因此,Ruby对使用有时的薄膜(<>>)的宽松宽容,而不是要求使用,给我造成了混乱,因为Im试图学习铁路,以及何时/在何处使用,原因何在?
有时,参数或数值通过如下:(@user,@comment)
,而其他时间看来是[:user => comment]
,而其他则只是::action =>edit
。
www.un.org/Depts/DGACM/index_french.htm
这些规则是什么? 你们是否必须帮助你们记住?
因此,Ruby对使用有时的薄膜(<>>)的宽松宽容,而不是要求使用,给我造成了混乱,因为Im试图学习铁路,以及何时/在何处使用,原因何在?
有时,参数或数值通过如下:(@user,@comment)
,而其他时间看来是[:user => comment]
,而其他则只是::action =>edit
。
www.un.org/Depts/DGACM/index_french.htm
这些规则是什么? 你们是否必须帮助你们记住?
括号为:
a = 2 * (3 + 4)
b = (x==y) || (m==n)
Hash.new.send( []= , :a, :b)
Cur字面和区块(例如:
h = {1=>2, 2=>3}
h.each {|k,v| puts k+v}
薄膜(<>条/条码> 用于阵容、阵列索引和参赛,以及从散射中选取,例如:
arr = [1, 2, 3]
two = arr[1]
three = h[2]
为了混淆问题,只要是最后的论点,也就可把面字作为使用方法的论据,而无需治疗薄膜或母体。 此外,可在方括号内使用斜面字,以建立一个包含散面的单一项目阵列:
puts 1=>2, 3=>4 #=> 1234
[5=>6, 7=>8] #=> [{5=>6, 7=>8}]
在怀疑时,总是使用母子把物品组起来,并用粗略的镜子包 wrap。
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