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SQL Server: What is the difference between CROSS JOIN and FULL OUTER JOIN?
What is the difference between CROSS JOIN and FULL OUTER JOIN in SQL Server?
10 Answers
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Retrieve list of tasks in a queue in Celery
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When specifying the worker I had to use a list as argument: inspect(['celery@Flatty']). Huge speed improvement over inspect().
– Adversus
Dec 14 '15 at 12:46
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Is it safe to remove selected keys from map within a range loop?
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Sebastian's answer is accurate, but I wanted to know why it was safe, so I did some digging into the Map source code. It looks like on a call to delete(k, v), it basically just sets a flag (as well as changing the count value) instead of actually deleting the value:
b->...
Handler vs AsyncTask vs Thread [closed]
... and AsyncTask. These classes do most of the work for us, we only need to know which methods to override.
The difference between Handler and AsyncTask is: Use AsyncTask when Caller thread is a UI Thread.
This is what android document says:
AsyncTask enables proper and easy use of the UI thread....
How do I get the localhost name in PowerShell?
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Note: if your DNS name is longer than 15 characters, [System.Net.Dns]::GetHostName() (doesn't truncate) is better than $env:COMPUTERNAME (truncates)
– sonjz
Jul 19 '16 at 23:42
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NSDictionary - Need to check whether dictionary contains key-value pair or not
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Just ask it for the objectForKey:@"b". If it returns nil, no object is set at that key.
if ([xyz objectForKey:@"b"]) {
NSLog(@"There's an object set for key @\"b\"!");
} else {
NSLog(@"No object set for key @\"b\"");
}
Edit: As to your edited second que...
Test if object implements interface
... operator does the work in a NullPointerException safe way. For example:
if ("" instanceof java.io.Serializable) {
// it's true
}
yields true. Since:
if (null instanceof AnyType) {
// never reached
}
yields false, the instanceof operator is null safe (the code you posted isn't). ...
Using curl POST with variables defined in bash script functions
...:xxxxx@xxxx-www.xxxxx.com/xxxxx/xxxx/xxxx"
This said, here are a few clarifications about shell quoting rules:
The double quotes in the -H arguments (as in -H "foo bar") tell bash to keep what's inside as a single argument (even if it contains spaces).
The single quotes in the --data argument (a...
Downloading a file from spring controllers
...his output stream as a place to put generated PDF to your generator. Also, if you know what file type you are sending, you can set
response.setContentType("application/pdf");
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Fixing JavaScript Array functions in Internet Explorer (indexOf, forEach, etc.) [closed]
... to put this in writing. The wiki as a whole is CC Attribution-ShareAlike, if that's an acceptable licence (though CC isn't designed for code as such).
js-methods looks OK in general, but is not as standards-compliant around the edges of how the functions are supposed to be (eg. undefined list item...