大约有 2,253 项符合查询结果（耗时：0.0300秒） [XML]
How to convert timestamp to datetime in MySQL?
... seems clear to compare a unix time from a unix time. I use SELECT (CAST(DATE_FORMAT(from_unixtime(UNIX_TIMESTAMP(CURRENT_TIMESTAMP)), '%Y-%m-%d') as DATE) < CAST('2019-05-02' AS DATE)) ; to compare dates, I replace 2019-05*02 a formatted datetime object in php. Thnaks.
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Swift - How to convert String to Double
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For a little more Swift feeling, using NSFormatter() avoids casting to NSString, and returns nil when the string does not contain a Double value (e.g. "test" will not return 0.0).
let double = NSNumberFormatter().numberFromString(myString)?.doubleValue
Alternatively, extending Swif...
Handle Guzzle exception and get HTTP body
...bled across this in the docs: \GuzzleHttp\Psr7\str($e->getResponse()) Casting the response as a Psr7 String got me a nicely formatted and complete error message.
– Andy Place
Dec 20 '16 at 23:29
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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...
T-SQL split string
...IM(Split.a.value('.', 'VARCHAR(100)'))) 'Value'
FROM
(
SELECT CAST ('<M>' + REPLACE(@String, @Delimiter, '</M><M>') + '</M>' AS XML) AS Data
) AS A
CROSS APPLY Data.nodes ('/M') AS Split(a)
RESULT
x---------x
| Value |
x---------x
| String1 ...
Program only crashes as release build — how to debug?
...by a buffer overflow, caused a single byte difference:
char *end = static_cast<char*>(attr->data) + attr->dataSize;
This is a fencepost error (off-by-one error) and was fixed by:
char *end = static_cast<char*>(attr->data) + attr->dataSize - 1;
The weird thing was, I put...
hash function for string
...e_t m = 0x5bd1e995;
size_t hash = seed ^ len;
const char* buf = static_cast<const char*>(ptr);
// Mix 4 bytes at a time into the hash.
while (len >= 4)
{
size_t k = unaligned_load(buf);
k *= m;
k ^= k >> 24;
k *= m;
hash *= m;
hash ^= k;
buf += 4...
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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How can I determine whether a 2D Point is within a Polygon?
...hat can handle all three cases above and is still pretty fast is named ray casting. The idea of the algorithm is pretty simple: Draw a virtual ray from anywhere outside the polygon to your point and count how often it hits a side of the polygon. If the number of hits is even, it's outside of the pol...
Why can I pass 1 as a short, but not the int variable i?
...soft.com/en-us/library/ybs77ex4(v=vs.71).aspx
As this page says, implicit casts from a bigger data type to short are only allowed for literals. The compiler can tell when a literal is out of range, but not otherwise, so it needs reassurance that you've avoided an out-of-range error in your program ...