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Select multiple columns in data.table by their numeric indices
How can we select multiple columns using a vector of their numeric indices (position) in data.table ?
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In C++, if throw is an expression, what is its type?
I picked this up in one of my brief forays to reddit:
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Git merge left HEAD marks in my files
I tried to merge a file in the command line using Git, when an error message appeared telling me the merge was aborted.
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What does -XX:MaxPermSize do?
Specifically, why would it help to fix a PermGen OutOfMemoryError issue?
3 Answers
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Remove the bottom divider of an android ListView
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What is a “Bitmap heap scan” in a query plan?
I want to know the principle of "Bitmap heap scan", I know this often happens
when I execute a query with OR in the condition.
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SQL set values of one column equal to values of another column in the same table
I have a table with two DATETIME columns.
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How to properly handle a gzipped page when using curl?
I wrote a bash script that gets output from a website using curl and does a bunch of string manipulation on the html output. The problem is when I run it against a site that is returning its output gzipped. Going to the site in a browser works fine.
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Rolling back a remote Git repository
I have a remote Git repository, and I need to roll back the last n commits into cold oblivion.
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