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When to use an assertion and when to use an exception
...handled during development, but not in production (when assertions are typically disabled)?
– herman
Sep 14 '13 at 14:09
72
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Convert string to symbol-able in ruby
...ils got ActiveSupport::CoreExtensions::String::Inflections module that provides such methods. They're all worth looking at. For your example:
'Book Author Title'.parameterize.underscore.to_sym # :book_author_title
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Find the day of a week
...y names
c("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
"Friday", "Saturday")[as.POSIXlt(df$date)$wday + 1]
## [1] "Wednesday" "Wednesday" "Thursday"
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How to get current date & time in MySQL?
...Create your 'servers' table as following :
CREATE TABLE `servers`
(
id int(11) NOT NULL PRIMARY KEY auto_increment,
server_name varchar(45) NOT NULL,
online_status varchar(45) NOT NULL,
_exchange varchar(45) NOT NULL,
disk_space varchar(45) NOT NULL,
network_sha...
Taking screenshot on Emulator from Android Studio
...tion but still, I don't know how to take a screenshot of Emulator via Android Studio. I recently switched from Eclipse to Android Studio and I could not find it anywhere, I tried to search on web too but no help.
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How to define “type disjunction” (union types)?
..."str")
case _: Int => println("int")
}
}
And that's it. You can call foo(5) or foo("abc"), and it will work, but try foo(true) and it will fail. This could be side-stepped by the client code by creating a StringOrInt[Boolean], unless, as noted by Randall below, you make StringOrInt a seal...
Print a list of all installed node.js modules
...ered Dec 21 '12 at 0:05
Andrey SidorovAndrey Sidorov
22.2k44 gold badges5656 silver badges7171 bronze badges
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Pandas convert dataframe to array of tuples
...you want normal tuples in your zip iterator (instead of namedtuples), then call: data_set.itertuples(index=False, name=None)
– Axel
Oct 25 '17 at 9:47
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How do I declare and initialize an array in Java?
...d in the enclosing scope (function or whatever). After returning it to the caller, it is no longer valid. Using the new keyword you allocate the new object from the heap and it is valid outside the defining scope.
– teukkam
Oct 18 '16 at 9:55
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Eclipse JUNO doesn't start
...'t really understand why. What is this .snap file?
– Ida
Feb 26 '13 at 4:29
1
I think ist kind of...