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ActiveRecord, has_many :through, and Polymorphic Associations
...on't work together. If you try to access them directly, it should throw an error.
If i am not mistaken, you have to hand write widget.people and the push routine.
I don't think it is a bug, it is just something which hasn't been implemented yet. I would imagine we see it in the feature, because eve...
Calculating the difference between two Java date instances
... This actually does not work correctly in Android. Rounding errors exist. Example 19th to 21st May says 1 day because it casts 1.99 to 1. Use round before casting to int.
– Pratik Mandrekar
May 1 '13 at 14:51
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Return value in a Bash function
... an exit code of 0 is considered success and therefore "true". Non-zero is error and therefore false. Think of fun1 || fun2 as shorthand for "if fun1 returns success or fun2 returns success" rather than an operator on the actual return values themselves.
– davidA
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Do you use NULL or 0 (zero) for pointers in C++?
...if you use NULL, in a plain code without complex header, you will find the error of "NULL is not defined in this scope"..
– ArtificiallyIntelligence
Nov 12 '17 at 23:07
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Can two applications listen to the same port?
...ort already. This enables you to get around those "Address already in use" error messages when you try to restart your server after a crash.
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How to run a shell script in OS X by double-clicking?
... you'll see the following symptoms:
.command: Finder displays a misleading error message that suggests the problem can be fixed via File > Get Info, which is not true - use the chmod +x method suggested above.
no suffix:
with a shebang line (e.g., #!/bin/bash): behavior is as if the suffix wer...
SQL Add foreign key to existing column
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Error indicates that there is no UserID column in your Employees table. Try adding the column first and then re-run the statement.
ALTER TABLE Employees
ADD CONSTRAINT FK_ActiveDirectories_UserID FOREIGN KEY (UserID)
REF...
Storing C++ template function definitions in a .CPP file
...from its declaration and put it inside a .cpp file?
How can I avoid linker errors with my template functions?
How does the C++ keyword export help with template linker errors?
They go into a lot of detail about these (and other) template issues.
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Multiple HttpPost method in Web API controller
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If I add like this it gives me an error ------------ namespace ImageDownloadApplication.Controllers { public class FrontModel { public string skus { get; set; } } [ActionName("ProductController")] public class ProductController ...
Hibernate: hbm2ddl.auto=update in production?
... DBAs on staff. It's just one less manual process that's subject to human error - the application can detect the difference and do the right thing, plus you've presumably tested it in various development and test environments.
One caveat - in a clustered environment you may want to avoid it becau...