Re: Why is 'else' demanded?

You are right, I am bigoted too much. I also meant it is some harder to tra=
nsform all conditional statements into a direct flow. I spent a lot of time=
 transforming so I am confused to do that. It is better to do that when nec=
essary, I.e.=20
Replace Nested Conditional with Guard Clauses
It is listed a refactor method in Martin Fowler's book.

Thank your reply. I learn a lot from your answer.

Best regards.

=E5=BC=A0=E7=BA=A2=E4=BA=AE  ZhangHong-liang

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On 2013-6-10, at 4:07, Steven Gordon <[email protected]> wrote:

> Sometimes, you want to continue with the next piece of logic after either
> condition in the if ... else ..., but a return would skip the remainder o=
f
> the function.
>=20
> Do you also object to case statements, since we can always accomplish the
> same logic with just ifs and returns?
>=20
> If the criteria for a language is that there always be exactly one way to
> express anything, then we would end up with a language in which it is
> difficult to express many common constructs. We might end up writing
> programs using turing machines or assembly language.
>=20
> That said, one of my projects over the last several years has utilized a
> language with no "else": Prolog. I do not miss it at all in Prolog.
>=20
> On Sun, Jun 9, 2013 at 12:02 PM, =E5=BC=A0=E7=BA=A2=E4=BA=AE <zhanghongli=
[email protected]> wrote:
>=20
> > **
> >
> >
> > I have a problem. Why is there always else key word in a language? Sinc=
e I
> > can use return to stop the process of a flow. I hate to see else statem=
ent
> > and I see I can never use else statement that only increase the complex=
ity
> > of program.
> >
> > A if statement stands for a condition that should be unique, and it sho=
uld
> > has no relation with anything else. So a language does not need else an=
d it
> > should not appear in a program.
> >
> > Sent from my iPad
> >=20
> >
>=20
> [Non-text portions of this message have been removed]
>=20
>=20


[Non-text portions of this message have been removed]



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