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Replacing NAs with latest non-NA value
In a data.frame (or data.table), I would like to "fill forward" NAs with the closest previous non-NA value. A simple example, using vectors (instead of a data.frame ) is the following:
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How to display hidden characters by default (ZERO WIDTH SPACE ie. ​)
I just lost part of my weekend because of this ... joker - zero width space. I just used some snippets from google groups and didn't recognize that there are doubled characters, because Idea (11) didn't show them, which was causing problems with parsing config file of my app... I discovered it accid...
Find the files that have been changed in last 24 hours
E.g., a MySQL server is running on my Ubuntu machine. Some data has been changed during the last 24 hours.
6 Answers
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Using global variables in a function
How can I create or use a global variable in a function?
20 Answers
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How to deal with persistent storage (e.g. databases) in Docker
How do people deal with persistent storage for your Docker containers?
14 Answers
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Is there a way to make npm install (the command) to work behind proxy?
Read about a proxy variable in a .npmrc file but it does not work. Trying to avoid manually downloading all require packages and installing.
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HTML5 Canvas 100% Width Height of Viewport?
I am trying to create a canvas element that takes up 100% of the width and height of the viewport.
7 Answers
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Ternary Operator Similar To ?:
I am trying to avoid constructs like this:
5 Answers
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How do I insert datetime value into a SQLite database?
I am trying to insert a datetime value into a SQLite database. It seems to be sucsessful but when I try to retrieve the value there is an error:
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