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How to convert an integer to a string in any base?
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edited Aug 20 '18 at 19:38
user2357112 supports Monica
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Perform an action in every sub-directory using Bash
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answered Oct 22 '10 at 20:29
Mike ClarkMike Clark
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Bash, no-arguments warning, and case decisions
...shell?
– Open the way
Mar 11 '10 at 20:04
You mean the errors coming out of a particular program you're calling? You c...
What does a double * (splat) operator do
...a, b, c]
end
Here's a demo:
> foo 10
=> [10, [], {}]
> foo 10, 20, 30
=> [10, [20, 30], {}]
> foo 10, 20, 30, d: 40, e: 50
=> [10, [20, 30], {:d=>40, :e=>50}]
> foo 10, d: 40, e: 50
=> [10, [], {:d=>40, :e=>50}]
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What's the main difference between int.Parse() and Convert.ToInt32
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edited Jun 20 at 9:12
Community♦
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answered Oct 13 '08 at 23:53
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What does the -ObjC linker flag do?
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answered Jul 8 '11 at 20:18
sergiosergio
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Expand a random range from 1–5 to 1–7
...1, 2, 3, 4, 5). Therefore rand5() * 5 can only have the values (5, 10, 15, 20, 25), which is not the same as a complete range (1...25). If it did, subtracting 4 would make it (-3...21), but in this case it becomes (1, 6, 11, 16, 21), so the end points are correct but there are four big holes: (2..5)...
How to map and remove nil values in Ruby
... 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 of the...
Regex Email validation
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AlexAlex
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