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Does it make sense to use “as” instead of a cast even if there is no null check? [closed]
...ng for a NullReferenceException or ArgumentNullException or even a logical error sometime in the future. In general, an as expression that's not followed by a null check somewhere is a code smell.
On the other hand, if you are not sure about the cast and expect it to fail, you should use as instead...
Create a devise user from Ruby console
...irmation => 'password')
u.save
if this returns false, you can call
u.errors
to see what's gone wrong.
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PHP exec() vs system() vs passthru()
...n status"). Zero usually means it was successful, other values are usually error codes.
Other misc things to be aware of:
The shell_exec() and the backticks operator do the same thing.
There are also proc_open() and popen() which allow you to interactively read/write streams with an executing co...
How do you take a git diff file, and apply it to a local branch that is a copy of the same repositor
...
Thanks for the reply, but that caused an error saying, patch failed: filename.php:202 error:filename.php: patch does not apply. The good news is that its not the first filename in the file, so it at least would have been able to process some of the file. Any thou...
Swapping column values in MySQL
....02 sec)
mysql> update z set c1 = c1 ^ c2, c2 = c1 ^ c2, c1 = c1 ^ c2;
ERROR 1264 (22003): Out of range value for column 'c1' at row 2
mysql> update z set c1 = c1 + c2, c2 = c1 - c2, c1 = c1 - c2;
ERROR 1264 (22003): Out of range value for column 'c1' at row 3
mysql> select * from z;
+---...
Is it possible to delete an object's property in PHP?
... object.
unset($object[$key])
Update
Newer versions of PHP throw fatal error Fatal error: Cannot use object of type Object as array as mentioned by @CXJ . In that case you can use brackets instead
unset($object{$key})
...
How to add calendar events in Android?
...n to avoid java.lang.IllegalArgumentException column visibility is invalid error */
/*eventValues.put("visibility", 3); // visibility to default (0),
// confidential (1), private
// (2), or public (3):
eventValu...
How to detect Adblock on my website?
...your layout gets distorted or ad loads slowly, user can catch a glimpse of error that doesn't relate to him. Also be aware that Adblock is taking measures to block obtrusive messages targeted at ABP users. If you want to ask user for unblocking, do it through simple hideable message that sits outsi...
What is stack unwinding?
... world" ); // will be properly destructed
if ( x ) throw std::runtime_error( "boom" );
delete [] pleak; // will only get here if x == 0. if x!=0, throw exception
}
int main()
{
try
{
func( 10 );
}
catch ( const std::exception& e )
{
return 1;
}
...
How to sort with a lambda?
...in place of binding an instance method. However, the code above yields the error:
3 Answers
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