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What is the meaning of id?
...ype to id, as well as send it any message (that the compiler has seen) without warning.
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What is the PostgreSQL equivalent for ISNULL()
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It is worth pointing out that ISNULL and COALESCE are not the same. IsNull forces the result-type to the type of argument1, while coalesce uses the respective types for each argument. If you just search-and-replace isnull with coalesce, you can p...
Difference between “read commited” and “repeatable read”
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Why would the second session1 still read out Aaron? Isn't session2's transaction finished and commited? I know this old, but maybe someone can shed some light.
– Sonny Childs
May 20 '15 at 12:27
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How to convert URL parameters to a JavaScript object?
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Also does not work when you have one of parameters without value.
– Sych
Jun 23 '16 at 15:20
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Get time difference between two dates in seconds
...etTime()) / 1000;
Or even simpler (endDate - startDate) / 1000 as pointed out in the comments unless you're using typescript.
The explanation
You need to call the getTime() method for the Date objects, and then simply subtract them and divide by 1000 (since it's originally in milliseconds). As an ...
What is the proper #include for the function 'sleep()'?
I am using the Big Nerd Ranch book Objective-C Programming, and it starts out by having us write in C in the first few chapters. In one of my programs it has me create, I use the sleep function. In the book it told me to put #include <stdlib.h> under the #include <stdio.h> part. This...
Advantages of using display:inline-block vs float:left in CSS
...ility.
Float
The reason that using the float method is not suited for layout of your page is because the float CSS property was originally intended only to have text wrap around an image (magazine style) and is, by design, not best suited for general page layout purposes. When changing floated ele...
How does functools partial do what it does?
... 8.602
Or for instance, one of the function's arguments changes in an outer loop but is fixed during iteration in the inner loop. By using a partial, you don't have to pass in the additional parameter during iteration of the inner loop, because the modified (partial) function doesn't require it...
@RequestParam in Spring MVC handling optional parameters
...d request parameters as well. That's because, when you provide just the logout parameter, it actually expects for name and password as well as they are still mandatory.
It worked when you just gave name and password because logout wasn't a mandatory parameter thanks to required = false already give...
Redirect STDERR / STDOUT of a process AFTER it's been started, using command line?
In the shell you can do redirection, > < , etc., but how about AFTER a program is started?
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