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Returning value from called function in a shell script
...ho "directory not created"
else
echo "directory already created"
fi
3. Share variable
lockdir="somedir"
retval=-1
testlock(){
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
r...
What is the difference between map and flatMap and a good use case for each?
...wo line-lengths:
rdd.map(_.length).collect
res1: Array[Int] = Array(13, 16)
But flatMap (loosely speaking) transforms an RDD of length N into a collection of N collections, then flattens these into a single RDD of results.
rdd.flatMap(_.split(" ")).collect
res2: Array[String] = Array(...
Finding row index containing maximum value using R
...
3 Answers
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PHP function to make slug (URL string)
...
leoap
1,48833 gold badges2222 silver badges2929 bronze badges
answered Jun 2 '10 at 7:57
MaerlynMaerlyn
...
How does one use rescue in Ruby without the begin and end block
...
3
Also, class definitions, module definitions and (I think) do/end block literals form implicit exception blocks.
– Jör...
Python: access class property from string [duplicate]
... serv-inc
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answered Jul 22 '09 at 18:55
Alex MartelliAlex Martelli
72...
Compiling with cython and mingw produces gcc: error: unrecognized command line option '-mno-cygwin'
...gling to sort it.
– robintw
Mar 2 '13 at 13:45
@robintw yes I did. I posted a recipe at that moment (And I found it!)....
Why does changing the sum order returns a different result?
...nd then rounded to the nearest representable number. Here are two sums:
1/3 + 2/3 + 2/3 = (0.3333 + 0.6667) + 0.6667
= 1.000 + 0.6667 (no rounding needed!)
= 1.667 (where 1.6667 is rounded to 1.667)
2/3 + 2/3 + 1/3 = (0.6667 + 0.6667) + 0.3333
= 1.33...
Retrieving parameters from a URL
...lparse.urlparse(url)
print urlparse.parse_qs(parsed.query)['def']
Python 3:
import urllib.parse as urlparse
from urllib.parse import parse_qs
url = 'http://foo.appspot.com/abc?def=ghi'
parsed = urlparse.urlparse(url)
print(parse_qs(parsed.query)['def'])
parse_qs returns a list of values, so the...
How to draw border around a UILabel?
...yer.borderColor = [UIColor greenColor].CGColor
myLabel.layer.borderWidth = 3.0
Swift 5:
myLabel.layer.borderColor = UIColor.darkGray.cgColor
myLabel.layer.borderWidth = 3.0
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