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[英]JavaScript: difference between typeof(var)==='undefined' vs =='undefined'?
[英]What's the difference between `if var in` and `if var contains`?
AutoHotkey文档列出了两种将变量与列表中的项目进行比较的方法。
如果匹配列表中的 Var
如果Var包含MatchList
if var in
和if var contains
之间if var in
什么区别?
希望有一些例子可以证明这一区别。
if var in MatchList
的if var in MatchList
示例:
比赛:
F3::
example := "pizza" ; Contains a matching string.
if example in This,is,a,tasty,pizza
MsgBox, %example% found in MatchList
负匹配:
F3::
example := "pizz" ; Contains no matching string.
if example not in This,is,a,tasty,pizza
MsgBox, %example% not found in MatchList
if var contains MatchList
示例:
比赛:
F3::
example := "ice" ; Contains a matching "i" substring.
if example contains p,i,z,z,a
MsgBox, %example% contains MatchList item(s)
负匹配:
F3::
example := "doggy" ; Contains no matching substring.
if example not contains p,i,z,z,a
MsgBox, %example% does not contain MatchList item(s)
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