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How to export table as CSV with headings on Postgresql?
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answered Dec 1 '16 at 17:32
BrianBrian
1,03911 gold badge77 silver badges66 bronze badges
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Rails “validates_uniqueness_of” Case Sensitivity
... 3rd Edition:
...despite its name, validates_uniqueness_of doesn’t really guarantee that column values will be unique. All it can do is verify that no column has the same value as that in the record being validated at the time the validation is performed. It’s possible for two records to be ...
How do I sort a vector of pairs based on the second element of the pair?
...response to your edits to your question, here's some thoughts ...
if you really wanna be creative and be able to reuse this concept a lot, just make a template:
template <class T1, class T2, class Pred = std::less<T2> >
struct sort_pair_second {
bool operator()(const std::pair<T1...
How do I use IValidatableObject?
... Prop1 = 1,
Prop2 = 2
};
bool validateAllProperties = false;
var results = new List<ValidationResult>();
bool isValid = Validator.TryValidateObject(
toValidate,
new ValidationContext(toValidate, null, null),
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How do you build a Singleton in Dart?
... There's the weird syntax Singleton._internal(); that looks like a method call when it's really a constructor definition. There's the _internal name. And there's the nifty language design point that Dart lets you start out (dart out?) using an ordinary constructor and then, if needed, change it to a...
MySQL check if a table exists without throwing an exception
...t; 0;
– Reactgular
Dec 27 '12 at 17:32
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mysqli : if ($db->query("SHOW TABLES LIKE 'myTable'")...
Minimizing NExpectation for a custom distribution in Mathematica
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As far as I see, the problem is (as you already wrote), that MeanResidualLife takes a long time to compute, even for a single evaluation. Now, the FindMinimum or similar functions try to find a minimum to the function. Finding a minimum requires either to set the first derivative of the function...
Are table names in MySQL case sensitive?
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This totally burned me as my code was working great on my local windows environment, but throwing exceptions when moved into production on linux!! Thanks!
– portforwardpodcast
Feb 14 '13 at 21:1...
How to use cURL to get jSON data and decode the data?
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I've updated the question with the small difficulty I am having working with the PHP array that is returned by jSON. Please read the bottom part of it if you can.
– Maaz
May 22 '13 at 21:30
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PHP function to get the subdomain of a URL
...hen dealing with co.uk, for example, it does not. As seen here This is actually a harder problem to solve.
– Mike Lewis
Mar 13 '11 at 23:12
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