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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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edited Jun 20 at 9:12
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answered Sep 10 '12 at 14:41
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UIPopovercontroller dealloc reached while popover is still visible
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203
UIPopoverControllers should always be held in an instance variable. It is a good practice to cr...
In Python, how do you convert seconds since epoch to a `datetime` object?
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datetime.datetime.fromtimestamp will do, if you know the time zone, you could produce the same o...
How do I revert master branch to a tag in git?
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160
You can do
git checkout master
git reset --hard tag_ABC
git push --force origin master
Please...
Why doesn't the JVM cache JIT compiled code?
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edited Jan 2 '10 at 19:24
answered Jan 2 '10 at 19:18
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Fatal error: Class 'ZipArchive' not found in
I have a problem that I install 'Archive_Zip 0.1.1' on Linux server, but when I try to run the script to create the zip file it gives the fatal error
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How to get CSS to select ID that begins with a string (not in Javascript)?
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edited Jun 30 '15 at 11:53
answered Jul 15 '12 at 23:58
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How to apply `git diff` patch without Git installed?
...hfile if you need handle file adds, deletes and renames.
EDIT December 2015
Latest versions of patch command (2.7, released in September 2012) support most features of the "diff --git" format, including renames and copies, permission changes, and symlink diffs (but not yet binary diffs) (release...
What happened to “Always refresh from server” in IE11 developer tools?
...e the "Always refresh from server" feature of the developer tools in IE 8-10?
5 Answers
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How do I get the last character of a string?
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public static void main(String args[]) {
String string = args[0];
System.out.println("last character: " +
string.substring(string.length() - 1));
}
}
The output of java Test abcdef:
last character: f
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