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Removing a model in rails (reverse of “rails g model Title…”)
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It removes all, but it do not create downgrade migration or something.
– mr.The
Feb 12 '14 at 18:10
add a comme...
How to check for Is not Null And Is not Empty string in SQL server?
...with NULL or an empty string or a string consisting entirely of spaces are all excluded by this query.
SQL Fiddle
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How to prevent errno 32 broken pipe?
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Your server process has received a SIGPIPE writing to a socket. This usually happens when you write to a socket fully closed on the other (client) side. This might be happening when a client program doesn't wait till all the data from the server is received and simply closes a socket (using close...
How can I create a keystore?
...stribution and can be located at %JAVA_HOME%\bin. On Windows this would usually be C:\Program Files\Java\jre7\bin.
So on Windows, open a command window and switch to that directory and enter a command like this
keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysi...
Best practice to return errors in ASP.NET Web API
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For me I usually send back an HttpResponseException and set the status code accordingly depending on the exception thrown and if the exception is fatal or not will determine whether I send back the HttpResponseException immediately.
At ...
Using python “with” statement with try-except block
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in case opening the file fails you
will get a second exception in the
finally clause because f is not
bound.
The equivalent old style code would be:
try:
f = open("file", "r")
try:
line = f.readline()
finally:
f.close()
except IOError:
<whatever>
As you c...
UITableView + Add content offset at top
...t similarly to above by making custom views for the section headers, especially if you just have one section, this could give you the look of a permanent offset.
I can post sample code if it sounds like either of those are what you are looking for.
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Is List a subclass of List? Why are Java generics not implicitly polymorphic?
...l> - you can add any animal to it... including a cat. Now, can you logically add a cat to a litter of puppies? Absolutely not.
// Illegal code - because otherwise life would be Bad
List<Dog> dogs = new ArrayList<Dog>(); // ArrayList implements List
List<Animal> animals = dogs; ...
How do you clone a BufferedImage
...which has many bufferedimages in it, I want to create a new object copying all the bufferedimages into the new object, but these new images may be altered and i don't want the original object images to be altered by altering the new objects images.
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Remove scroll bar track from ScrollView in Android
...ch I want to use the entire width of the screen and be able to make (vertically) scrollable. So I've wrapped the WebView in a ScrollView in my layout XML, but no matter what I do I can't seem to be able to remove the scroll bar track from the right side of the scroll view. Even worse, I can't seem t...