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Deleting DataFrame row in Pandas based on column value
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If I'm understanding correctly, it should be as simple as:
df = df[df.line_race != 0]
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What is App.config in C#.NET? How to use it?
...onfig is an XML file with many predefined configuration sections available and support for custom configuration sections. A "configuration section" is a snippet of XML with a schema meant to store some type of information.
Overview (MSDN)
Connection String Configuration (MSDN)
Settings can be co...
Google Authenticator available as a public service?
...ented algorithm (noted in the RFC listed on the open source project page), and the authenticator implementations support multiple accounts.
The actual process is straightforward. The one time code is, essentially, a pseudo random number generator. A random number generator is a formula that once gi...
How to use if statements in underscore.js templates?
I'm using the underscore.js templating function and have done a template like this:
8 Answers
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Can't start Eclipse - Java was started but returned exit code=13
I am trying to get my first taste of Android development using Eclipse. I ran into this problem when trying to run Eclipse, having installed version 4.2 only minutes ago.
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How do I efficiently iterate over each entry in a Java Map?
If I have an object implementing the Map interface in Java and I wish to iterate over every pair contained within it, what is the most efficient way of going through the map?
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insert a NOT NULL column to an existing table
...Null-able column, then update your table column with valid not null values and finally ALTER column to set NOT NULL constraint:
ALTER TABLE MY_TABLE ADD STAGE INT NULL
GO
UPDATE MY_TABLE SET <a valid not null values for your column>
GO
ALTER TABLE MY_TABLE ALTER COLUMN STAGE INT NOT NULL
GO
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How to link C++ program with Boost using CMake
...his code helps.
Here's the official documentation about FindBoost.cmake.
And the actual FindBoost.cmake (hosted on GitHub)
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Extract numbers from a string
I want to extract the numbers from a string that contains numbers and letters like:
20 Answers
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Tetris-ing an array
...n any order to reduce them to their common prefix. Since it is associative and commutative the order doesn't matter for the result.
This is the same as for other binary operations like for example addition or greatest common divisor.
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