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What does the exclamation mark do before the function?
...ation. You would need an invocation, foo(), to actually run the function.
Now, when we add the seemingly innocuous exclamation mark: !function foo() {} it turns it into an expression. It is now a function expression.
The ! alone doesn't invoke the function, of course, but we can now put () at the ...
Does Foreign Key improve query performance?
...pretty much useless because it doesn't answer the question. It's great to know that foreign keys are not intended to have a (positive) effect on performance, but the question was concerning reality, not intentions.
– John
Mar 15 '17 at 16:04
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How to install the current version of Go in Ubuntu Precise
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This is annoying now that you have to bootstrap 1.5+ with a 1.4+ build.
– jocull
Jan 2 '16 at 17:17
add a comment
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scipy.misc module has no attribute imread?
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It should be Pillow instead of PIL now. Reference: pillow.readthedocs.org
– Yuchen Zhong
Nov 23 '14 at 23:45
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file_put_contents - failed to open stream: Permission denied
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There is now a troubleshooting checklist for this kind of problems : stackoverflow.com/questions/36577020/…
– Vic Seedoubleyew
Aug 20 '16 at 9:26
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Force CloudFront distribution/file update
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As of March 19, Amazon now allows Cloudfront's cache TTL to be 0 seconds, thus you (theoretically) should never see stale objects. So if you have your assets in S3, you could simply go to AWS Web Panel => S3 => Edit Properties => Metadata,...
Example for boost shared_mutex (multiple reads/one write)?
... has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updating thread could wait for the o...
How do I get the day of the week with Foundation?
...ter alloc] init] ;
[dateFormatter setDateFormat:@"EEEE"];
NSDate *now = [[NSDate alloc] init];
NSString *dateString = [format stringFromDate:now];
NSString *theDate = [dateFormat stringFromDate:now];
NSString *theTime = [timeFormat stringFromDate:now];
NSString *week = [dat...
Sublime Text from Command Line
I installed Sublime Text and wanted to know how to open rb files in it from the terminal. I saw What is the command to make Sublime Text my core editor? and I see that I can make Sublime my core editor, but I want to be able to type
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PHP “php://input” vs $_POST
...1.1
{"key1":"value1","key2":"value2","key3":"value3"}
The content would now be application/json (or at least none of the above mentioned), so PHP's $_POST-wrapper doesn't know how to handle that (yet).
The data is still there, you just can't access it through the wrapper. So you need to fetch i...