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Declaring a default constraint when creating a table
... square brackets rather than quotes as many readers won't work with QUOTED_IDENTIFIERS on by default.
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Converting from Integer, to BigInteger
...eger the intValue() will not overflow, so the call to valueOf will simply widen the int to a long. There's no noticeable difference between using longValue() and intValue() in this example, but if he started with a Long, he would want to use longValue().
– jbindel
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difference between primary key and unique key
...S it cannot be NULL - e.g. MySQL adds NOT NULL
Primary Key is a unique key identifier of the record
Unique Key:
Can be more than one unique key in one table
Unique key can have NULL values
It can be a candidate key
Unique key can be NULL ; multiple rows can have NULL values and therefore may not...
How to copy files between two nodes using ansible
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good answer! Unfortunately I did not get it working in an Vagrant environment with multi VMs. Seems Vagrant does something special there.
– therealmarv
Mar 5 '15 at 6:56
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How can I detect when an Android application is running in the emulator?
...lopment server automatically.) What is the best way to detect when an Android application is running in the emulator?
36 An...
What is the correct syntax of ng-include?
I’m trying to include an HTML snippet inside of an ng-repeat , but I can’t get the include to work. It seems the current syntax of ng-include is different than what it was previously: I see many examples using
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How do I test a file upload in rails?
...le.new(Rails.root.join("test/fixtures/files/test.jpg"))
})
assert model.valid?
This way you can use the same methods you are using in your validations (as for example tempfile).
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Why use @Scripts.Render(“~/bundles/jquery”)
...ery-ui-1.8.16.min.js",
"~/Resources/Core/Javascripts/jquery.validate.min.js",
"~/Resources/Core/Javascripts/jquery.validate.unobtrusive.min.js",
"~/Resources/Core/Javascripts/jquery.unobtrusive-ajax.min.js",
"~/Resources/Core/Javascripts/jquery-ui-time...
How to determine why visual studio might be skipping projects when building a solution
...be removed) and re-adding them to the solution.
– Hamid Mayeli
May 20 '19 at 14:33
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Why is this program valid? I was trying to create a syntax error
...gt;Syntax(! exit 0);
or
error->Syntax(!exit(0));
Not only is it valid syntax, it doesn't result in a run-time error because the first thing executed is exit(0).
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