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How do you effectively model inheritance in a database?
... to confusion. "TPT" is supertype-subtype. "TPH" is Unnormalised, a gross error. "TPH" is even less Normalised, another gross error.
– PerformanceDBA
Nov 10 '10 at 21:33
45
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No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '…' is therefor
...
Why the error is raised:
JavaScript code is limited by the same-origin policy, meaning, from a page at www.example.com, you can only make (AJAX) requests to services located at exactly the same domain, in that case, exactly www.examp...
In AngularJS, what's the difference between ng-pristine and ng-dirty?
...il.$pristine">
Email is virgine.
</div>
<div class="error" ng-show="myForm.email.$dirty">
E-mail is dirty
</div>
</form>
A field that has registred a single keydown event is no more virgin (no more pristine) and is therefore dirty for ever.
...
Create, read, and erase cookies with jQuery [duplicate]
... //= require jQuery, as the installation instructions say to do), I get an error whenever I load the app about missing files. If I remember correctly, the error was something like "Sprockets::FileNotFound" (or something close to that, I'm not at my dev computer right now). Thanks!
...
Origin is not allowed by Access-Control-Allow-Origin
... so am I the only one getting app.configure() is not a function error?
– Pramesh Bajracharya
Nov 22 '17 at 9:40
...
Found conflicts between different versions of the same dependent assembly that could not be resolved
... output window reports that the build succeeded. However, when I view the Error List Window , it shows me this warning:
22...
Maximum size of a element
...
I've ran into out of memory errors on Firefox with canvas heights greater than 8000, chrome seems to handle much higher, at least to 32000.
EDIT: After running some more tests, I've found some very strange errors with Firefox 16.0.2.
First, I seem to...
Changing default encoding of Python?
... an application, check whether it is set right and abort with a meaningful error message).
– ibotty
Aug 9 '15 at 19:33
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How do I send a cross-domain POST request via JavaScript?
... textStatus, jqXHR) {
var value = responseData.someKey;
},
error: function (responseData, textStatus, errorThrown) {
alert('POST failed.');
}
});
When you do the POST in step 2, your browser will send a "OPTIONS" method to the server. This is a "sniff" by the browser ...
What does rake db:test:prepare actually do?
...epare is a good solution for PG issues like this.
“PG::UndefinedTable: ERROR: relation does not exist” with a correct Rails naming and convention" where I couldn't just execute rake db:migrate RAILS_ENV=production
When, for example you can't create test database for a bug discussed here: "PG ...