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Change column type from string to float in Pandas

I want to convert a table, represented as a list of lists, into a Pandas DataFrame . As an extremely simplified example: 9...
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What is a NullPointerException, and how do I fix it?

What are Null Pointer Exceptions ( java.lang.NullPointerException ) and what causes them? 12 Answers ...
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Logical operators for boolean indexing in Pandas

I'm working with boolean index in Pandas. The question is why the statement: 3 Answers ...
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Javascript reduce on array of objects

Say I want to sum a.x for each element in arr . 15 Answers 15 ...
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html - table row like a link

I can't set my table row as link to something. I can use only css and html. I tried different things from div in row to something another, but still can't make it works. ...
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Test if a variable is a list or tuple

In python, what's the best way to test if a variable contains a list or a tuple? (ie. a collection) 13 Answers ...
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Is a one column table good design? [closed]

It it ok to have a table with just one column? I know it isn't technically illegal, but is it considered poor design? 15 A...
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Logging best practices [closed]

I'd like to get stories on how people are handling tracing and logging in real applications. Here are some questions that might help to explain your answer. ...
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Choose between ExecutorService's submit and ExecutorService's execute

...choose between ExecutorService's submit or execute , if the returned value is not my concern? 7 Answers ...
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How can I create a link to a local file on a locally-run web page?

I'd like to have an html file that organizes certain files scattered throughout my hard drive. For example, I have two files that I would link to: ...