组合min（）和max（）的函数是否有“规范”名称？

I find that I frequently end up writing a function that I always call "clamp()", that is kind of a combination of min() and max(). Is there a standard, "canonical" name for this function?

我发现我经常最终编写一个我总称为“clamp()”的函数,这是min()和max()的组合。这个函数有一个标准的“规范”名称吗?

It always looks something like this:

它总是看起来像这样:

function clamp($val, $lower, $upper)
{
  if ($val < $lower)
    return $lower;
  else if ($val > $upper)
    return $upper;
  else
    return $val;
}

Or simply using built-in min() and max() functions:

或者只是使用内置的min()和max()函数:

function clamp($val, $lower, $upper)
{
  return max($lower, min($upper, $val));
}

Variations exist: You can also check for invalid input, where lower > upper, and either throw an exception or reverse the inputs. Or you can ignore order of the inputs and call it a median-of-three function, but that can be confusing.

存在变化:您还可以检查无效输入,其中lower> upper,并且抛出异常或反转输入。或者您可以忽略输入的顺序并将其称为三个中值函数,但这可能会令人困惑。

8 个解决方案

#1

clamp is a good name.

钳是个好名字。

Let us make it the standard.

让我们把它作为标准。

#2

In some languages you have the function limit

在某些语言中,您具有功能限制

num = limit(val, min, max)

num = limit(val,min,max)

#3

clip(val, lo, hi)

#4

We use pin here. Actually, we use pin for simple ranges and clamp for other stuff.

我们在这里使用pin。实际上,我们使用pin作为简单范围并使用其他东西钳位。

#5

I'd just go for a function name "rangeCheck"

我只想找一个函数名“rangeCheck”

#6

median

Because it generalizes to more values.

因为它推广到更多的价值观。

#7

What about bound?

绑定怎么样?

bound(min, val, max)

Or constrain?

constrain(val, min, max)

#8

What do you think of things like InRangeClosestTo(Number, RangeLowerBound, RangeUpperBound), or ClosestInRange(Number, LowerBoundOfRange, UpperBoundOfRange)? They mean 'Get me the element of the range closest to the number', as I hope is obvious.

您如何看待InRangeClosestTo(Number,RangeLowerBound,RangeUpperBound)或ClosestInRange(Number,LowerBoundOfRange,UpperBoundOfRange)等内容?他们的意思是“让我得到最接近数字的范围的元素”,我希望这很明显。

The concept is more precise than a Clamp that yeah has two sides but not much more, or a Limit or Bound that might not want to return anything if the number is not within the range,

这个概念比Clamp更准确,是因为它有两个但不是更多,或者一个限制或束缚,如果数量不在范围内,可能不想返回任何东西,

To me they are clearer then the rest I saw; although it can take a couple of seconds to understand them, you only need to reason about the name, and at most have a brief look at the comment for confirmation; and it's nice when you see how precise it is (it is precise, right?).

对我来说,他们比我看到的其他人更清楚;虽然理解它们可能需要几秒钟,但您只需要对该名称进行推理,最多只需简要查看注释即可确认;当你看到它有多精确时(它是精确的,对吧?)它很好。

You might only have doubts on whether the range is inclusive or not, but I think most people would correctly assume it's inclusive. Alternatively you might use InInclRangeClosestTo and InExclRangeClosestTo, althought I don't see a lot of uses for exclusive ranges.

你可能只怀疑范围是否具有包容性,但我认为大多数人会正确地认为它具有包容性。或者你可以使用InInclRangeClosestTo和InExclRangeClosestTo,虽然我没有看到很多用于独占范围。

Of course you should have an auto-completing IDE if you wanted to use them.

当然,如果你想使用它们,你应该有一个自动完成的IDE。

#1