I've been all over Apple's MPS documentation, to no avail. And as I say, the code works great on the Intel GPU, so I should think it would run on the Radeon too. I've run some downloadable diagnostic tools to check on the Radeon, but it doesn't show up in the menus of those tools. So I don't even know whether this is something I'm doing wrong in the code, or if the chip itself is broken.

Below is the code, which you can build as a console app by pasting into main.swift. Find the following line:

The tables involved:

I'm trying to implement sparse matrix addition(code attached), as c++ doesn't like 2d dynamic arrays I am using three different array each to represent RowIndex, ColumnIndex, and the corresponding values.

say i added A and B to get C.

C = A.add(B)

in the add member function, I am returning the address to the newly created C matrix.

Everything works fine before returning C, as A->C has expected values inside the arrays, but once I store the C in another identifier in the main function and then print the same array, via new object I find garbage in some of the arrays.

what i've tried :

• At first I was creating the object inside the Add function and then returning the object, tried it with/without the new keyword.
• I thought it might be a problem with the scope so, Now I am using an attribute of matrix A to instantiate the new C matrix, to store the newly-created matrix and then returning the address to it.

Debugging :

• The arrays are located at the same address before and after the .add() function's use still different values are printed.

I have created a class, named: bird. Each instance of that class has two attributes:

• creed (which can be either "C" or "D" in value), and
• life (which starts with a value of 100, and changes as the program executes).

The program simulates random encounters of two live birds, the birds change the value of life after each encounter. Once reaching 0, the bird is excluded from further interactions (i.e. dead).

After several iterations, I wish to know how many birds of each creed are "alive".

I wish to run a virtual experiment, where 100 "doves" and 100 "crows" populations are interacting. I wish to make multiple encounters between random birds, each encounter changes the 'Life' value of the birds. Then, I wish to view the populations (how many survived and in what condition...)

I have two optional ideas: