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How to empty (“truncate”) a file on linux that already exists and is protected in someway?
I have a file called error.log on my server that I need to frequently truncate. I have rw permissions for the file. Opening the file in vi > deleting all content > saving works (obviously). But when I try the below
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Does Dart support enumerations?
...uilt with attributes that can not be const). That's why I didn't use it in my answer (although I sometimes use const enum in my code).
– Alexandre Ardhuin
Dec 16 '12 at 14:14
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How do I iterate over a range of numbers defined by variables in Bash?
...erformance must be platform specific since the eval version is quickest on my machine.
– Andrew Prock
Apr 2 '14 at 23:25
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Why can't a text column have a default value in MySQL?
...you try to create a TEXT column on a table, and give it a default value in MySQL, you get an error (on Windows at least). I cannot see any reason why a text column should not have a default value. No explanation is given by the MySQL documentation. It seems illogical to me (and somewhat frustrating,...
Selecting multiple columns in a pandas dataframe
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Yes this was implicit in my answer. The bit about the copy was only for use of ix[] if you prefer to use ix[] for any reason.
– ely
Jul 8 '12 at 18:09
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How do I replace NA values with zeros in an R dataframe?
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See my comment in @gsk3 answer. A simple example:
> m <- matrix(sample(c(NA, 1:10), 100, replace = TRUE), 10)
> d <- as.data.frame(m)
V1 V2 V3 V4 V5 V6 V7 V8 V9 V10
1 4 3 NA 3 7 6 6 10 6 5
2 9 8 9 5...
How can I get a view's current width and height when using autolayout constraints?
...t answer and well explained, too. Saved me after an hour or two of pulling my hair out.
– Ben Kreeger
Jul 11 '13 at 15:32
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How to temporarily exit Vim and go back
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What if I want to continue running my server while editing my file. For example, let's say I do nodemon app.js (nodemon refreshes the server on file edits for you) and then I want to return to my vim editing. Can I do that without two separate terminal windows...
How do I install Eclipse Marketplace in Eclipse Classic?
...nt to "All Available Sites", the Helios update repository wasn't there, so my searching turned up no results. Adding the Helios Repository then going to General Purpose Tools revealed it.
– Thomas Owens
Mar 12 '11 at 22:09
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How to merge every two lines into one from the command line?
...e final newline, his sed solution skips the final line in its entirty, and my solution repeats the last line. paste, on the other hand, behaves perfectly. +1.
– ghoti
Mar 11 '14 at 13:42
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