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Inserting image into IPython notebook markdown
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edited May 28 '14 at 11:45
Pierre H.
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How do you test functions and closures for equality?
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answered Sep 5 '14 at 21:15
drewagdrewag
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iPhone and OpenCV
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Rui MarquesRui Marques
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Was PreferenceFragment intentionally excluded from the compatibility package?
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answered Mar 31 '11 at 14:41
CommonsWareCommonsWare
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Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
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edited Feb 6 '14 at 0:46
Adrian Macneil
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How to get my IP address programmatically on iOS/macOS?
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How can I query the networking subsystem to find out what my IPv4 (and IPv6) addresses are?
10 Answers
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Regular expression to match URLs in Java
... Alan Moore
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answered Oct 2 '08 at 16:48
TomCTomC
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How do you normalize a file path in Bash?
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Inigo
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answered Nov 12 '08 at 17:20
Kent FredricKent Fredric
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Is there any way to check if iOS app is in background?
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William Denniss
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answered Apr 29 '11 at 18:24
DavidNDavidN
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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...