Hash#select!()是一個Hash類方法,它根據塊條件檢查是否存在來自哈希函數的數組。
用法:Hash.select!()
參數:散列值
封鎖條件
返回:基於塊條件存在來自哈希的數組,否則返回false
範例1:
# Ruby code for Hash.select!() method
# declaring Hash value
a = { "a" => 100, "b" => 200 }
# declaring Hash value
b = {"a" => 100}
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
# select! Value
puts "Hash a select! form:#{a.select! {|key, value| key < "b"}}\n\n"
輸出:
Hash a select! form:{"a"=>100}
範例2:
# Ruby code for Hash.select!() method
# declaring Hash value
b = {"a" => 100}
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
# select! Value
puts "Hash b select! form:#{b.select!{|key, value| value < 200}}\n\n"
puts "Hash c select! form:#{c.select!{|key, value| key < "b"}}\n\n"
輸出:
Hash b select! form: Hash c select! form:{"a"=>100}
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注:本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Ruby | Hash select!() method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。