Allow optional block with Hash#delete #3856
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bmulvihill
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Sija
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| # Deletes the key-value pair and returns the value, else `nil`. |
bmulvihill
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lbguilherme
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| a.delete(3) { found = false } | ||
| found.should be_false | ||
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| end |
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Should also spec that the value of the block is returned. And that the method still finds a value if it exists.
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Should |
bmulvihill
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@lbguilherme It should return nil. I switched the implementation so it will only yield if the key is not found, so it now return nil, same as Ruby. I also added 2 more specs as requested |
Sija
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Jan 8, 2017
| a.delete(1).should eq(2) | ||
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| it "executes block if key is not found" do |
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I'd test here case when found key has a nil value, like in { 3 => nil }.delete(3) { 7 }.should be_nil
bmulvihill
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@bmulvihill Thank you! |
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In Ruby we can pass an optional block to Hash#delete whose result can be returned if a key is not found.
This adds similar functionality to Crystal's Hash#delete.
Thanks!