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jQuery OR Selector?
I am wondering if there is a way to have "OR" logic in jQuery selectors. For example, I know an element is either a descendant of an element with class classA or classB, and I want to do something like elem.parents('.classA or .classB') . Does jQuery provide such functionality?
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Python's equivalent of && (logical-and) in an if-statement
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what should i do for this: if x=='n' and y =='a' or y=='b': <do something> Will it work !? @ChristopheD
– diffracteD
Apr 2 '15 at 15:35
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Difference between “or” and || in Ruby? [duplicate]
What's the difference between the or and || operators in Ruby? Or is it just preference?
8 Answers
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Window Features - 更多技术 - 清泛网 - 专注C/C++及内核技术
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Layered Windows
Message-Only Windows
Window Relationships
Foreground and Background Windows
Owned Windows
Z-Order
Window Show State
Active Window
Disabled Windows
Window Visibility
Minimized, Maximized, and Restored Windows
Window Size and Position
Default Size a...
Or versus OrElse
What's the difference between or and OrElse ?
8 Answers
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Python: most idiomatic way to convert None to empty string?
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I'm keeping the else, but thanks for the str(s) tip so multiple types can be handled. nice!
– Mark Harrison
Jul 1 '09 at 9:39
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How to test multiple variables against a value?
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You misunderstand how boolean expressions work; they don't work like an English sentence and guess that you are talking about the same comparison for all names here. You are looking for:
if x == 1 or y == 1 or z == 1:
x and y are otherwise evaluated on their own (F...
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.al
I just discovered a logical bug in my code which was causing all sorts of problems. I was inadvertently doing a bitwise AND instead of a logical AND .
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How to get the first element of the List or Set? [duplicate]
I'd like to know if I can get the first element of a list or set. Which method to use?
9 Answers
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How do I check if a column is empty or null in MySQL?
I have a column in a table which might contain null or empty values. How do I check if a column is empty or null in the rows present in a table?
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