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.
Caution: If your hair is gray or white, temporary hair color is not temporary: It will leave a permanent stain on your hair. Semi-Permanent Hair Color: Semi-permanent hair color is made for darkening or adding depth to the hair, not for lightening. It coats the hair much like a rinse, but some types do contain small amounts of peroxide (not enough to lighten the hair). You'll often find an activator inside a home semi-permanent color box, which makes your color darker. This is a good option for adding richness to your existing hair color and will last about four to eight weeks. Be careful applying this color all over.