大约有 15,000 项符合查询结果（耗时：0.0197秒） [XML]
SQL Server dynamic PIVOT query?
...rchar(3),
amount money
)
insert into temp values ('1/1/2012', 'ABC', 1000.00)
insert into temp values ('2/1/2012', 'DEF', 500.00)
insert into temp values ('2/1/2012', 'GHI', 800.00)
insert into temp values ('2/10/2012', 'DEF', 700.00)
insert into temp values ('3/1/2012', 'ABC', 1100.00)
DECLA...
Spring RestTemplate timeout
...tpRequestFactory) restTemplate.getRequestFactory();
rf.setReadTimeout(1 * 1000);
rf.setConnectTimeout(1 * 1000);
The first time this code is called it will set the timeout for the HttpComponentsClientHttpRequestFactory class used by the RestTemplate. Therefore, all subsequent calls made by RestTem...
Setting an object to null vs Dispose()
...('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f574019%2fsetting-an-object-to-null-vs-dispose%23new-answer', 'question_page');
}
);
Post as a guest
...
What is the maximum possible length of a query string?
...5.x. However, longer URLs will work. No further testing was done after 100,000 characters.
Safari (Browser)
At least 80,000 characters will work. Testing was not tried beyond that.
Opera (Browser)
At least 190,000 characters will work. Stopped testing after 190,000 characters. Opera 9 for Windows co...
Max length for client ip address [duplicate]
...ly written as 8 groups of 4 hex digits separated by colons: 2001:0db8:85a3:0000:0000:8a2e:0370:7334. 39 characters is appropriate to store IPv6 addresses in this format.
Edit: However, there is a caveat, see @Deepak's answer for details about IPv4-mapped IPv6 addresses. (The correct maximum IPv6 s...
Using sed to mass rename files
...ge p5-file-rename), or other systems with perl rename (prename):
rename s/0000/000/ F0000*
or on systems with rename from util-linux-ng, such as RHEL:
rename 0000 000 F0000*
That's a lot more understandable than the equivalent sed command.
But as for understanding the sed command, the sed man...
Java String - See if a string contains only numbers and not letters
...c class StringIsNumberBenchmark {
private static final long CYCLES = 1_000_000L;
private static final String[] STRINGS = {"12345678901","98765432177","58745896328","35741596328", "123456789a1", "1a345678901", "1234567890 "};
private static final Pattern PATTERN = Pattern.compile("\\d+");...
What is the use for Task.FromResult in C#
...saving time by not having the thread switch.
– Brain2000
Aug 15 '18 at 17:53
...
How to get the number of Characters in a String?
...runeslice/ASCII 27.8ns ± 2% 14.5ns ± 3% -47.70% (p=0.000 n=10+10)
RuneCount/lenruneslice/Japanese 126ns ± 2% 60ns ± 2% -52.03% (p=0.000 n=10+10)
RuneCount/lenruneslice/MixedLength 104ns ± 2% 50ns ± 1% -51.71% (p=0.000 n=10+9)
Stefan St...
Timer function to provide time in nano seconds using C++
...unsigned long long rep;
typedef std::ratio<1, 2'800'000'000> period; // My machine is 2.8 GHz
typedef std::chrono::duration<rep, period> duration;
typedef std::chrono::time_point<clock> time_point;
static const bool is_steady = ...