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How to find the size of localStorage
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Depends on the character set (i.e. utf8, etc) which that doesn't account for
– jas-
Sep 24 '14 at 11:18
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Replacing NAs with latest non-NA value
...ewhat slower because it does some more checks and handles multiple columns etc.
– Achim Zeileis
Mar 2 '17 at 15:28
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Any reason not to use '+' to concatenate two strings?
... matter of other Python implementations, such as pypy, jython, ironpython, etc...
– jsbueno
Apr 6 '12 at 13:50
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How to tell if a string is not defined in a Bash shell script
... value, ${foo:?error message} to display an error message if foo is unset, etc.
– Jouni K. Seppänen
Oct 23 '08 at 4:54
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DESTDIR and PREFIX of make
...hat it's worth, in a cmake-based build you can emulate "case 4" (for stow, etc) by running cmake -DCMAKE_INSTALL_PREFIX=/foo/bar/baz -P cmake_install.cmake in the build directory.
– Ryan Pavlik
Sep 6 '12 at 17:12
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data.table vs dplyr: can one do something well the other can't or does poorly?
...ll become a column in result. You can use c(), as.list(), lapply(), list() etc... base functions to accomplish this, without having to learn any new functions.
You will need to learn just the special variables - .N and .SD at least. The equivalent in dplyr are n() and .
Joins
dplyr provides s...
jQuery .hasClass() vs .is()
... is is multi-purpose, you can for example do is('.class'), is(':checked'), etc which means is has more to do where is hasClass is limited which only checks for a class being set or not.
Hence, hasClass should be faster if performance at any level is your priority.
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How can I get nth element from a list?
...hat the standard library contains some such partial functions (head, last, etc.). For safety, use an option type Maybe, or the Safe module.
Example of a reasonably efficient, robust total (for indices ≥ 0) indexing function:
data Maybe a = Nothing | Just a
lookup :: Int -> [a] -> Maybe a
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What is the difference between “def” and “val” to define a function
... x % 2 == 0)" function (not any other statement before i.e. println("val") etc. Invoking event2 with different parameters will actually invoke "(x => x % 2 == 0)" code, as only that is saved with event2.
scala> even2(2)
res7: Boolean = true
scala> even2(3)
res8: Boolean = false
Just to ...
jQuery: keyPress Backspace won't fire?
...is; setTimeout( function(){
/** Code that processes backspace, etc. **/
}, 100 );
} );
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