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How can we get the length of a hash in Ruby
okwudili onyejiaku
Overview
We can use the length property to find the length of a Hash in Ruby.
Syntax
hash.length
Return value
This method returns the count of entries in the hash.
Code example
# create some hashes
h1 = {one: 1, two: 2, three: 3}
h2 = {name: "okwudili", stack: "ruby"}
h3 = {"foo": 0, "bar": 1}
h4 = {M:"Mango", A: "Apple", B: "Banana"}
h5 = {}
# get the length of
# hashes and print results
puts h1.length # 3
puts h2.length # 2
puts h3.length # 2
puts h4.length # 3
puts h5.length # 0Get the length of a hash in Ruby
Code explanation
- Lines 2–6: We create some Hashes —
h1,h2,h3,h4, andh5. - Lines 9–13: We find the length of each
hash, using thelengthproperty. Then, we print the results to the console.
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okwudili onyejiaku
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