types

相关标签：javascript jquery android 多少钱 iPhone

Universal function pointer

There is some class whi开发者_运维知识库ch have methods like: int getSomething1(); std::string getSomething2();[详细]

2023-04-12 11:15 分类：问答
What is the basic collection type in Scala?

Or in other words what is the equivalent of C# IEnumerable<开发者_JAVA百科T> in Scala? I thought it is Seq[T], but I already found out, that HashMap does not implement this, so it cannot be true.[详细]

2023-04-12 09:29 分类：问答
Will MySQL ALTER TABLE reformat field data?

I need to alter a t开发者_如何学编程able to change the Type of a column. If the current column Type is DECIMAL(8,2) and I alter that column to be DOUBLE, will the already-existing data in the column a[详细]

2023-04-12 07:12 分类：问答
How to extend family of objects (A has many B) with a more specific family of objects (A' <: A has many B' <: B)?

Sorry for the atrocious title, but I could not think of a better way of wording this. I will try to make this more clear with an example (which is not the problem that I am actually trying to solve, b[详细]

2023-04-12 04:45 分类：问答
Scala compiler cannot infer mix-in type for pattern matching

I have a use case for algebraic groups over finite permutation sets. Because I would like to use the group for various permutation classes which are otherwise unrelated, I would like to do this as a m[详细]

2023-04-12 01:52 分类：问答
Liquibase: Change a INT autoincrement column to BIGINT using modifyDataType refactoring with H2 database

I have a primary key column which is an INT column which I would like to change to a BIGINT. Our test and production environment uses MySQL, but for unit tests we use the embedded H2 database.[详细]

2023-04-11 23:25 分类：问答
Need assistance in understanding this code using malloc and pointers

Here is a little snippet of code from Wikipedia\'s article on malloc(): int *ptr; ptr = malloc(10 * sizeof (*ptr)); // Without a cast[详细]

2023-04-11 21:57 分类：问答
Total function of type (forall n . Maybe (f n)) -> Maybe (forall n . (f n))

Is it possible to write an injective function of type hard :: (forall n . Maybe (f n)) -> Maybe (forall n . (f n))[详细]

2023-04-11 21:41 分类：问答
Netbeans type info for Scala

In开发者_开发技巧 the IntelliJ Scala plugin, there is a \"Type Info\" command that when run with the mouse hovering over a variable, shows the variable\'s (inferred) type.[详细]

2023-04-11 18:48 分类：问答
Use Method by Real Type

I learned that I can use the real type of a Object to define which Method is used开发者_运维技巧, such like this:[详细]

2023-04-11 17:38 分类：问答