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How to see if an object is an array without using reflection?
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Worth adding that you can find out the array type by using obj.getClass().getComponentType().
– Steve Chambers
Jun 24 '19 at 11:23
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Reset the database (purge all), then seed a database
...en recreates the database and includes your seeds.rb file.
http://guides.rubyonrails.org/migrations.html#resetting-the-database
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How to switch back to 'master' with git?
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iPhone Data Usage Tracking/Monitoring
...in Apple forum that :
The OS does not keep network statistics on a process-by-process basis. As such, there's no exact solution to this problem. You can, however, get network statistics for each network interface.
In general en0 is your Wi-Fi interface and pdp_ip0 is your WWAN interface.
There is ...
Asserting successive calls to a mock method
... @jpmc26 could you elaborate more on your edit? What do you mean by 'best left unmocked'? How else would you test if a call has been made within a method
– otgw
Dec 15 '15 at 16:04
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How to deal with SettingWithCopyWarning in Pandas?
...inal, and modifying the copy has no effect on the original.
As mentioned by other answers, the SettingWithCopyWarning was created to flag "chained assignment" operations. Consider df in the setup above. Suppose you would like to select all values in column "B" where values in column "A" is > 5....
error: ‘NULL’ was not declared in this scope
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Now that C++11 is more generally supported by compilers, it might be worth mentioning the nullptr keyword, which is an actual keyword and doesn't require any #includes. It's also more typesafe than NULL.
– templatetypedef
Mar 10 ...
What is the purpose of the word 'self'?
...ly needs to be added to every function as a parameter. To illustrate, in Ruby I can do this:
24 Answers
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Chained method calls indentation style in Python [duplicate]
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This is one of the few things I wish python black did by default. Fluent apis turn ugly real quick.
– aaaaaa
Dec 26 '18 at 23:16
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How do I break out of a loop in Scala?
...n notice, so if you could break out of things, you'd probably be surprised by where the code flow ended up (especially with closures). Third, most of Scala's "loops" aren't actually normal loops--they're method calls that have their own loop, or they are recursion which may or may not actually be a...