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Is returning by rvalue reference more efficient?
...e following
Beta_ab
Beta::toAB() const {
return Beta_ab(1, 1);
}
Now, it's properly moving a temporary Beta_ab object into the return value of the function. If the compiler can, it will avoid the move altogether, by using RVO (return value optimization). Now, you can do the following
Beta...
Storing JSON in database vs. having a new column for each key
...a types and the support in PostgreSQL was in its infancy. Since 5.7, MySQL now supports a JSON data type (in a binary storage format), and PostgreSQL JSONB has matured significantly. Both products provide performant JSON types that can store arbitrary documents, including support for indexing specif...
Adding VirtualHost fails: Access Forbidden Error 403 (XAMPP) (Windows 7)
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Okay: This is what I did now and it's solved:
My httpd-vhosts.conf looks like this now:
<VirtualHost dropbox.local:80>
DocumentRoot "E:/Documenten/Dropbox/Dropbox/dummy-htdocs"
ServerName dropbox.local
ErrorLog "logs/dropbox.local...
Check if checkbox is checked with jQuery
...type="checkbox" name="chk[]" value="Bananas" />
</fieldset>
And now the jQuery:
var atLeastOneIsChecked = $('#checkArray:checkbox:checked').length > 0;
//there should be no space between identifier and selector
// or, without the container:
var atLeastOneIsChecked = $('input[name="c...
Docker and securing passwords
...t of docker inspect is probably pretty low on your list of things that can now go wrong. This particular detail seems like acceptable risk to me.
– GrandOpener
Jun 1 '17 at 17:42
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error: ‘NULL’ was not declared in this scope
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Now that C++11 is more generally supported by compilers, it might be worth mentioning the nullptr keyword, which is an actual keyword and doesn't require any #includes. It's also more typesafe than NULL.
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What does the Java assert keyword do, and when should it be used?
...perfect. The main reason for this are pointers: they can point anywhere or nowhere, therefore they cannot be calculated to be of this exact value, at least not within a reasonable span of code. Given this problem, there is no way to prove that your code is correct at a whole. But what you can do is ...
how to get request path with express req object
...'s off of the root. That's nice for isolation, but tricky when you don't know how to get what the original full value was. Thanks for posting this!
– juanpaco
Apr 23 '15 at 12:31
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How to convert an NSString into an NSNumber
...g. int , float , char , unsigned int , etc.)? The problem is, I don't know which number type the string will contain at runtime.
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On delete cascade with doctrine2
...also want to point out that the way you have your cascade={"remove"} right now, if you delete a Child object, this cascade will remove the Parent object. Clearly not what you want.
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