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Ruby Hash reject!用法及代码示例


Hash#reject!()是一种Hash类方法,它检查是否对哈希数组进行了任何更改。

用法:Hash.reject!()

参数:散列值


返回:true-如果进行更改,否则返回false

范例1:

# Ruby code for Hash.reject!() 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} 
  
  
# reject! Value 
puts "Hash a reject! form:#{a.reject! {|key, value| key < "b"}}\n\n"

输出:

Hash a reject! form:{"b"=>200}

范例2:

# Ruby code for Hash.reject!() method 
  
# declaring Hash value 
b = {"a" => 100} 
  
# declaring Hash value 
c = {"a" => 100, "c" => 300, "b" => 200} 
  
  
# reject! Value 
  
puts "Hash b reject! form:#{b.reject!{|key, value| value < 200}}\n\n"
  
puts "Hash c reject! form:#{c.reject!{|key, value| key < "b"}}\n\n"

输出:

Hash b reject! form:{}

Hash c reject! form:{"c"=>300, "b"=>200}



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注:本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 Ruby | Hash reject! method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。