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Difference between as.POSIXct/as.POSIXlt and strptime for converting character vectors to POSIXct/PO

...character vectors to datetime classes. I often see 2 methods, the strptime and the as.POSIXct/as.POSIXlt methods. I looked at the 2 functions but am unclear what the difference is. ...
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SQL SELECT speed int vs varchar

I'm in the process of creating a table and it made me wonder. 9 Answers 9 ...
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What does addChildViewController actually do?

I'm just dipping my feet for the first time into iOS development, and one of the first things I've had to do is implement a custom container view controller - lets call it SideBarViewController - that swaps out which of several possible child view controllers it shows, almost exactly like a stan...
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How to say “should_receive” more times in RSpec

...swer below for 2 times: Project.should_receive(:find).twice.with(@project).and_return(@project) for exactly n times: Project.should_receive(:find).exactly(n).times.with(@project).and_return(@project) for at least n times: Project.should_receive(:msg).at_least(n).times.with(@project).and_return(@pr...
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AWS Error Message: A conflicting conditional operation is currently in progress against this resourc

...ault to US region (used AWSCLI) realized, the bucket shall go to EU region and deleted it (used AWS console) (few minutes later) tried to create the bucket, specifying the EU region At step 3, AWS console has shown me the error message from title of your question. So I guess, that the bucket in U...
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Template function inside template class

... void MyClass<T>::foo() { U a; a.invoke(); } and it works – Michael Dec 27 '11 at 1:39 ...
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Using TortoiseSVN how do I merge changes from the trunk to a branch and vice versa?

...en reading up on branching/merging with Subversion 1.5 using the excellent and free Version Control with Subversion book. I think that I understand how to use the Subversion command line client to perform the actions that I need most often, which are: ...
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How can a LEFT OUTER JOIN return more records than exist in the left table?

...ave a very basic LEFT OUTER JOIN to return all results from the left table and some additional information from a much bigger table. The left table contains 4935 records yet when I LEFT OUTER JOIN it to an additional table the record count is significantly larger. ...
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Can an AJAX response set a cookie?

...f the user agent supports HTTP State Management it should persist, discard and send cookies (as received in the Set-Cookie response header, and sent in the Cookie header) as applicable. -- from w3.org/TR/XMLHttpRequest – smwikipedia Jan 6 '16 at 13:48 ...
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Comments in command-line Zsh

I switched quite recently from Bash to Zsh on Ubuntu and I'm quite happy about it. However, there is something I really miss and I did not find how to achieve the same thing. ...