大约有 15,467 项符合查询结果（耗时：0.0242秒） [XML]
Return Boolean Value on SQL Select Statement
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Doing the Exists( test is much faster than doing a Count(1) test on tables with large numbers of rows.
– Scott Chamberlain
Apr 3 '14 at 2:06
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How to inspect the return value of a function in GDB?
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(gdb) r
Starting program: /usr/home/hark/a.out
Breakpoint 1, fun () at test.c:2
2 return 42;
(gdb) finish
Run till exit from #0 fun () at test.c:2
main () at test.c:7
7 return 0;
Value returned is $1 = 42
(gdb)
The finish command can be abbreviated as fin. Do NOT ...
How does Stack Overflow generate its SEO-friendly URLs?
...d to "ss" sb.Length == maxlene will never be true, it is better instead to test for (sb.Length > = maxlen).
– Henrik Stenbæk
Mar 29 '12 at 13:14
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PDO Prepared Inserts multiple rows in single query
...n $e){
echo $e->getMessage();
}
$pdo->commit();
Although in my test, there was only a 1 sec difference when using multiple inserts and regular prepared inserts with single value.
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What's the pythonic way to use getters and setters?
...fer to self._protected_value. Could you please explain how this works? I tested your code and it works as is - so this is not a typo.
– codeforester
Jul 28 '18 at 0:36
2
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Using current time in UTC as default value in PostgreSQL
...ust put parentheses around the default expression:
create temporary table test(
id int,
ts timestamp without time zone default (now() at time zone 'utc')
);
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Python function global variables?
...l.append(0) # l is still the same list but has an additional member
o.test = 1 # creating new attribute on o, but o is still the same object
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How to use support FileProvider for sharing content to other apps?
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Can you please provide a working code for the latest solution @Lecho?
– StErMi
Mar 31 '14 at 7:45
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querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
...ttps://jsperf.com/getelementsbyclassname-vs-queryselectorall/18
It runs a test on the 2 x examples above, plus it chucks in a test for jQuery's equivalent selector as well. my test results were as follows:
getElementsByClassName = 1,138,018 operations / sec - <<< clear winner
querySelecto...
Why does C# not provide the C++ style 'friend' keyword? [closed]
...rest of the application. I use the "friend" assembly tricks to create unit test assemblies for these objects.
– Quibblesome
Oct 23 '09 at 13:11
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