Question

我正试图在斯特林特类型/类别中增加一种方法,在这种方法中,我可以从南盟的扼杀物中排除碎片。

String::getUrlParams = ->                        # line 1 
    false unless ( params = @.split( ? )[1] )    # line 2
    # ...

在 Chrome·科索尔,当我蓄意用无布卢拉的扼杀手段来形容这一方法时,我期望它只是回谎。

"http://dns.com/".getUrlParams();

但它通过一条线。 2. 结论

if I change line 2 to

   return false unless ( params = @.split( ? )[1] ) # line 2`

then it does return false and stops the function at line 2

Any idea why coffeescript isn t returning false and halts the function in the first version?

Thank you

Answer 1

Coffeescript returns only the last function statement. If something follows some statement, that you want to return in middle of function, then you should do that explicitly.

--Short thoughts-- In short - Coffeescript compiler is not that smart, to predict, where you may want or may not want to return something. And same applies to most compilers now days. Also it s non-smartiness avoids most of mistakes, which would be caused because of premature return.

友情链接