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Python lambda with if but without else

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问题 I was writing some lambda functions and couldn't figure this out. Is there a way to have something like lambda x: x if (x<3) in python? As lambda a,b: a if (a > b) else b works ok. So far lambda x: x < 3 and x or None seems to be the closest i have found. 回答1: A lambda, like any function, must have a return value. lambda x: x if (x<3) does not work because it does not specify what to return if not x<3 . By default functions return None , so you could do lambda x: x if (x<3) else None But

Math.Max vs inline if - what are the differences?

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问题 I was working on a project today, and found myself using Math.Max in several places and inline if statements in other places. So, I was wondering if anybody knew which is "better"... or rather, what the real differences are. For example, in the following, c1 = c2 : Random rand = new Random(); int a = rand.next(0,10000); int b = rand.next(0,10000); int c1 = Math.Max(a, b); int c2 = a>b ? a : b; I'm asking specifically about C#, but I suppose the answer could be different in different languages

Math.Max vs inline if - what are the differences?

阅读更多关于 Math.Max vs inline if - what are the differences?

I was working on a project today, and found myself using Math.Max in several places and inline if statements in other places. So, I was wondering if anybody knew which is "better"... or rather, what the real differences are. For example, in the following, c1 = c2 : Random rand = new Random(); int a = rand.next(0,10000); int b = rand.next(0,10000); int c1 = Math.Max(a, b); int c2 = a>b ? a : b; I'm asking specifically about C#, but I suppose the answer could be different in different languages, though I'm not sure which ones have similar concepts. One of the major differences I would notice

If and Inline if, what are the advantages and disadvantages?

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I'm a little curious about the difference between if and inline if, in Python. Which one is better? Is there any reason to use inline if , other than the fact that it's shorter? Also, is there anything wrong with this statement? I'm getting a syntax error: SyntaxError: can't assign to conditional expression a = a*2 if b == 2 else a = a/w The advantage of the inline if expression is that it's an expression, which means you can use it inside other expressions—list comprehensions, lambda functions, etc. The disadvantage of the inline if expression is also that it's an expression, which means you

If and Inline if, what are the advantages and disadvantages?

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问题 I'm a little curious about the difference between if and inline if, in Python. Which one is better? Is there any reason to use inline if , other than the fact that it's shorter? Also, is there anything wrong with this statement? I'm getting a syntax error: SyntaxError: can't assign to conditional expression a = a*2 if b == 2 else a = a/w 回答1: The advantage of the inline if expression is that it's an expression, which means you can use it inside other expressions—list comprehensions, lambda