大约有 48,000 项符合查询结果（耗时：0.0521秒） [XML]
Efficient SQL test query or validation query that will work across all (or most) databases
...RE 1=0" - otherwise the call might be very slow. By the way, both SELECT 1 and SELECT 1 FROM DUAL also work with H2.
– Thomas Mueller
Sep 9 '10 at 14:01
2
...
The maximum value for an int type in Go
...omplement arithmetic, you can infer the
min/max constant values for int and uint. For example,
const MaxUint = ^uint(0)
const MinUint = 0
const MaxInt = int(MaxUint >> 1)
const MinInt = -MaxInt - 1
As per @CarelZA's comment:
uint8 : 0 to 255
uint16 : 0 to 65535
uint32 : 0 to 4294...
Which MySQL data type to use for storing boolean values
...
For MySQL 5.0.3 and higher, you can use BIT. The manual says:
As of MySQL 5.0.3, the BIT data type is used to store bit-field
values. A type of BIT(M) enables storage of M-bit values. M can range
from 1 to 64.
Otherwise, according to the M...
Image comparison - fast algorithm
I'm looking to create a base table of images and then compare any new images against that to determine if the new image is an exact (or close) duplicate of the base.
...
Literal suffix for byte in .NET?
...re a byte variable in a short way like floats or doubles? I mean like 5f and 5d . Sure I could write byte x = 5 , but that's a bit inconsequential if you use var for local variables.
...
querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
... would like to know what exactly is the difference between querySelector and querySelectorAll against getElementsByClassName and getElementById ?
...
Images can't contain alpha channels or transparencies
...jpg OR update your png (photoshop or whatever you using to create the png) and delete the transparency areas. if you work with shadows, use jpg, that will do no headaches.
share
|
improve this answe...
Java: Why is the Date constructor deprecated, and what do I use instead?
...
The specific Date constructor is deprecated, and Calendar should be used instead.
The JavaDoc for Date describes which constructors are deprecated and how to replace them using a Calendar.
shar...
Pros and Cons of Interface constants [closed]
...
Well, I think that it boils down to the difference between good and good enough.
While in most cases you can avoid the use of constants by implementing other patterns (strategy or perhaps flyweight), there is something to be said for not needing a half dozen other classes to represent ...
What are the differences and similarities between ffmpeg, libav, and avconv?
...
Confusing messages
These messages are rather misleading and understandably a source of confusion. Older Ubuntu versions used Libav which is a fork of the FFmpeg project. FFmpeg returned in Ubuntu 15.04 "Vivid Vervet".
The fork was basically a non-amicable result of conflicting pe...