method
reject
v1_9_3_125 -
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- Class:
Array
reject()public
Returns a new array containing the items in self for which the block is not true. See also Array#delete_if
If no block is given, an enumerator is returned instead.
2Notes
Usage example
Some examples:
Remove even numbers
(1..30).reject { |n| n % 2 == 0 }
=> [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29]
Remove years dividable with 4 (this is not the full leap years rule)
(1950..2000).reject { |y| y % 4 != 0 }
=> [1952, 1956, 1960, 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000]
Remove users with karma below arithmetic mean
total = users.inject(0) { |total, user| total += user.karma } mean = total / users.size good_users = users.reject { |u| u.karma < mean }
see also
Enumerable#reject