How to Iterate Over Values in a Map in Ruby - Step by Step Examples

How to Iterate Over Values in a Map in Ruby ?

Answer

To iterate over values in a hash in Ruby, you can use the each_value method or a for loop. This allows you to access each value in the hash.

✐ Examples

1 Iterating Over Values Using each_value Method

We can iterate over values in a hash in Ruby using the each_value method, which provides a convenient syntax for iterating over all values in the hash.

For example,

We start by declaring and initializing a hash named my_map with some key-value pairs. In this example, the hash has string keys and integer values.
We use the each_value method to iterate over the values in the hash.
In the block passed to each_value, we access each value.
We print each value to the console using the puts function to verify that we are iterating over all values.

Ruby Program

my_map = {
    'one' => 1,
    'two' => 2,
    'three' => 3
}

# Iterate over values using each_value method
my_map.each_value do |value|
  puts value
end

Output

1
2
3

2 Iterating Over Values Using for Loop

We can iterate over values in a hash in Ruby using a for loop with the values method, which provides a flexible way to access each value in the hash.

For example,

We start by declaring and initializing a hash named my_map with some key-value pairs. In this example, the hash has string keys and integer values.
We use the values method to get an array of the values in the hash.
We iterate over the values using a for loop, accessing each value directly from the array.
We print each value to the console using the puts function to verify that we are iterating over all values.

Ruby Program

my_map = {
    'one' => 1,
    'two' => 2,
    'three' => 3
}

# Iterate over values using for loop
for value in my_map.values do
  puts value
end

Output

1
2
3

3 Storing and Iterating Over Values Separately

We can store values in a separate array and then iterate over the array in Ruby, which provides a way to work with values independently of their keys.

For example,

We start by declaring and initializing a hash named my_map with some key-value pairs. In this example, the hash has string keys and integer values.
We declare an array named values to store the values from the hash.
We use the values method to get an array of the values in the hash and store it in the values array.
We use a for loop to iterate over the values array and print each value to the console using the puts function to verify that we have stored all values separately.

Ruby Program

my_map = {
    'one' => 1,
    'two' => 2,
    'three' => 3
}

# Store values in a separate array
values = my_map.values

# Iterate over the values array
for value in values do
  puts value
end

Output

1
2
3

Summary

In this tutorial, we learned How to Iterate Over Values in a Map in Ruby language with well detailed examples.

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How to Iterate Over Values in a Map in Ruby - Step by Step Examples