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Working with huge files in VIM
I tried opening a huge (~2GB) file in VIM but it choked. I don't actually need to edit the file, just jump around efficiently.
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What does .SD stand for in data.table in R
.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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Is there a NumPy function to return the first index of something in an array?
I know there is a method for a Python list to return the first index of something:
13 Answers
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How to show a dialog to confirm that the user wishes to exit an Android Activity?
I've been trying to show a "Do you want to exit?" type of dialog when the user attempts to exit an Activity.
11 Answers
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How to get the selected index of a RadioGroup in Android
Is there an easy way to get the selected index of a RadioGroup in Android or do I have to use OnCheckedChangeListener to listen for changes and have something that holds the last index selected?
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Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
I've been profiling some of our core math on an Intel Core Duo, and while looking at various approaches to square root I've noticed something odd: using the SSE scalar operations, it is faster to take a reciprocal square root and multiply it to get the sqrt, than it is to use the native sqrt opcode!...
How do I delete rows in a data frame?
I have a data frame named "mydata" that looks like this this:
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What is the main purpose of setTag() getTag() methods of View?
What is the main purpose of such methods as setTag() and getTag() of View type objects?
7 Answers
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Uri to default sound notification?
I use the Notification.Builder to build a notification.
Now I want to use the default sound notification with:
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How to catch integer(0)?
Let's say we have a statement that produces integer(0) , e.g.
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