AtMost check if n is valid uint64 value between min and max.

Gravatar returns the gravatar url of the given email.

InSlice returns true if value is in slice.

ParseTag parse the string str, that represents a struct tag in his format than returns a map of tags present with their associated values.

ReverseSlice reverse slice if slice is of type reflect.Slice or reflrect.Ptr (to silce) panics if slice type is different.

UpperFirst returns a copy of the s string, with the first letter capitalized.