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Multiple Inheritance in C#
... Is it possible to have multiple inheritance and while having upcasts and downcasts be identity-preserving? The solutions I know of for the problems of multiple inheritance revolve around having casts that are not identity-preserving (if myFoo is of type Foo, which inherits from Moo and ...
What is the maximum length of latitude and longitude? [closed]
... approximately 10cm precision, whilst only using 5 bytes of storage.
e.g. CAST(123.456789 as decimal(9,6)) as [LatOrLong]
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Comparator.reversed() does not compile using lambda
...d to provide either an explicit lambda, an exact method ref, a target type cast, or explicit type witnesses for the generic method call to provide the additional type information needed to proceed.
– Brian Goetz
Aug 7 '14 at 16:02
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Platform independent size_t Format specifiers in c?
... C89/C90. If you're aiming for C89-compliant code, the best you can do is cast to unsigned long and use the l length modifier instead, e.g. printf("the size is %lu\n", (unsigned long)size);; supporting both C89 and systems with size_t larger than long is trickier and would require using a number of...
Filtering a list of strings based on contents
...abc']
In Python 3, it returns an iterator instead of a list, but you can cast it:
>>> list(filter(lambda k: 'ab' in k, lst))
['ab', 'abc']
Though it's better practice to use a comprehension.
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Why is the default value of the string type null instead of an empty string?
..., and (2) an unfortunate extra layer of boxing indirection any time it was cast to Object. Given that the heap representation of string is unique, having special treatment to avoid extra boxing wouldn't have been much of a stretch (actually, being able to specify non-default boxing behaviors would ...
How to detect if a variable is an array
...ies
'0' in Object(obj) // include array-likes with inherited entries
The cast to object is necessary to work correctly for array-like primitives (ie strings).
Here's the code for robust checks for JS arrays:
function isArray(obj) {
return Object.prototype.toString.call(obj) === '[object Arra...
What is the good python3 equivalent for auto tuple unpacking in lambda?
...th to have a namedtuple, and use the assignment expression to effectively "cast" the incoming sequence to the namedtuple:
>>> from collections import namedtuple
>>> point = namedtuple("point", "x y")
>>> b = lambda s: (p:=point(*s), p.x ** 2 + p.y ** 2)[-1]
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Does PowerShell support constants?
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To use a specific type of value, say Int64, you can explicitly cast the value used in set-variable.
For instance:
set-variable -name test -value ([int64]100) -option Constant
To check,
$test | gm
And you'll see that it is an Int64 (rather than Int32, which would be normal for the...
How to create own dynamic type or dynamic object in C#?
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Anyone know why we have to type cast to access the Add method? That seems strange to me.
– Vimes
Aug 20 at 16:24
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