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How to check if a given directory exists in Ruby
...ld use Kernel#test:
test ?d, 'some directory'
it gets it's origins from https://ss64.com/bash/test.html
you will notice bash test has this flag -d to test if a directory exists
-d file True if file is a Directory. [[ -d demofile ]]
...
How can I use MS Visual Studio for Android Development?
...eeding to install Visual Studio. For more details see
Visuals Studio 2015
https://www.visualstudio.com/en-us/downloads/visual-studio-2015-downloads-vs
Visual Studio Emulator
https://www.visualstudio.com/en-us/features/msft-android-emulator-vs.aspx
Video of features https://channel9.msdn.com/Event...
How can I assign the output of a function to a variable using bash?
...ed often, e.g. functions ending in echo "$returnstring"
This is relevant. https://stackoverflow.com/a/38997681/5556676
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How do I determine which iOS SDK I have?
...ing the xcode-select command above should do the trick for you ;)
Source: https://github.com/fastlane/fastlane/issues/12784
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passing several arguments to FUN of lapply (and others *apply)
...iple Lists or Vector Arguments:
mapply(myfun, arg1, arg2)
See man page:
https://stat.ethz.ch/R-manual/R-devel/library/base/html/mapply.html
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Twitter Bootstrap Button Text Word Wrap
...p">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>
https://getbootstrap.com/docs/4.4/utilities/text/#text-wrapping-and-overflow
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How should I write tests for Forms in Django?
...
https://docs.djangoproject.com/en/stable/topics/testing/tools/#django.test.SimpleTestCase.assertFormError
from django.tests import TestCase
class MyTests(TestCase):
def test_forms(self):
response = self.client.p...
How can I update NodeJS and NPM to the next versions?
... ever a bug in the update command.) In those cases, you can do this:
curl https://www.npmjs.com/install.sh | sh
To update Node.js itself, I recommend you use nvm, the Node Version Manager.
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How do you delete an ActiveRecord object?
...on condition
threshold_age = 20
User.where(age: threshold_age).delete_all
https://www.rubydoc.info/docs/rails/ActiveRecord%2FNullRelation:delete_all
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HTML/Javascript change div content
...s and firefox (3x faster than chrome!)
You can test it in your machine: https://jsperf.com/js-jquery-html-content-change
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