如何在 PHP 中编写速记设置器？

发布于 2024-12-28 19:47:32 字数 345 浏览 3 评论 0 原文

我很好奇有没有办法用 PHP 编写速记设置器。我编写代码时的首要任务是使其尽可能紧凑，我认为以下内容有点麻烦：

$value = "Which array do I go in?";
if(true)
    $arr_1[] = $value;
else
    $arr_2[] = $value;

有更好的方法来编写它吗？我尝试使用简写 if:

(true)?$arr_1[]:$arr_2[] = "Which array do I go in?";

但这似乎不起作用。对于这种情况，有人有什么很酷的技巧吗？

谢谢！

原文

I'm curious is there a way to write a shorthand setter in PHP. My primary quest when writing code is to make it as tight as possible and I think the following is kind of cumbersome:

$value = "Which array do I go in?";
if(true)
    $arr_1[] = $value;
else
    $arr_2[] = $value;

Is there a better way to write that? I tried to use the shorthand if:

(true)?$arr_1[]:$arr_2[] = "Which array do I go in?";

But that doesn't seem to work. Anyone have any cool tricks for this type of situation?

Thanks!

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乱了心跳 2025-01-04 19:47:32

对于您想要做的事情没有简写。您还应该意识到，使代码“尽可能紧凑”通常是以牺牲可读性为代价的。

编辑：有一些丑陋的黑客可以做你想做的事，但我强烈建议不要这样做。例如：

$GLOBALS[cond ? 'varname1' : 'varname2'] = $value;

There is no shorthand for what you are trying to do. Also you should realize that making code "as tight as possible" often comes at the cost of readability.

EDIT: There is some ugly hacks to do what you want, but I would strongly recommend against. E.g.:

$GLOBALS[cond ? 'varname1' : 'varname2'] = $value;

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可爱暴击 2025-01-04 19:47:32

另一个黑客是：

$arr = ($cond ? &$arr_1 : &$arr_2);
$arr[] = 'Which array do I go in';

它有两行，但不需要全局并且可以在函数中工作。然而，为了可读性，使用 if 语句可能更好。（注意：&正在引用变量，这就是它起作用的原因）。另一个（这可能会让您了解三元运算符的工作原理）是：

$cond ? $arr_1[] = $value : $arr_2[] = $value;

您看到三元运算符仅评估（运行代码路径）成功评估（在 ? 的右侧，如果为 true，则在的右侧：如果错误）。但是，如果您认为这比使用“if”更快，那么您错了，那么不太“严格”的代码实际上会执行更好。

Another hack would be:

$arr = ($cond ? &$arr_1 : &$arr_2);
$arr[] = 'Which array do I go in';

it's two lines but it doesn't require global and would work in a function. However for readability it is probably better to use an if statement. (Note: the & is making a reference to the variable, which is why this works). Another (which might make you understand HOW the ternary operator works) would be:

$cond ? $arr_1[] = $value : $arr_2[] = $value;

You see the ternary operator only evaluates (runs the code path) of the successful evaluation (on the right side of the ? if true, on the right side of : if false). However if you think this is faster than using 'if' you are wrong, your less 'tight' code will actually perform better.

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