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R - Concatenate two dataframes?
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if you're rbind is coming from base for some strange reason: I used rbind.data.frame
– Boern
May 2 '18 at 12:42
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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...Additionally, when the dplyr library is loaded it even reports masking the base setdiff() function that works on two vectors: stat.ethz.ch/R-manual/R-devel/library/base/html/sets.html. Maybe you have loaded the lubridate library after dplyr and it is suggesting it as the source in the tabcomplete li...
Rails 4 - Strong Parameters - Nested Objects
...gotten the class name but it's something like ActionController::Parameters based on this page).
– nayiaw
Apr 18 '18 at 10:12
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Null coalescing in powershell
... 'Unknown' -ne $null)[0] | Write-Output
Explanation
This explanation is based on an edit suggestion from an anonymous user. Thanks, whoever you are!
Based on the order of operations, this works in following order:
The , operator creates an array of values to be tested.
The -ne operator filter...
Learning Ant path style
...ncepts and Types" => [List of Types] left menu section => "Directory-based Tasks" => [Patterns] page section.
– informatik01
Feb 25 '14 at 14:55
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What's the proper way to install pip, virtualenv, and distribute for Python?
...nterpreter you want for your first environment:
PYTHON=$(which python)
URL_BASE=https://pypi.python.org/packages/source/v/virtualenv
# --- Real work starts here ---
curl -O $URL_BASE/virtualenv-$VERSION.tar.gz
tar xzf virtualenv-$VERSION.tar.gz
# Create the first "bootstrap" environment.
$PYTHON vi...
How to disassemble one single function using objdump?
...ed. Is it possible to disassemble all of them or I should disassemble them based on raw address?
– TheAhmad
Jan 25 at 14:36
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Create objective-c class instance by name?
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The OP's use-case is more than legit - it is the base for any serialization of object hierarchy to file/memory-block/plist/whatever. Many times you DO NOT KNOW in advance which classes you'll need to instantiate. My use-case is the tedious need to "register" gazillion "NSVa...
How to apply unmerged upstream pull requests from other forks into my fork?
...at have been added between the origin and the pull request, you can just rebase the branch on which the pull request was formed
git rebase master otherfork/pullrequest-branch
If you only want the commits in the pull request, identify their SHA1 and do
git cherry-pick <first-SHA1> <second...
Parsing XML with namespace in Python via 'ElementTree'
... xml.etree import ElementTree
>>> my_schema = u'''<rdf:RDF xml:base="http://dbpedia.org/ontology/"
... xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
... xmlns:owl="http://www.w3.org/2002/07/owl#"
... xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
... xmlns:rdfs="...