大约有 46,000 项符合查询结果（耗时：0.0379秒） [XML]
What is a serialVersionUID and why should I use it?
... read
Unnecessary code: Redundant null check
Unnecessary code: Unnecessary cast or 'instanceof'
and many more.
share
|
improve this answer
|
follow
|
...
Why does an overridden function in the derived class hide other overloads of the base class?
... interface. So maybe d->foo() won't get you the "Is-a Base", but static_cast<Base*>(d)->foo() will, including dynamic dispatch.
– Kerrek SB
Jan 9 '14 at 13:36
12
...
SQL WHERE.. IN clause multiple columns
...te that if your columns are numeric, some SQL dialects will require you to cast them to strings first. I believe SQL server will do this automatically.
To wrap things up: As usual there are many ways to do this in SQL, using safe choices will avoid suprises and save you time and headaces in the l...
Is there a wikipedia API just for retrieve content summary?
...
@LaurynasG You can cast the object to an array and then grab it like this: $extract = current((array)$json_query->query->pages)->extract
– MarcGuay
Mar 15 '16 at 21:57
...
GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY”?
...u don't. You have an array of objects of your type. You can't just try and cast the result like that and expect it to magically work ;)
The User guide for Gson Explains how to deal with this:
https://github.com/google/gson/blob/master/UserGuide.md
This will work:
ChannelSearchEnum[] enums = gson...
Just what is an IntPtr exactly?
...sic pointer arithmetic.
In order to dereference an IntPtr, you can either cast it to a true pointer (an operation which can only be performed in "unsafe" contexts) or you can pass it to a helper routine such as those provided by the InteropServices.Marshal class. Using the Marshal class gives the i...
How to create id with AUTO_INCREMENT on Oracle?
...r replace trigger FOO_trg
before insert on FOO
for each row
begin
select cast(sys_guid() as varchar2(32)) into :new.x from dual; -- string version
-- select sys_guid() into :new.x from dual; -- raw version
end;
/
update:
Oracle 12c introduces these two variants that don't...
Populate data table from data reader
...lumn. lines in the dtSchema foreach loop because it said it was an illegal cast to bool on (bool)drow["IsUnique"]. I didn't need them, getting the column names in order to populate the new DataTable is enough. This managed to help me overcome a ds.Fill(adapter) issue where I could not load a large t...
How to increment a pointer address and pointer's value?
...*p)++ => 5
*(p)++ => 5
*++p => 0
*(++p) => 0
I cast the pointer addresses to ints so they could be easily compared.
I compiled it with GCC.
share
|
improve this answer
...
What is the difference between gravity and layout_gravity in Android?
...y;
...
Button button = (Button) findViewById(R.id.MyButtonId);
// need to cast to LinearLayout.LayoutParams to access the gravity field
LayoutParams params = (LayoutParams)button.getLayoutParams();
params.gravity = Gravity.BOTTOM;
button.setLayoutParams(params);
For horizontal LinearLayout conta...