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Change one value based on another value in pandas

I'm trying to reprogram my Stata code into Python for speed improvements, and I was pointed in the direction of PANDAS. I am, however, having a hard time wrapping my head around how to process the data. ...
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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?

Can someone give me a quick summary of what a ViewModelLocator is, how it works, and what the pros/cons are for using it compared to DataTemplates? ...
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Why doesn't Dijkstra's algorithm work for negative weight edges?

Can somebody tell me why Dijkstra's algorithm for single source shortest path assumes that the edges must be non-negative. ...
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How do you print in a Go test using the “testing” package?

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Callback when CSS3 transition finishes

I'd like to fade out an element (transitioning its opacity to 0) and then when finished remove the element from the DOM. 5 ...
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Change date of git tag (or GitHub Release based on it)

I'm adding Releases to my projects on GitHub by adding tags to various commits in the Main branch. 3 Answers ...
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When do I need to use Begin / End Blocks and the Go keyword in SQL Server?

Can someone tell me when and where I need to use begin and end blocks in SQL Server? Also, what exactly does the Go keyword do? ...
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mongodb group values by multiple fields

For example, I have these documents: 3 Answers 3 ...
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C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++11 tuple 这一篇就够了tuple元组定义了一个有固定数目元素的容器,其中的每个元素类型都可以不相同,这与其他容器有着本质的区别 是对pair的泛化。首先来介绍元组的 tuple元组定义了一个有固定数目元素的容器,其中的每个元素...
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C++/COM VARIANT实现二维数组 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++/COM VARIANT实现二维数组VARIANT变量是COM组件之间互相通信的重要的参数变量之一,它可以容纳多种不同的类型,如short、long、double等,包括各类指针和数组。组件...VARIANT变量是COM组件之间互相通信的重要的参数变量之一,它可...