Ruby | Enumerable each_with_index() function
The each_with_index() of enumerable is an inbuilt method in Ruby hashes the items in the enumerable according to the given block. In case no block is given, then an enumerator is returned.
Syntax: enu.each_with_index { |obj| block }
Parameters: The function takes the block which is used to initialise the index to the individual objects.
Return Value: It returns the enumerator, if no block is given, else it hashes the items.
Example 1:
# Ruby program for each_with_index method in Enumerable # Initialize hashing = Hash . new enu = [ 7 , 9 , 10 ] enu.each_with_index { |item, index| hashing[item] = index } # prints hash puts hashing |
Output:
{7=>0, 9=>1, 10=>2}
Example 2:
# Ruby program for each_with_index method in Enumerable # Initialize hashing = Hash . new enu = [ 7 , 9 , 10 ] enu.each_with_index |
Output:
Enumerator: [7, 9, 10]:each_with_index
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