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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
I am working with the pandas library and I want to add two new columns to a dataframe df with n columns (n > 0).
These new columns result from the application of a function to one of the columns in the dataframe.
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How to read from stdin line by line in Node
I'm looking to process a text file with node using a command line call like:
6 Answers
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Creating JS object with Object.create(null)?
I know a lot of ways to create JS objects but I didn't know the Object.create(null) 's one.
5 Answers
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RegEx - Match Numbers of Variable Length
I'm trying to parse a document that has reference numbers littered throughout it.
5 Answers
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Why can't I center with margin: 0 auto?
I have a #header div that is 100% width and within that div I have an unordered list. I have applied margin: 0 auto to the unordered list but it won't center it within the header div.
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How to list out all the subviews in a uiviewcontroller in iOS?
I want to list out all the subviews in a UIViewController . I tried self.view.subviews , but not all of the subviews are listed out, for instance, the subviews in the UITableViewCell are not found. Any idea?
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C# List of objects, how do I get the sum of a property
I have a list of objects. One property of the individual object entry is amount. How do I get the sum of amount?
4 Answers
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Does use of final keyword in Java improve the performance?
In Java we see lots of places where the final keyword can be used but its use is uncommon.
13 Answers
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Docker EXPOSE a port only to Host
Is docker capable of exposing a port only to the host and not to the outside.
1 Answer
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How to get a number of random elements from an array?
I am working on 'how to access elements randomly from an array in javascript'. I found many links regarding this. Like:
Get random item from JavaScript array
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