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Max return value if empty query
...n an empty sequence results in an error.
– Raimund Krämer
Jan 29 '19 at 12:24
add a comment
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How/When does Execute Shell mark a build as failure in Jenkins?
...e said:
If you have a shell script that does "checkout, build, deploy" all by itself, then why are you using Jenkins? You are foregoing all the features of Jenkins that make it what it is. You might as well have a cron or an SVN post-commit hook call the script directly. Jenkins performing the S...
How do I sort a dictionary by value?
...(x.items(), key=operator.itemgetter(0))
In Python3 since unpacking is not allowed [1] we can use
x = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}
sorted_x = sorted(x.items(), key=lambda kv: kv[1])
If you want the output as a dict, you can use collections.OrderedDict:
import collections
sorted_dict = collection...
How to tell if a string is not defined in a Bash shell script
... not set, you can use:
if [ -z "${VAR+xxx}" ]; then echo VAR is not set at all; fi
if [ -z "$VAR" ] && [ "${VAR+xxx}" = "xxx" ]; then echo VAR is set but empty; fi
You probably can combine the two tests on the second line into one with:
if [ -z "$VAR" -a "${VAR+xxx}" = "xxx" ]; then echo VA...
How to remove items from a list while iterating?
...:] notation hackish or fuzzy, here's a more explicit alternative. Theoretically, it should perform the same with regards to space and time than the one-liners above.
temp = []
while somelist:
x = somelist.pop()
if not determine(x):
temp.append(x)
while temp:
somelist.append(temp...
Find mouse position relative to element
...t that you added the event listener to.
– Linus Unnebäck
Jul 31 '15 at 7:19
2
This seems to give...
Different between parseInt() and valueOf() in java?
... stackoverflow.com/questions/29633158/…
– Jean-François Savard
Jul 30 '15 at 19:57
...
Where does this come from: -*- coding: utf-8 -*-
... the text editor. Until now, I never knew that the python interpreter actually parsed the comment if it is present on the first two lines of the file.
– umeboshi
Dec 26 '14 at 3:08
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Is there a Unix utility to prepend timestamps to stdin?
... 2; STDOUT.flush; sleep 2; puts 3" | ts '%F %T'
– umläute
Jan 12 '17 at 15:04
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How do I disable right click on my web page?
... on my web page without using JavaScript? I ask this because most browsers allow user to disable JavaScript.
24 Answers
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