reject to remove some elements from the hash
reject is opposite of
Elements that will meet the condition will be rejected.
Here we have a hash of people with their house number.
Our task is to find all the people who live in house whose house number is more than 500.
We can use
reject to do this job.
reject we can get a smaller part of the original hash.
All the elements that meet the criteria will be rejected.
In this case the criteria is the house number should 500 or less than 500.
It’s important to note that when
reject is used then
the “do end” block should return either
If the block returns
true then that key and value pair will
be rejected and if the block returns
false then that key and
value pair will be accepted.