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Ternary operator (?:) in Bash
...
ternary operator ? : is just short form of if/else
case "$b" in
5) a=$c ;;
*) a=$d ;;
esac
Or
[[ $b = 5 ]] && a="$c" || a="$d"
share
|
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Can Mockito stub a method without regard to the argument?
...
when(
fooDao.getBar(
any(Bazoo.class)
)
).thenReturn(myFoo);
or (to avoid nulls):
when(
fooDao.getBar(
(Bazoo)notNull()
)
).thenReturn(myFoo);
Don't forget to import matchers (many others are available):
For Mockito 2.1.0 and newer:
import static org.mockito.ArgumentMatch...
Measuring function execution time in R
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This is much more memory-efficient, then system.time(), which effectively copies its arguments. It is important when you are dealing with data that barely fit into your RAM.
– Adam Ryczkowski
Dec 15 '...
C# code to validate email address
..., not whether an e-mail address is a valid destination to send a message. For that, the only real way is to send a message to confirm.
Note that e-mail addresses are more forgiving than you might first assume. These are all perfectly valid forms:
cog@wheel
"cogwheel the orange"@example.com
123@$....
Const in JavaScript: when to use it and is it necessary?
I've recently come across the const keyword in JavaScript. From what I can tell, it is used to create immutable variables , and I've tested to ensure that it cannot be redefined (in Node.js):
...
Parse string to date with moment.js
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You need to use the .format() function.
MM - Month number
MMM - Month word
var date = moment("2014-02-27T10:00:00").format('DD-MM-YYYY');
var dateMonthAsWord = moment("2014-02-27T10:00:00").format('DD-MMM-YYYY');
FIDDLE
...
Ruby: Merging variables in to a string
I'm looking for a better way to merge variables into a string, in Ruby.
7 Answers
7
...
How can I set Image source with base64
I want to set the Image source to a base64 source but it does not work:
4 Answers
4
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Can I use Class.newInstance() with constructor arguments?
...tance() but the class I am instantiating does not have a nullary constructor. Therefore I need to be able to pass in constructor arguments. Is there a way to do this?
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Changing column names of a data frame
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Use the colnames() function:
R> X <- data.frame(bad=1:3, worse=rnorm(3))
R> X
bad worse
1 1 -2.440467
2 2 1.320113
3 3 -0.306639
R> colnames(X) <- c("good", "better")
R> X
good better
1 1 -2.440467
2 2 1.320113
3 3 -0.306639
You can also sub...