本文是小编为大家收集整理的关于"nil or zero "的最佳ruby成语的处理/解决方法，可以参考本文帮助大家快速定位并解决问题，中文翻译不准确的可切换到English标签页查看源文。
问题描述
我正在寻找一种简洁的方式来检查一个值，以查看它是零还是零.目前，我正在做类似:
的事情if (!val || val == 0) # Is nil or zero end
但这似乎很笨拙.
推荐答案
if val.nil? || val == 0 [do something] end
或仅需一个指令:
[do something] if val.nil? || val == 0
其他推荐答案
从Ruby 2.3.0开始，您可以将安全导航操作员(&.)与 Numeric#nonzero? . &.返回nil如果实例为nil和nonzero? - 如果数字为0:
unless val&.nonzero? # Is nil or zero end
或Postfix:
do_something unless val&.nonzero?
其他推荐答案
如果您真的喜欢结尾处有问号的方法名称:
if val.nil? || val.zero? # do stuff end
您的解决方案也可以，其他一些解决方案也可以.
Ruby可以让您寻找一种很好的方法来完成所有操作，如果您不小心.
问题描述
I am looking for a concise way to check a value to see if it is nil or zero. Currently I am doing something like:
if (!val || val == 0) # Is nil or zero end
But this seems very clumsy.
推荐答案
Objects have a nil? method.
if val.nil? || val == 0 [do something] end
Or, for just one instruction:
[do something] if val.nil? || val == 0
其他推荐答案
From Ruby 2.3.0 onward, you can combine the safe navigation operator (&.) with Numeric#nonzero?. &. returns nil if the instance was nil and nonzero? - if the number was 0:
unless val&.nonzero? # Is nil or zero end
Or postfix:
do_something unless val&.nonzero?
其他推荐答案
If you really like method names with question marks at the end:
if val.nil? || val.zero? # do stuff end
Your solution is fine, as are a few of the other solutions.
Ruby can make you search for a pretty way to do everything, if you're not careful.
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