Tutorial by Examples: ctypes

You can also query dynamically if you leave off the generic type. IDBConnection db = /* ... */; IEnumerable<dynamic> result = db.Query("SELECT 1 as A, 2 as B"); var first = result.First(); int a = (int)first.A; // 1 int b = (int)first.B; // 2
Using generic constructors would require the anonymous types to be named, which is not possible. Alternatively, generic methods may be used to allow type inference to occur. var anon = new { Foo = 1, Bar = 2 }; var anon2 = new { Foo = 5, Bar = 10 }; List<T> CreateList<T>(params T[] it...
The following are data types intrinsic to Fortran: integer real character complex logical integer, real and complex are numeric types. character is a type used to store character strings. logical is used to store binary values .true. or .false.. All numeric and logical intrinsic types are...
The HTML 4.01 specification provides several different types of doctypes that allow different types of elements to be specified within the document. HTML 4.01 Strict <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> Includes all...
The typing.TypeVar is a generic type factory. It's primary goal is to serve as a parameter/placeholder for generic function/class/method annotations: import typing T = typing.TypeVar("T") def get_first_element(l: typing.Sequence[T]) -> T: """Gets the first ele...
// Only accept T and U generic types that also implement Debug fn print_objects<T: Debug, U: Debug>(a: T, b: U) { println!("A: {:?} B: {:?}", a, b); } print_objects(13, 44); // or annotated explicitly print_objects::<usize, u16>(13, 44); The bounds must cover a...
If you have an instance of a generic type but for some reason don't know the specific type, you might want to determine the generic arguments that were used to create this instance. Let's say someone created an instance of List<T> like that and passes it to a method: var myList = new List&lt...
In elm-repl, type a piece of code to get its value and inferred type. Try the following to learn about the various types that exist: > 42 42 : number > 1.987 1.987 : Float > 42 / 2 21 : Float > 42 % 2 0 : Int > 'e' 'e' : Char > "e" "e" : St...
The ranges of the integer types are implementation-defined. The header <limits> provides the std::numeric_limits<T> template which provides the minimum and maximum values of all fundamental types. The values satisfy guarantees provided by the C standard through the <climits> and (&...
The following output equivalent results: class IfElseExample { public string DebugToString(object a) { if (a is StringBuilder) { return DebugToStringInternal(a as StringBuilder); } else if (a is List<string>) { ...
CREATE TABLE all_numeric_types( c_tinyint tinyint, c_smallint smallint, c_int int, c_bigint bigint, c_decimal decimal(38,3) ); Minimum and maximum data values: insert into all_numeric_types values (-128,-32768,-2147483648,-9223372036854775808,-99999999999999999999999999999999...
CREATE TABLE all_floating_numeric_types( c_float float, c_double double ); Minimum and maximum data values: insert into all_floating_numeric_types values (-3.4028235E38,-1.7976931348623157E308); insert into all_floating_numeric_types values (-1.4E-45,-4.9E-324); insert into all_floatin...
HTML 3.2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> HTML 3.2 is well supported by most browsers in use. However, HTML 3.2 has limited support for style sheets and no support for HTML 4 features such as frames and internationalization. HTML 2.0 <!DOCTYPE HTML P...
There are numerous ways to convert numeric types to strings in Julia: julia> a = 123 123 julia> string(a) "123" julia> println(a) 123 The string() function can also take more arguments: julia> string(a, "b") "123b" You can also insert (aka ...
For simple multi-threaded code, using synchronization is acceptable. However, using synchronization does have a liveness impact, and as a codebase becomes more complex, the likelihood goes up that you will end up with Deadlock, Starvation, or Livelock. In cases of more complex concurrency, using A...
Cannot add Integer and Real* - 5 + 1.0; stdIn:1.2-10.4 Error: operator and operand don't agree [overload conflict] operator domain: [+ ty] * [+ ty] operand: [+ ty] * real in expression: 5 + 1.0
Each instantiation and full specialization of the std::atomic template defines an atomic type. If one thread writes to an atomic object while another thread reads from it, the behavior is well-defined (see memory model for details on data races) In addition, accesses to atomic objects may establish...
The simple way to implement multi-threaded applications is to use Java's built-in synchronization and locking primitives; e.g. the synchronized keyword. The following example shows how we might use synchronized to accumulate counts. public class Counters { private final int[] counters; ...
NameStorage SizeDescriptionRangesmallint2 bytessmall-range integer-32768 to +32767integer4 bytesypical choice for integer-2147483648 to +2147483647bigint8 byteslarge-range integer-9223372036854775808 to +9223372036854775807decimalvariableuser-specified precision, exactup to 131072 digits before the...
NameStorage SizeDescriptionRepresentationpoint16 bytesPoint on a plane(x,y)line32 bytesInfinite line{A,B,C}lseg32 bytesFinite line segment((x1,y1),(x2,y2))box32 bytesRectangular box((x1,y1),(x2,y2))path16+16n bytesClosed path (similar to polygon)((x1,y1),...)path16+16n bytesOpen path[(x1,y1),...]pol...

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