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JavaScript check if variable exists (is defined/initialized)
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'if( variable )' also fails for testing for the existence of object properties.
– scotts
May 4 '10 at 22:40
55
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Singleton: How should it be used
...ct of a type in system" - "...and never want to mock that object in a unit test."
– Cygon
Oct 19 '14 at 18:21
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show 7 more comments
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Remove all line breaks from a long string of text
...ne characters
it takes such a multi-line string which may be messy e.g.
test_str = '\nhej ho \n aaa\r\n a\n '
and produces nice one-line string
>>> ' '.join([line.strip() for line in test_str.strip().splitlines()])
'hej ho aaa a'
UPDATE:
To fix multiple new-line character producin...
How to get the function name from within that function?
... for an anonymous function there won't be a match
}
I have not run unit tests on this, or verified implementation
differences, but in principle it should work, if not leave a comment.
Note: won't work on bound functions
Note: that caller and callee are considered deprecated.
[1] I include it he...
Batch not-equal (inequality) operator
...mally you should turn them on with setlocal, but for a simple if not equal test, just use "if not", it goes back to the good old DOS days
– Anders
Sep 14 '09 at 20:27
add a co...
How to check if a string contains text from an array of substrings in JavaScript?
... then you can cheat a bit, like this:
if (new RegExp(substrings.join("|")).test(string)) {
// At least one match
}
...which creates a regular expression that's a series of alternations for the substrings you're looking for (e.g., one|two) and tests to see if there are matches for any of them, b...
Gradle - getting the latest release version of a dependency
... RELEASE (which is rarely used and deprecated) but it does support Ivy's latest.release. However, the general recommendation is to build against exact versions. Otherwise, the build can become a lottery.
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iPhone: Setting Navigation Bar Title
...line also changes the label for the Tab Bar Item. To avoid this, use what @testing suggested
self.navigationItem.title = @"MyTitle";
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Difference between & and && in Java? [duplicate]
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'&' performs both tests, while '&&' only performs the 2nd test if the first is also true. This is known as shortcircuiting and may be considered as an optimization. This is especially useful in guarding against nullness(NullPointerExce...
puts vs logger in rails rake tasks
...ctiveSupport::Logger.broadcast(ActiveSupport::Logger.new(STDOUT)))
end
Test
Here's a small Rake task to test the above code :
# lib/tasks/stdout_and_log.rake
namespace :stdout_and_log do
desc "Test if Rails.logger outputs to STDOUT and log file"
task :test => :environment do
puts "H...