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Sequence contains no matching element
...row an exception if it can't find any matching elements. Given that you're testing for null immediately afterwards, it sounds like you want FirstOrDefault(), which returns the default value for the element type (which is null for reference types) if no matching items are found:
var documentRow = _d...
How to minify php page html output?
...l comments and other pitfalls. I'd recommend taking advantage of the well-tested Minify project rather than creating your own regex from scratch.
In my case I place the following code at the top of a PHP page to minify it:
function sanitize_output($buffer) {
require_once('min/lib/Minify/HTML....
Select 50 items from list at random to write to file
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I used this to easily create a test / train set for a machine learning project. Using random.choice(mylist,3) wouldn't create two disjoint sets as this did.
– Monica Heddneck
Jul 31 '17 at 23:38
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mysqli_fetch_assoc() expects parameter / Call to a member function bind_param() errors. How to get t
...s on the environment - so just leave it for PHP.
Do not add a condition to test the query result manually (like if($result)). With error exceptions enabled such condition will just be useless.
Do not use try..catch operator for echoing the error message. This operator should be used to perform some...
Practical non-image based CAPTCHA approaches?
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I think it's better to start with easy-to-bypass tests to see if they are adequate.
– pbreitenbach
Jul 6 '09 at 14:07
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What HTTP status response code should I use if the request is missing a required parameter?
...there's a set standard, but I would have used 400 Bad Request, which the latest HTTP spec (from 2014) documents as follows:
6.5.1. 400 Bad Request
The 400 (Bad Request) status code indicates that the server cannot or
will not process the request due to something that is perceived to b...
relative path in BAT script
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Ok, that's a point. I've only tested this on two different Windows 7 machines, might be different elsewhere (XP, Vista oder Windwos 8 --> I don't know but: Microsoft logic and I couldn't find any docs about it ;)). However, I found that I had to put qu...
What is the PostgreSQL equivalent for ISNULL()
...e will take a large number of arguments. There is no documented maximum. I tested it will 100 arguments and it succeeded. This should be plenty for the vast majority of situations.
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Difference between “read commited” and “repeatable read”
...No, Phantom reads from deletes cannot occur in repeatable read isolation. Test it. What I am saying is not contradicted by the documentation you have quoted.
– AndyBrown
Sep 19 '14 at 15:00
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Advantages of using display:inline-block vs float:left in CSS
...xpected alignment behavior. Look at this article.
http://www.brunildo.org/test/inline-block.html
Instead, when you do a float:left, the divs are independent of each other and you can align them using margin easily.
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