大约有 48,000 项符合查询结果（耗时：0.0509秒） [XML]
How do I create an average from a Ruby array?
...
Try this:
arr = [5, 6, 7, 8]
arr.inject{ |sum, el| sum + el }.to_f / arr.size
=> 6.5
Note the .to_f, which you'll want for avoiding any problems from integer division. You can also do:
arr = [5, 6, 7, 8]
arr.inject(0.0) { |sum, el| sum ...
Check if list contains any of another list
...
BrokenGlassBrokenGlass
145k2626 gold badges263263 silver badges313313 bronze badges
...
XML schema or DTD for logback.xml?
...|
edited Jul 4 '17 at 10:25
answered Dec 24 '12 at 20:37
Se...
Linux bash: Multiple variable assignment
...
5 Answers
5
Active
...
Django “login() takes exactly 1 argument (2 given)” error
...
answered Jul 15 '09 at 22:32
sthsth
190k4848 gold badges258258 silver badges349349 bronze badges
...
cout is not a member of std
...
answered Jul 7 '12 at 14:45
unkulunkuluunkulunkulu
10.1k22 gold badges2626 silver badges4646 bronze badges
...
bower automatically update bower.json
...
answered Aug 24 '13 at 11:53
grugru
4,41311 gold badge1616 silver badges2121 bronze badges
...
ggplot2 legend to bottom and horizontal
...
Tyler Rinker
94.9k5555 gold badges282282 silver badges464464 bronze badges
answered Apr 5 '12 at 17:09
Shreyas KarnikSh...
Rails: convert UTC DateTime to another time zone
...ork?
– Drew Johnson
Apr 23 '10 at 2:59
Which version of Rails are you using? Does it work if you do Time.zone.now.in_t...
How to assign an exec result to a sql variable?
...
5 Answers
5
Active
...