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Simultaneously merge multiple data.frames in a list
...7 19 NA NA 0.3800352
And here's an example using these data to replicate my.list:
merged.data.frame = Reduce(function(...) merge(..., by=match.by, all=T), my.list)
merged.data.frame[, 1:12]
# matchname party st district chamber senate1993 name.x v2.x v3.x v4.x senate1994 name.y
#1 ALGIERE 2...
Create PostgreSQL ROLE (user) if it doesn't exist
...log.pg_roles -- SELECT list can be empty for this
WHERE rolname = 'my_user') THEN
CREATE ROLE my_user LOGIN PASSWORD 'my_password';
END IF;
END
$do$;
(Building on @a_horse_with_no_name's answer and improved with @Gregory's comment.)
Unlike, for instance, with CREATE TABLE there ...
How to tell Xcode where my info.plist and .pch files are
I renamed my project and it's files and now Xcode is still looking for the old info.plist file. Where do I set the locations of the .plist and .pch files that it needs.
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Why are Docker container images so large?
... you for your effort to investigate the case, and yes i was able to reduce my image size to roughly 635MB (this is the value presented as virtual image size after execution of docker images). Is it possible to remove/delete/destroy those old layers? To be more specific: i would like to completely re...
How to fix: android.app.RemoteServiceException: Bad notification posted from package *: Couldn't cre
.... In other words, this isn't fixable is it? I'm seeing the same crashes in my app.
– Matthias
Oct 5 '14 at 17:03
It do...
What's the difference between Perl's backticks, system, and exec?
...
perlcunc, maybe this will be my new nick name;-)
– Ludwig Weinzierl
Apr 28 '09 at 22:51
8
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How to connect to my http://localhost web server from Android Emulator
What can I do in the Android emulator to connect it to my localhost web server page at http://localhost or http://127.0.0.1 ?
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Sending email in .NET through Gmail
Instead of relying on my host to send an email, I was thinking of sending the email messages using my Gmail account. The emails are personalized emails to the bands I play on my show.
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What's the safest way to iterate through the keys of a Perl hash?
... keys and do not plan to ever read any of the values, use keys():
foreach my $key (keys %hash) { ... }
If you just want the values, use values():
foreach my $val (values %hash) { ... }
If you need the keys and the values, use each():
keys %hash; # reset the internal iterator so a prior each()...
Why does my 'git branch' have no master?
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I created my repo with git init and the master branch was not created. With Github, the branch is created automatically, but not with Bitbucket. The mising steps were: git add ., git commit -m "Test", then git push -u origin master.
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