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Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
...this question's original title "How to delete rows from a pandas DataFrame based on a conditional expression" (which I understand is not necessarily the OP's problem but could help other users coming across this question) one way to do this is to use the drop method:
df = df.drop(some labels)
df =...
What does inverse_of do? What SQL does it generate?
... through a relationship.
Their example:
class Dungeon < ActiveRecord::Base
has_many :traps, :inverse_of => :dungeon
has_one :evil_wizard, :inverse_of => :dungeon
end
class Trap < ActiveRecord::Base
belongs_to :dungeon, :inverse_of => :traps
end
class EvilWizard < ActiveRe...
Why would one use REST instead of SOAP based services? [closed]
...) why REST is in anyway better or simpler to use and implement than a SOAP based Services stack.
11 Answers
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Describe the architecture you use for Java web applications? [closed]
Let's share Java based web application architectures!
10 Answers
10
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Unit testing code with a file system dependency
...ing a bit more interesting going on with a file and you wanted to save the Base64 encoded contents of a byte[] to a file. You can use streams for this to test that your code does the right thing without having to check how it does it. One example might be something like this (in Java):
interface St...
How do you effectively model inheritance in a database?
What are the best practices for modeling inheritance in databases?
9 Answers
9
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split string in to 2 based on last occurrence of a separator
...here is any built in function in python to break the string in to 2 parts, based on the last occurrence of a separator.
3 A...
GitHub pull request showing commits that are already in target branch
...force it to update by clicking Edit on the PR and temporarily changing the base to a different branch and back again. This produces the warning:
Are you sure you want to change the base?
Some commits from the old base branch may be removed from the
timeline, and old review comments may be...
Is the 'override' keyword just a check for a overridden virtual method?
...tion being implemented is the override ing of a virtual function in the base class.
5 Answers
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Index (zero based) must be greater than or equal to zero
...t it is showing error "System.FormatException occurred Message=Index (zero based) must be greater than or equal to zero and less than the size of the argument list."
– parag
Sep 28 '17 at 14:04
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