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Omitting the second expression when using the if-else shorthand
Can I write the if else shorthand without the else ?
8 Answers
8
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PHP's array_map including keys
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Not with array_map, as it doesn't handle keys.
array_walk does:
$test_array = array("first_key" => "first_value",
"second_key" => "second_value");
array_walk($test_array, function(&$a, $b) { $a = "$b loves $a"; });
var_dump($tes...
Statistics: combinations in Python
... +1 for suggesting to write something simple, for using reduce, and for the cool demo with pascal triangle
– jon_darkstar
Nov 8 '10 at 15:32
6
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How can two strings be concatenated?
...of the vector to be collapsed.
You can even combine both:
> paste(x, "and some more", sep="|-|", collapse="--")
[1] "Hello|-|and some more--World|-|and some more"
Hope this helps.
share
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imp...
Positioning MKMapView to show multiple annotations at once
...ine, but I want to resize the map to fit all annotations onscreen at once, and I'm not sure how to do this.
24 Answers
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Is there a way to break a list into columns?
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If you want a preset number of columns, you can use column-count and column-gap, as mentioned above.
However, if you want a single column with limited height that would break into more columns if needed, this can be achieved quite simply by changing display to flex.
This will not work o...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
...ata frames can become tedious if they are being pulled from separate files and not all factor levels appear in each file.
One way to address this is to create a custom manual colour scale as follows:
#Some test data
dat <- data.frame(x=runif(10),y=runif(10),
grp = rep(LETTERS[1:5],each ...
Notepad++ show open files on the left
...nces -> General, check "Show" in the "Document List Panel" area. EDIT: And now I see that the next answer (which has many more votes) already explained this.
– GordonM
Oct 11 '17 at 4:20
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How can I perform a reverse string search in Excel without using VBA?
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This one is tested and does work (based on Brad's original post):
=RIGHT(A1,LEN(A1)-FIND("|",SUBSTITUTE(A1," ","|",
LEN(A1)-LEN(SUBSTITUTE(A1," ","")))))
If your original strings could contain a pipe "|" character, then replace both in ...
What does 'stale file handle' in Linux mean?
Say I have a terminal open, and through that terminal I have cd 'ed to some directory. Through another terminal, I delete that directory and restore it back from an identical backup. When I try to vim a file from the first terminal, in the same directory, why do I get an error about a stale file ...