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Difference between Mutable objects and Immutable objects [duplicate]
...ny one please give the diff between Mutable objects and Immutable objects with example.
5 Answers
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At runtime, find all classes in a Java application that extend a base class
...follow
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edited Nov 5 '18 at 18:39
answered Feb 11 '12 at 14:29
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Input with display:block is not a block, why not?
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Check out what I came up with, a solution using the relatively unknown box-sizing:border-box style from CSS 3. This allows a 'true' 100% width on any element regardless of that elements' padding and/or borders.
<!DOCTYPE html PUBLIC "-//W3C//DTD ...
Drop data frame columns by name
...to keep and refer to them by name :
keeps <- c("y", "a")
DF[keeps]
EDIT :
For those still not acquainted with the drop argument of the indexing function, if you want to keep one column as a data frame, you do:
keeps <- "y"
DF[ , keeps, drop = FALSE]
drop=TRUE (or not mentioning it) will ...
What is the difference between ~> and >= when specifying rubygem in Gemfile?
...at's a pessimistic version constraint. RubyGems will increment the last digit in the version provided and use that until it reaches a maximum version. So ~>0.8.5 is semantically equivalent to:
gem "cucumber", ">=0.8.5", "<0.9.0"
The easy way to think about it is that you're okay with the ...
getString Outside of a Context or Activity
...e for keeping hardcoded strings out of my code, and I'd like to keep using it in a utility class that works with models in my application to generate output. For instance, in this case I am generating an email from a model outside of the activity.
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How do I run a terminal inside of Vim?
...use that solution.
Vim 8.1 now has a built in terminal that can be opened with the :term command. This provides much more complete integration with the rest of the Vim features.
I would definitely recommend screen for something like this. Vim is a text editor, not a shell.
I would use Ctrl+AS to s...
@selector() in Swift?
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Swift itself doesn't use selectors — several design patterns that in Objective-C make use of selectors work differently in Swift. (For example, use optional chaining on protocol types or is/as tests instead of respondsToSelector:...
Breaking up long strings on multiple lines in Ruby without stripping newlines
...aracters. Since this is a Rails project, we often have strings that are a little bit longer - i.e. " User X wanted to send you a message about Thing Y " that doesn't always fit within the 80 character style limit.
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Most efficient way to make the first character of a String lower case?
...n 1.
Results
Benchmark Mode Cnt Score Error Units
MyBenchmark.test1 thrpt 20 10463220.493 ± 288805.068 ops/s
MyBenchmark.test2 thrpt 20 14730158.709 ± 530444.444 ops/s
MyBenchmark.test3 thrpt 20 16079551.751 ± 56884.357 ops/s
MyBenchmark.test4 thrpt ...