大约有 20,000 项符合查询结果（耗时：0.0313秒） [XML]
php is null or empty?
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Tested and correct. ''==null (true) while ''===null(false)
– TheLegendaryCopyCoder
Jun 16 '18 at 13:52
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How do you redirect HTTPS to HTTP?
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This has not been tested but I think this should work using mod_rewrite
RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI}
s...
Explicit vs implicit SQL joins
...g of the deprecated *= and =* operators vs. "outer join".
I have just now tested the two formats given, and they work properly on a SQL Server 2008 database. In my case they yielded identical execution plans, but I couldn't confidently say that this would always be true.
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Get attribute name value of
...300k operations / second
JavaScript: 11,000k operations / second
You can test for yourself here. The "plain JavaScript" vesion is over 35 times faster than the jQuery version.
Now, that's just for one operation, over time you will have more and more stuff going on in your code. Perhaps for someth...
Integer to hex string in C++
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@MSalters - quite on the contrary. Test your suggestion on the int type ;)
– Kornel Kisielewicz
Feb 24 '11 at 10:13
2
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Remove DEFINER clause from MySQL Dumps
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(after some tests: -1) It uses information_schema.user, and this isn't always readable for all users
– bato3
Dec 7 '18 at 1:28
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How can I change the image displayed in a UIImageView programmatically?
... things are in separate NIBs) this is important to keep in mind.
So if my test view controller has an "imageView" wired by a nib, this probably won't work:
testCardViewController.imageView.image = [UIImage imageNamed:@"EmptyCard.png"];
[self.view addSubview:testCardViewController.view];
But ...
jQuery disable a link
...rtain condition is fulfilled (something is hidden for instance), you could test the visibility of your ul with the class expanded. If it is visible (i.e. not hidden) the link should fire as normal, as the if statement will not be entered, and thus the default behaviour will not be prevented:
$('ul ...
log4j configuration via JVM argument(s)?
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For Logback: -Dlogback.configurationFile=C:\logback-test.xml
– 30thh
Nov 7 '13 at 13:00
2
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Does free(ptr) where ptr is NULL corrupt memory?
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@WereWolfBoy he means avoid free(NULL) by testing the pointer against NULL before calling free()
– Gregory Pakosz
Apr 25 '13 at 13:32
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