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Not equal != operator on NULL
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The only test for NULL is IS NULL or IS NOT NULL. Testing for equality is nonsensical because by definition one doesn't know what the value is.
Here is a wikipedia article to read:
https://en.wikipedia.org/wiki/Null_(SQL)
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Disable double-tap “zoom” option in browser on touch devices
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Doesn't work on latest iOS when double tapping an image.
– Adam Silver
Aug 3 at 15:49
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WordPress asking for my FTP credentials to install plugins
...filesystem_method. Wordpress tries to create a file 'wp-content/temp-write-test-'.time(). If this fails it assumes that you can only use FTP. But this might not be true, if wp-content itself is not writable, but for example wp-content/plugins is. Then, forcing FS_METHOD works.
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What does multicore assembly language look like?
...xample with all required boilerplate. All major parts are covered below.
Tested on Ubuntu 15.10 QEMU 2.3.0 and Lenovo ThinkPad T400 real hardware guest.
The Intel Manual Volume 3 System Programming Guide - 325384-056US September 2015 covers SMP in chapters 8, 9 and 10.
Table 8-1. "Broadcast INIT...
Creating the Singleton design pattern in PHP5
...] = new static;
}
return self::$instances[$cls];
}
}
Test code:
class Foo extends Singleton {}
class Bar extends Singleton {}
echo get_class(Foo::getInstance()) . "\n";
echo get_class(Bar::getInstance()) . "\n";
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How to send a header using a HTTP request through a curl call?
... --header parameter. example: curl --header "Accept: javascript" --header "test: hello" -v www.google.com
– Hatoru Hansou
Sep 24 '15 at 6:41
2
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cartesian product in pandas
..._, left), (_, right) in rows)
return df.reset_index(drop=True)
Quick test:
In [46]: a = pd.DataFrame(np.random.rand(5, 3), columns=["a", "b", "c"])
In [47]: b = pd.DataFrame(np.random.rand(5, 3), columns=["d", "e", "f"])
In [48]: cartesian(a,b)
Out[48]:
a b c...
How to programmatically set style attribute in a view
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Button b = new Button(this);
b.setBackgroundResource(R.drawable.selector_test);
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Difference between maven scope compile and provided for JAR packaging
...vides those classes. This
scope is only available on the compilation and test classpath, and is
not transitive.
Recap:
dependencies are not transitive (as you mentioned)
provided scope is only available on the compilation and test classpath, whereas compile scope is available in all clas...
How serious is this new ASP.NET security vulnerability and how can I workaround it?
...the error I assume (and is almost certaint) it's an app error, but need to test this some myself. So having custom error pages would not show the padding error.
– Mikael Svenson
Sep 15 '10 at 19:55
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