而（1）vs.（;;） [英] while (1) vs. for ( ;; )

问题描述

以下逻辑上相同的

语句之间是否有任何偏好？


而（1）{


vs.


for（;;）{


我怀疑答案是不但是我想知道共识是什么？
这样当我输入它时它就不再在我的脑海里眨眼了。


Mike

Should there be any preference between the following logically equivalent
statements?

while (1) {

vs.

for ( ;; ) {

I suspect the answer is "no" but I''d like to know what the consensus is
so that it doesn''t blink through my mind anymore when I type it.

Mike

推荐答案

你是对的。答案是不。他们都会做同样的事情。

You''re right. The answer is no. They''ll both do the exact same thing.

在文章< pa *************** *************@ioplex.com> ;,

Michael B Allen< mb ***** @ ioplex.com>写道：

In article <pa****************************@ioplex.com>,
Michael B Allen <mb*****@ioplex.com> wrote:

以下逻辑上等同的语句之间是否有任何偏好？
while（1）{
vs.
for（;;）{
我怀疑答案是否但是我想知道什么是共识
这样当我输入它时它就不再在我的脑海里眨眼了。

Should there be any preference between the following logically equivalent
statements? while (1) { vs. for ( ;; ) { I suspect the answer is "no" but I''d like to know what the consensus is
so that it doesn''t blink through my mind anymore when I type it.

Just我的意见，但我倾向于使用它们稍微不同的

上下文。


我倾向于使用while（1）当我循环播放某些东西时

将在不确定的未来时间发生，例如EOF或

警报信号。


我倾向于使用for（;;）当我在有限的时间内循环播放某些东西时会发生这种情况，但这对于通过循环控制变量表达的
表示不方便，例如迭代

a一组数据结构，直到检测到某个属性。


给它一个不同的倾斜：for（;;）传达迭代，而

而（1）传达重复这不一定是迭代的。


但是当两者最终相同时，选择金额不会超过人类的暗示读者。

-

Daylight是OSRAM SYLVANIA INC的商标。

Just my opinion, but I would tend to use them in slightly different
contexts.

I would tend to use while(1) when I was looping for something that
will occur at an indeterminate future time, such as EOF or an
alarm signal.

I would tend to use for(;;) when I was looping for something that
will occur within a bounded time, but which is inconvenient to
express through loop control variables, such as iterating through
a set of data structures until a certain property is detected.

To give it a different slant: for(;;) conveys "iteration", whereas
while(1) conveys "repetition" that is not necessarily iterative.

But as the two work out the same in the end, the choice amounts
to no more than a hint to a human reader.
--
Daylight is a trademark of OSRAM SYLVANIA INC.

风格问题，没有别的。

就个人而言，我倾向于''换（;;）''，但这只是我的风格。


它是'比如询问哪个更好：


if（）{

}


或：


如果（）

{

}


我出于各种原因专门使用第二种形式，但这是事情

的风格。不要改变代码。

Question of style, nothing else.
Personally, I tend to prefer ''for (;;)'', but that''s just my style.

It''s like asking which is better:

if () {
}

or:

if ()
{
}

I use the second form exclusively for various reasons, but it''s a matter
of style. Doesn''t change the code one bit.

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