CODEWITHSUNDEEP
ruby
ekultek
ekultek

Reputation: 79

Hash with delete

Why does this:

elements = Hash.new()
elements[100] = "a"
elements[200] = "b"
elements[300] = "c"
elements[400] = "d"

print "Count: ", elements.count(), 

elements.delete(100)

print "Count: ", elements.count(),

return this:

Count: 4
Count: 3

I wonder why that wouldn't return anything except the value 100.

Upvotes: 3

Views: 79

Answers (1)

K M Rakibul Islam
K M Rakibul Islam

Reputation: 34328

This is working as expected.

You are printing the count for your elements hash which is 4 at the beginning, then you are deleing one element using: elements.delete(100) then printing the count again, which is 3 now.

See this way to understand what's going on with your elements hash:

elements = Hash.new()
elements[100] = "a"
elements[200] = "b"
elements[300] = "c"
elements[400] = "d"

puts "elements: #{elements.inspect}"
puts "Count: #{elements.count()}"
elements.delete(100)
puts "elements: #{elements.inspect}"
puts "Count: #{elements.count()}"

# > elements: {100=>"a", 200=>"b", 300=>"c", 400=>"d"}
# > Count: 4
# > elements: {200=>"b", 300=>"c", 400=>"d"}
# > Count: 3

Upvotes: 3

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