Implementation of Array.nitems #3501

tbrand · 2016-11-04T16:25:39Z

I added Array.nitems function that is one of the important feature of Ruby's array.
Array.nitems returns the number of nil elements.

[0, 1, nil].nitems # => 1
[0, 2, 3].nitems # => 0

… Ruby's array. Array.nitems returns the number of nil elements. [0, 1, nil].nitems # => 1 [0, 2, 3].nitems # => 0

luislavena · 2016-11-04T16:50:48Z

Hello,

That can be simply expressed in Crystal using count:

puts [0, 1, nil].count &.nil? # => 1
puts [0, 2, 3].count &.nil?   # => 0

I suggest reimplement using existing enumerable functionality will be a better approach.

Also, nitems is not a very descriptive name and might not provide enough transparency on the purpose of it. Please note that while syntax is similar to Ruby, Crystal do not pursue be a 1-to-1 copy or compatible with it.

Cheers.

tbrand · 2016-11-04T16:57:59Z

Hi luislavena!

Thanks for your early reply!
I understood the philosophy of the Crystal lang.
I really agree with it and would like to use in many scenes :)
Anyway, close this PR.

I added Array.nitems function that is one of the important feature of…

2efeb0d

… Ruby's array. Array.nitems returns the number of nil elements. [0, 1, nil].nitems # => 1 [0, 2, 3].nitems # => 0

tbrand closed this Nov 4, 2016

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Implementation of Array.nitems #3501

Implementation of Array.nitems #3501

tbrand commented Nov 4, 2016 •

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luislavena commented Nov 4, 2016

tbrand commented Nov 4, 2016

Implementation of Array.nitems #3501

Implementation of Array.nitems #3501

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tbrand commented Nov 4, 2016

tbrand commented Nov 4, 2016 •

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