条件语句出现在表达式之前还是之后有关系吗? [英] Does it matter if a conditional statement comes before or after the expression?

问题描述

对不起，如果这是一个愚蠢的问题，但我是一个 C# 家伙，在 ruby​​ 上摸索着.

Sorry if this is a stupid question but I'm a C# guy fumbling his way around ruby..

在 ruby​​ 中，我注意到很多人这样做:

in ruby i notice a lot of people do this:

do_something(with params) if 1 = 1

这和这个有什么区别(甚至是细微的):

is there any difference (even slight) between that and this:

if 1 = 1 do_something(with params)

还是为了更清晰而写的相同?

or is it the same thing written for better clarity?

推荐答案

它是语法糖...让我们以更容易阅读的方式编写代码.

It's syntactic sugar... allowing us to write code in a way that's easier to read.

http://rubylearning.com/satishtalim/ruby_syntactic_sugar.html

注意:对于@Phrogz，以下内容不一样！请确保您没有尝试将值分配给变量，而不是将变量与值进行比较！此外，正如 Phrogz 所提到的，变量赋值的顺序有很大的不同......有关详细信息，请参阅@Phrogz 答案！

Note: for @Phrogz, the following are NOT the same! Please make sure that you are not trying to assign a value to variable instead of comparing a variable to a value! Also, as Phrogz mentions, the order of variable assignment makes a big difference... see @Phrogz answer for mor details!

if 1 = 1 then do_something(with params) end
if 1 == 1 then do_something(with params) end

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