Array#select!():select!()是一個Array類方法,該方法返回給定的塊,該塊從self中傳入連續的元素,並刪除該塊為其返回假值的元素。
用法:Array.select!()
參數:數組
返回:給定的塊從self傳遞連續的元素,刪除該塊為其返回假值的元素。
範例1:
# Ruby code for select!() method
# declaring array
a = [18, 22, 33, 3, 5, 6]
# declaring array
b = [1, 4, 1, 1, 88, 9]
# declaring array
c = [18, 22, 3, 3, 50, 6]
# select!
puts "select! method:#{a.select! {|num| num > 10 }}\n\n"
# select!
puts "select! method:#{b.select! {|x| x.odd? }}\n\n"
輸出:
select! method:[18, 22, 33] select! method:[1, 1, 1, 9]
範例2:
# Ruby code for select!() method
# declaring array
a = [18, 22, 33, 3, 5, 6]
# declaring array
b = [1, 4, 1, 1, 88, 9]
# declaring array
c = [18, 22, 3, 3, 53, 6]
# select!
puts "select! method:#{c.select! {|num| num > 10 }}\n\n"
# select!
puts "select! method:#{c.select! {|num| num.even? }}\n\n"
輸出:
select! method:[18, 22, 53] select! method:[18, 22]
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