To iterate over keys in a hash in Ruby, you can use the each_key method or a for loop. This allows you to access each key in the hash.
We can iterate over keys in a hash in Ruby using the each_key method, which provides a convenient syntax for iterating over all keys in the hash.
For example,
my_map
with some key-value pairs. In this example, the hash has string keys and integer values.each_key
method to iterate over the keys in the hash.each_key
, we access each key.puts
function to verify that we are iterating over all keys.my_map = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Iterate over keys using each_key method
my_map.each_key do |key|
puts key
end
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We can iterate over keys in a hash in Ruby using a for loop with the keys method, which provides a flexible way to access each key in the hash.
For example,
my_map
with some key-value pairs. In this example, the hash has string keys and integer values.keys
method to get an array of the keys in the hash.puts
function to verify that we are iterating over all keys.my_map = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Iterate over keys using for loop
for key in my_map.keys do
puts key
end
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We can store keys in a separate array and then iterate over the array in Ruby, which provides a way to work with keys independently of their values.
For example,
my_map
with some key-value pairs. In this example, the hash has string keys and integer values.keys
to store the keys from the hash.keys
method to get an array of the keys in the hash and store it in the keys
array.keys
array and print each key to the console using the puts
function to verify that we have stored all keys separately.my_map = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Store keys in a separate array
keys = my_map.keys
# Iterate over the keys array
for key in keys do
puts key
end
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In this tutorial, we learned How to Iterate Over Keys in a Map in Ruby language with well detailed examples.