你更喜欢“if (var)"吗?或“if (var != 0)"? [英] Do you prefer "if (var)" or "if (var != 0)"?

问题描述

几十年来，我一直在使用 C 派生语言进行编程.沿着这条线的某个地方，我决定不再想写:

I've been programming in C-derived languages for a couple of decades now. Somewhere along the line, I decided that I no longer wanted to write:

if (var)    // in C
if ($var)   # in Perl

当我的意思是:

if (var != 0)
if (defined $var and $var ne '')

我认为部分原因是我有一个强类型的大脑，在我看来，如果"需要一个布尔表达式.

I think part of it is that I have a strongly-typed brain and in my mind, "if" requires a boolean expression.

或者可能是因为我使用 Perl 太多，而 Perl 中的真假是一个雷区.

Or maybe it's because I use Perl so much and truth and falsehood in Perl is such a mine-field.

也许只是因为这些天，我主要是一名 Java 程序员.

Or maybe it's just because these days, I'm mainly a Java programmer.

您的偏好是什么?为什么?

What are your preferences and why?

推荐答案

我喜欢我的 if 在大声朗读时有意义:

I like my ifs to make sense when read aloud:

if (is_it_happening) ...
if (number_of_sheep != 0) ...
if (pointer_to_something != NULL) ...

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