如何通過方法調用參數時將參數傳遞給proc？ （紅寶石）

Question

proc = Proc.new do |name| 
    puts "Thank you #{name}!" 
end 
def thank 
    yield 
end 

---

proc.call # output nothing, just fine 
proc.call('God') # => Thank you God! 

thank &proC# output nothing, too. Fine; 
thank &proc('God') # Error! 
thank &proc.call('God') # Error! 
thank proc.call('God') # Error! 
# So, what should I do if I have to pass the 'God' to the proc and use the 'thank' method at the same time ? 

謝謝:)

Answer 1

我認爲最好的方法是：

def thank name 
    yield name if block_given? 
end 

Answer 2

def thank(arg, &block) 
    yield arg 
end 

proc = Proc.new do|name| 
    puts "Thank you #{name}" 
end 

然後，你可以這樣做：

thank("God", &proc) 

Answer 3

另一種方式：

proc = Proc.new do |name| 
    puts "thank you #{name}" 
end 

def thank(proc_argument, name) 
    proc_argument.call(name) 
end 

thank(proc, "God") #=> "thank you God" 
thank(proc, "Jesus") #=> "thank you Jesus" 

它的工作原理，但我不喜歡它。不過，它將幫助讀者理解如何使用特效和塊。