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Returning multiple objects in an R function [duplicate]
...t;-" type "<<-". The function will recursively and repeatedly search one functional level higher for an object of that name. If it can't find one, it will create one on the global level.
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Is there a Java reflection utility to do a deep comparison of two objects?
I'm trying to write unit tests for a variety of clone() operations inside a large project and I'm wondering if there is an existing class somewhere that is capable of taking two objects of the same type, doing a deep comparison, and saying if they're identical or not?
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How to map and remove nil values in Ruby
...sed, I think it probably makes sense to switch the accepted answer to this one. I'm not sure what the etiquette is here though, whether you generally give the existing accepted response a chance to update? I'd argue this is the first answer referencing the new approach in 2.7, so should become the a...
How do I ignore a directory with SVN?
...nd I bumped my head into this for a while.)
– Erik Aronesty
May 2 '12 at 16:24
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Ruby: Easiest Way to Filter Hash Keys?
...ice method which was previously only available in Rails.
Example:
> { one: 1, two: 2, three: 3 }.slice(:one, :two)
=> {:one=>1, :two=>2}
End of edit. What follows is the original answer which I guess will be useful if you're on Ruby < 2.5 without Rails, although I imagine that cas...
Changing API level Android Studio
... existent project...
Update build.gradle(Module: app) - Make sure is the one under Gradle Script and it is NOT build.gradle(Project: yourproject).
An example of build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
buildToolsVersion "28.0.2"
defaultC...
How to match “any character” in regular expression?
...ny char
\. = the actual dot character
.? = .{0,1} = match any char zero or one times
.* = .{0,} = match any char zero or more times
.+ = .{1,} = match any char one or more times
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Indenting #defines
...preprocessing token or in a partial comment. Each comment is replaced by
one space character. New-line characters are retained. Whether each nonempty
sequence of white-space characters other than new-line is retained or replaced by
one space character is implementation-defined.
Preprocessing...
What are the advantages of using a schema-free database like MongoDB compared to a relational databa
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@KyleBanker: No worries, just commenting in case someone sees it in 2013 and gets the wrong idea. :) +1 for the edit.
– Sasha Chedygov
Mar 26 '13 at 18:20
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Is it safe to remove selected keys from map within a range loop?
How can one remove selected keys from a map?
Is it safe to combine delete() with range, as in the code below?
4 Answers
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