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How can I remove all objects but one from the workspace in R?
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require(gdata)
keep(object_1,...,object_n,sure=TRUE)
ls()
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How to use Git?
... just edit the Answer (added an alternate to a dead link). If not, let me know. (I figured it's easier to just ask YOU than to find the rule on this)
– Clay Nichols
Aug 14 '16 at 16:22
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Undo a merge by pull request?
Someone accepted a pull request which they shouldn't have. Now we have a bunch of broken code merged in. How do you undo a pull request? I was just going to revert the changes to the commit just before the merge, but I noticed that it merged in a bunch of commits. So now there are all these commits ...
How to hash a password
... the almost all kind of tasks. Its vulnerabilities also refers to very specific situations and almost requires for attacker to know a lot about cryptography.
– zerkms
Nov 15 '10 at 3:40
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Ruby / Rails - Change the timezone of a Time, without changing the value
...Suppose the target time to convert is after the D/ST transition while Time.now is before the change. Would that work ?
– Cyril Duchon-Doris
Oct 26 '16 at 18:42
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What is the maximum depth of the java call stack?
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if we don't mention the Xss, then?
– a3.14_Infinity
Jul 4 '16 at 7:52
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What is the purpose of .PHONY in a Makefile?
...y're not associated with files, e.g.:
.PHONY: clean
clean:
rm -rf *.o
Now make clean will run as expected even if you do have a file named clean.
In terms of Make, a phony target is simply a target that is always out-of-date, so whenever you ask make <phony_target>, it will run, independ...
How much faster is C++ than C#?
Or is it now the other way around?
29 Answers
29
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H2 in-memory database. Table not found
...hbm2ddl closes the connection after creating the table, so h2 discards it.
If you have your connection-url configured like this
jdbc:h2:mem:test
the content of the database is lost at the moment the last connection is closed.
If you want to keep your content you have to configure the url like this
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Ignoring SSL certificate in Apache HttpClient 4.3
How to ignore SSL certificate (trust all) for Apache HttpClient 4.3 ?
16 Answers
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