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List comprehension in Ruby
...k.nil?
self.collect(&block).compact
end
end
some_array = [1, 2, 3, 4, 5, 6]
new_array = some_array.comprehend {|x| x * 3 if x % 2 == 0}
puts new_array
Prints:
6
12
18
I would probably just do it the way you did though.
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What is the difference between pluck and collect in Rails?
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231
pluck is on the db level. It will only query the particular field. See this.
When you do:
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how to ignore namespaces with XPath
...irk Vollmar
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9
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Check whether a path is valid
...elative.
– Dan Gøran Lunde
Feb 9 '13 at 10:38
1
Even with UriKind as Relative or AbsoluteOrRelat...
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Print list without brackets in a single row
...nstead.
– Anonymous
Dec 1 '19 at 9:43
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How to get a substring of text?
I have text with length ~700. How do I get only ~30 of its first characters?
5 Answers
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