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What is the most effective way for float and double comparison?
...ed by the majority of programmers. Floating point is always about relative errors, since it is floating point (not fixed point). So it will never correctly work with a fixed error (epsilon).
– user2261015
Apr 13 '17 at 7:58
...
Applicatives compose, monads don't
...statement: list <*> pure True <*> pure "hello" <*> pure (error "bad")....I get "hello" and the error never occurs. This code isn't nearly as safe or controlled as a monad, but the post seems like it's suggesting that applicatives cause strict evaluation. Overall great post though! ...
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!
...
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.
...
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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Only parameterless constructors and initializers are supported in LINQ to Entities
I have this error in this linq expression :
14 Answers
14
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No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '…' is therefor
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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...
Strangest language feature
... id : 1234,
title : 'Tony the Pony'
};
returns undefined is a syntax error due to the sneaky implicit semicolon insertion on the newline after return. The following works as you would expect though:
return {
id : 1234,
title : 'Tony the Pony'
};
Even worse, this one works as well (i...
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...
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 ...