map (function, iterable, ...) Â¶ Apply function to every item of iterable and return a list of the results. If additional iterable arguments are passed, function must take that many arguments and is applied to the items from all iterables in parallel.
The grey hair ârule of thumbâ is that by the age of 50, half of the population have lost the colour in 50% of their hair. When researchers tested this rule, they found that 74% of people aged between 45 and 65 had grey hair, with an average intensity of 27%.Generally, men have more grey hair than women.he grey hair ârule of thumbâ is that by the age of 50, half of the population have lost the colour in 50% of their hair. When researchers tested this rule, they found that 74% of people aged between 45 and 65 had grey hair, with an average intensity of 27%. Generally, men have more grey hair than women.
Gray hair is a sign of age, not wisdom.. Having gray hair is a common occurrence to almost everyone especially at the adulthood stage. Hair has a tendency to lose its natural colour with advancing age and turn grey, but premature greying is a morbid condition and it makes even the young look older. Graying of hair may occur to some people who have medical conditions, but this should not worry you if you do not have any illness.