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How to check if a DateTime occurs today?
Is there a better .net way to check if a DateTime has occured 'today' then the code below?
13 Answers
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Extract a regular expression match
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Use the new stringr package which wraps all the existing regular expression operates in a consistent syntax and adds a few that are missing:
library(stringr)
str_locate("aaa12xxx", "[0-9]+")
# start end
# [1,] 4 5
str_extract("aaa12xxx"...
Regular expression for a hexadecimal number?
...e shortified to /0x[\da-f]/i, but otherwise, +1.
– Niklas B.
Feb 10 '12 at 1:13
20
@NiklasB. Your...
How to remove text from a string?
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MathleticsMathletics
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How to access the last value in a vector?
... a vector that is nested in a dataframe one or two levels. Is there a quick and dirty way to access the last value, without using the length() function? Something ala PERL's $# special var?
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How can I read a function's signature including default argument values?
...int(inspect.getargspec(foo))
# ArgSpec(args=['a', 'b', 'x'], varargs=None, keywords=None, defaults=('blah',))
However, note that inspect.getargspec() is deprecated since Python 3.0.
Python 3.0--3.4 recommends inspect.getfullargspec().
Python 3.5+ recommends inspect.signature().
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jQuery select by attribute using AND and OR operators
I'm thinking about, if it is possible in jQuery to select elements by named attributes using AND and OR.
8 Answers
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How can I initialise a static Map?
... why you need an extra anonymous class just to initialize. And it won't work if the class being created is final.
You can create an immutable map using a static initialiser too:
public class Test {
private static final Map<Integer, String> myMap;
static {
Map<Integer, Stri...
Calculating days between two dates with Java
...ntln ("Days: " + daysBetween);
} catch (ParseException e) {
e.printStackTrace();
}
Note that this solution will give the number of actual 24 hour-days, not the number of calendar days. For the latter, use
long daysBetween = ChronoUnit.DAYS.between(date1, date2)
Original answer (outdated ...
What does InitializeComponent() do, and how does it work in WPF?
What does InitializeComponent() do, and how does it work in WPF?
2 Answers
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