大约有 47,000 项符合查询结果（耗时：0.0813秒） [XML]
How to map and remove nil values in Ruby
...s = [1, 2, 5, 8, 10, 13]
enum.filter_map { |i| i * 2 if i.even? }
# => [4, 16, 20]
In your case, as the block evaluates to falsey, simply:
items.filter_map { |x| process_x url }
"Ruby 2.7 adds Enumerable#filter_map" is a good read on the subject, with some performance benchmarks against some...
Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
...ave shorthand equivalents and filtered them out from the results.
Problem 4 - removing prefixed properties
The number of properties in each rule was significantly lower after the previous operation, but I've found that I sill had a lot of -webkit- prefixed properties that I've never hear of (-webk...
How to ignore files/directories in TFS for avoiding them to go to central source repository?
...dianJaxidian
11.8k77 gold badges6666 silver badges114114 bronze badges
1
...
How to find a Java Memory Leak
...
answered Sep 2 '08 at 18:49
Dima MalenkoDima Malenko
2,70511 gold badge2323 silver badges2323 bronze badges
...
Why is the Android test runner reporting “Empty test suite”?
...
answered Jan 20 '13 at 12:42
lmaclmac
77466 silver badges33 bronze badges
...
How do I retrieve an HTML element's actual width and height?
...
14 Answers
14
Active
...
Redirect stdout to a file in Python?
...
418
If you want to do the redirection within the Python script, setting sys.stdout to a file objec...
Check whether user has a Chrome extension installed
...
46
I am sure there is a direct way (calling functions on your extension directly, or by using the ...
Convert Mercurial project to Git [duplicate]
...ave a look at this SO question.
If you're using Mercurial version below 4.6, adrihanu got your back:
As he stated in his comment: "In case you use Mercurial < 4.6 and you got "revsymbol not found" error. You need to update your Mercurial or downgrade fast-export by running git checkout tags/v...
Will code in a Finally statement fire if I return a value in a Try block?
...
Andrew RollingsAndrew Rollings
13.4k55 gold badges4848 silver badges5050 bronze badges
...