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Is there a way to avoid null check before the for-each loop iteration starts? [duplicate]
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@Dataknife More like it just does the casting for you. There are no generics types at runtime with either case, and the implementation of emptyList() internally contains the cast (with a suppression on unchecked too).
– Edwin Buck
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How do I drag and drop files into an application?
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Is the (string[]) cast safe for any FileDrop-formatted drop? That is, is it possible to generate a FileDrop that will cause an illegal cast exception to string[]? I'm having trouble figuring that out from the docs.
– kd...
glob exclude pattern
...t sets, but this kind of operation only works on sets, hence why neutrinus cast it. If you need it to remain a list, simply wrap the entire operation in a cast: list(set(glob("*")) - set(glob("eph")))
– Nathan Smith
Aug 10 '17 at 21:48
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How is null + true a string?
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null will be cast to null string, and there is implicit converter from bool to string so the true will be cast to string and then, + operator will be applied: it's like: string str = "" + true.ToString();
if you check it with Ildasm:
st...
Parsing boolean values with argparse
...e,True], you end up with both "False" and "True" considered True (due to a cast from string to bool?). Maybe related issue
– dolphin
Jul 20 '13 at 1:03
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How can I pass a member function where a free function is expected?
...n using a void* interface as they remove the potential for errors due to a cast to the wrong type.
To clarify how to use a function pointer to call a member function, here is an example:
// the function using the function pointers:
void somefunction(void (*fptr)(void*, int, int), void* context) {
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SQL-Server: Error - Exclusive access could not be obtained because the database is in use
...@@spid
while (@spid is not null)
begin
print 'Killing process ' + cast(@spid as varchar) + ' ...'
set @sql = 'kill ' + cast(@spid as varchar)
exec (@sql)
select
@spid = min(spid)
from
master..sysprocesses
where
dbid = db_id('<database_n...
Enable 'xp_cmdshell' SQL Server
...ncedOptions int
declare @prevXpCmdshell int
select @prevAdvancedOptions = cast(value_in_use as int) from sys.configurations where name = 'show advanced options'
select @prevXpCmdshell = cast(value_in_use as int) from sys.configurations where name = 'xp_cmdshell'
if (@prevAdvancedOptions = 0)
begin...
Java JUnit: The method X is ambiguous for type Y
...tages:
Compares floating point values as they are supposed to
No need to cast, as the three argument assert only applyes to doubles, not to generic Objects
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Difference between Covariance & Contra-variance
... covariance exists within the implementation where a DuckEgg is implicitly cast to the BirdEgg out/return type? Either way, please clear my confusion.
– Suamere
Dec 10 '15 at 21:36
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