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Rails: Adding an index after adding column
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rails generate migration AddUserRefToProducts user:references
This command will generate the following migration:
class AddUserRefToProducts < ActiveRecord::Migration
def change
add_reference :user, :product, index: true
end
end
After running rake db:migrate both a user_id column a...
Case-Insensitive List Search
...in the list. Therefore, I need to do a case-insensitive search of the list and make it efficient. I can't use Contains because that doesn't take into account the casing. I also don't want to use ToUpper/ToLower for performance reasons. I came across this method, which works:
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Core Data: Quickest way to delete all instances of an entity
...he full object model for, let's say, "Cars" - could be about 2000 of them (and I can't make the Web Service return anything less than 1 or ALL cars.
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How to plot two columns of a pandas data frame using points?
I have a pandas data frame and would like to plot values from one column versus the values from another column. Fortunately, there is plot method associated with the data-frames that seems to do what I need:
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How do I revert to a previous package in Anaconda?
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I had to use the install function instead:
conda install pandas=0.13.1
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How to index characters in a Golang string?
... Specification section on Conversions.
The Go Blog: Strings, bytes, runes and characters in Go
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How can I check the system version of Android?
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Check android.os.Build.VERSION.
CODENAME: The current development codename, or the string "REL" if this is a release build.
INCREMENTAL: The internal value used by the underlying source control to represent this build.
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Converting Dictionary to List? [duplicate]
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Your problem is that you have key and value in quotes making them strings, i.e. you're setting aKey to contain the string "key" and not the value of the variable key. Also, you're not clearing out the temp list, so you're adding to it each time, instead of j...
How can I inject a property value into a Spring Bean which was configured using annotations?
...enerator(KeyGenerator kg) { ... }
systemProperties is an implicit object and strategyBean is a bean name.
One more example, which works when you want to grab a property from a Properties object. It also shows that you can apply @Value to fields:
@Value("#{myProperties['github.oauth.clientId']}")...
The name 'ConfigurationManager' does not exist in the current context
...The code is ASP.NET + C#. I have added System.Configuration to reference and also mentioned with using. But still it wouldn't accept the assembly.
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