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How to assign from a function which returns more than one value?
...t hand side be written using list[...] like this:
library(gsubfn) # need 0.7-0 or later
list[a, b] <- functionReturningTwoValues()
If you only need the first or second component these all work too:
list[a] <- functionReturningTwoValues()
list[a, ] <- functionReturningTwoValues()
list[,...
Linux, Why can't I write even though I have group permissions?
...
200
Did you logout and log back in after making the group changes? See:
Super User answer involving...
Chrome Extension Message passing: response not sent
...ging documentation (the difference is here: codereview.chromium.org/1874133002/patch/80001/90002).
– Rob W
Jun 16 '16 at 22:56
10
...
if A vs if A is not None:
...peration bool(); should return False or True, or their integer equivalents 0 or 1. When this method is not defined, __len__() is called, if it is defined, and the object is considered true if its result is nonzero. If a class defines neither __len__() nor __nonzero__(), all its instances are conside...
Ruby: How to turn a hash into HTTP parameters?
...es = {:a => "a", :b => ["c", "d", "e"]}
uri.query
# => "a=a&b[0]=c&b[1]=d&b[2]=e"
uri.query_values = {:a => "a", :b => [{:c => "c", :d => "d"}, {:e => "e", :f => "f"}]}
uri.query
# => "a=a&b[0][c]=c&b[0][d]=d&b[1][e]=e&b[1][f]=f"
uri.query_va...
\d is less efficient than [0-9]
I made a comment yesterday on an answer where someone had used [0123456789] in a regular expression rather than [0-9] or \d . I said it was probably more efficient to use a range or digit specifier than a character set.
...
Counting array elements in Python [duplicate]
...
304
The method len() returns the number of elements in the list.
Syntax:
len(myArray)
Eg:
myAr...
How to initialize all the elements of an array to any specific value in java
... the elements to a specific value? Whenever we write int[] array=new int[10]; , this simply initialize an array of size 10 having all elements equal to zero. I just want to change this initialization integer for one of my array. i.e. I want to initialize an array which has all elements equal to -...
“Deprecation warning: moment construction falls back to js Date” when trying to convert RFC2822 date
...
+50
To get rid of the warning, you need to either:
Pass in an ISO formatted version of your date string:
moment('2014-04-23T09:54:51');...
How to split a file into equal parts, without breaking individual lines? [duplicate]
...= ${lines_per_file}"
wc -l xyzzy.*
This outputs:
Total lines = 70
Lines per file = 12
12 xyzzy.aa
12 xyzzy.ab
12 xyzzy.ac
12 xyzzy.ad
12 xyzzy.ae
10 xyzzy.af
70 total
More recent versions of split allow you to specify a number of CHUNKS with the -n/--number option. You ...