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ruBy => 操作符是什么意思

ruby的String类有一个方法叫chomp,用来去掉字符串末尾的\n或\r 例子这样 "hello".chomp #=> "hello" "hello\n".chomp #=> "hello" "hello\r\n".chomp #=> "hello" "hello\n\r".chomp #=> "hello\n" "hello\r".chomp #=> "hello"

晕,=> 这个符号表示运行结果,我是吧结果告诉你。注释一下就可以咯 cattle = "yahoo" p container = [cattle, cattle] cattle[2] = "p" p cattle[2] cattle[2]="p" # => cattle = yapoo puts cattle[2] # => p +++++++++++++++++++++++++++++ ...

$dev = {:slot => [],:boardtype => [],:registerstat => []}$dev[:slot] =1$dev[:boardtype] = 'F48TA'$dev[:registerstat] = 'Regisered'def check_device_info(a_hash)a_hash.each{|k,v|if !$dev.has_key?(k.downcase)return falseendif $dev...

是Ruby, 还是Rails? 如果是在 Rails 里,直接在Action中写,比如: def hello redirect_to :action => "index" end def hello redirect_to 'http://baidu.com' end

完全没有明白你的意思。 a = []a 1}a 2} # [{"one"=>1}, {"two"=>2}]a[1]["two"] = 3 # [{"one"=>1}, {"two"=>3}] 如上,改变了第二个元素的值,第一个元素并没有变。

没错,类也是对象 irb(main):001:0> String.class => Class irb(main):002:0> Class.class => Class irb(main):003:0> Class.superclass => Module irb(main):004:0>

ruby需要用while吗? irb(main):001:0> a=[1,2,5,3,9,0,9] => [1, 2, 5, 3, 9, 0, 9] irb(main):002:0> a-[2] => [1, 5, 3, 9, 0, 9] irb(main):004:0> a => [1, 2, 5, 3, 9, 0, 9] irb(main):005:0> a-[4] => [1, 2, 5, 3, 9, 0, 9]

你写的不是散列表 是数组 hashtest={'a'=>'c','b'=>'d','c'=>'e','d'=>'f'}才对

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