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How to find if a given key exists in a C++ std::map
I'm trying to check if a given key is in a map and somewhat can't do it:
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How to succinctly write a formula with many variables from a data frame?
Suppose I have a response variable and a data containing three covariates (as a toy example):
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Why do we need virtual functions in C++?
I'm learning C++ and I'm just getting into virtual functions.
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Join a list of items with different types as string in Python
I need to join a list of items. Many of the items in the list are integer values returned from a function; i.e.,
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How to declare an array in Python?
How do I declare an array in Python ?
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Get Slightly Lighter and Darker Color from UIColor
I was looking to be able to turn any UIColor into a gradient. The way I am intending to do this is by using Core Graphics to draw a gradient. What I am trying to do is to get a color, lets say:
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When to use @QueryParam vs @PathParam
I am not asking the question that is already asked here:
What is the difference between @PathParam and @QueryParam
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Significant new inventions in computing since 1980
This question arose from comments about different kinds of progress in computing over the last 50 years or so.
129 Answer...
What does |= (ior) do in Python?
Google won't let me search |= so I'm having trouble finding relevant documentation. Anybody know?
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Dismissing a Presented View Controller
I have a theoretic question. Now İ'm reading Apple's ViewController guide.
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