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Append an object to a list in R in amortized constant time, O(1)?
...
$b
[1] "dick"
$c
[1] "harry"
R> class(LL)
[1] "list"
R>
That works on vectors too, so do I get the bonus points?
Edit (2015-Feb-01): This post is coming up on its fifth birthday. Some kind readers keep repeating any shortcomings with it, so by all means also see some of the comments b...
Functional programming - is immutability expensive? [closed]
...n two parts. The first is conceptual. The next looks at the same question more concretely in Scala.
9 Answers
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How would you compare jQuery objects?
...w DOM elements, e.g.:
if ($(this).parent().get(0) === $('body').get(0))
or
if ($(this).parent()[0] === $('body')[0])
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Android Emulator: Installation error: INSTALL_FAILED_VERSION_DOWNGRADE
... with the same packageName as an app that's already installed on the emulator, but the one you're trying to install has a lower versionCode (integer value for your version number).
You might have installed from a separate copy of the code where the version number was higher than the copy you're wor...
Cannot change column used in a foreign key constraint
I got this error when i was trying to alter my table.
3 Answers
3
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GitHub: What is a “wip” branch?
When I was browsing GitHub repositories I quite often saw "wip" branches (e.g. 3.1.0-wip ). What does "wip" mean?
3 Answer...
How to determine if a process runs inside lxc/Docker?
...whether they run inside a virtual machine, is something similar available for lxc/docker?
15 Answers
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How to sum a variable by group
I have a data frame with two columns. First column contains categories such as "First", "Second", "Third", and the second column has numbers that represent the number of times I saw the specific groups from "Category".
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How to delay the .keyup() handler until the user stops typing?
I’ve got a search field. Right now it searches for every keyup. So if someone types “Windows”, it will make a search with AJAX for every keyup: “W”, “Wi”, “Win”, “Wind”, “Windo”, “Window”, “Windows”.
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What's the difference between a mock & stub?
...stinction is that a stub you have already written with predetermined behavior. So you would have a class that implements the dependency (abstract class or interface most likely) you are faking for testing purposes and the methods would just be stubbed out with set responses. They would not do anythi...