回复: Re: [refactoring] Why is 'else' demanded?

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=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A Steven Gordon=0D
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=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A refactoring=0D
=E4=B8=BB=E9=A2=98=EF=BC=9A Re: Re: [refactoring] Why is 'else' demanded?=
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Awkward code has much a greater cost of ownership.=0D
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On Thu, Jun 13, 2013 at 8:39 PM, Andrew Luo <[email protected]> wrote:=
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> **=0D
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> You don'tneed else,=0D
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> if evaluation=0D
> ...=0D
> else=0D
> ...=0D
>=0D
> is equivalent to=0D
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> istrue =3D evaluation=0D
>=0D
> if istrue=0D
> ....=0D
> if !istrue=0D
> ....=0D
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> but it's likely that this idiom was so common that people found it helpfu=
l=0D
> to have else to make things more succinct. Don't use it if you don't like=
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> it, but your code may become more awkward for others to read.=0D
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> - Andrew=0D
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> ________________________________=0D
> From: zhanghongliang <[email protected]>=0D
> To: refactoring <[email protected]>=0D
> Sent: Wednesday, June 12, 2013 8:39 PM=0D
> Subject: Re: Re: [refactoring] Why is 'else' demanded?=0D
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> May the explanation is forceful as below:=0D
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> refactoring starts with "structured programming" (the=0D
> paradigm shift in the 1980s where "if - go to" statements were replaced=
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> by "while", "repeat" and "if-then-else" statements in a lot of=0D
> languages). The return statement is not part of a structured program.=0D
>=0D
> the above drawn from the reply mail by Willem Bogaerts<[email protected]>=0D
>=0D
> Best regards,=0D
> ZhangHong-liang=0D
>=0D
> =E5=BC=A0=E7=BA=A2=E4=BA=AE=0D
>=0D
> M:18640223030=0D
> DL: 010=EF=BC=8D82870058=0D
> =E4=B8=8A=E6=B5=B7=E9=9B=B7=E8=85=BE=E8=BD=AF=E4=BB=B6=E6=9C=89=E9=99=90=
=E5=85=AC=E5=8F=B8 (ShangHai Raxtone Limited Company)=0D
> =E5=8C=97=E4=BA=AC=E5=B8=82=E6=B5=B7=E6=B7=80=E5=8C=BA=E4=B8=AD=E5=85=B3=
=E6=9D=91=E5=BD=A9=E5=92=8C=E5=9D=8A=E8=B7=AF11=E5=8F=B7=E5=8D=8E=E4=B8=80=
=E6=8E=A7=E8=82=A1=E5=A4=A7=E5=8E=A6201=E5=AE=A4 (Room 201, Buliding HuaYi =
control, No.11,=0D
> CaiHeFang Road, Beijing , China)=0D
> Fax:82870098=0D
>=0D
> From: Carfield Yim=0D
> Date: 2013-06-10 23:34=0D
> To: refactoring=0D
> Subject: Re: [refactoring] Why is 'else' demanded?=0D
>=0D
> I think one reason is C have if-else and quite a number of languages base=
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> on C.=0D
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> On Mon, Jun 10, 2013 at 3:02 AM, =E5=BC=A0=E7=BA=A2=E4=BA=AE <zhanghongli=
[email protected]> wrote:=0D
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> > I have a problem. Why is there always else key word in a language? Sinc=
e=0D
> I=0D
> > can use return to stop the process of a flow. I hate to see else=0D
> statement=0D
> > and I see I can never use else statement that only increase the=0D
> complexity=0D
> > of program.=0D
> >=0D
> > A if statement stands for a condition that should be unique, and it=0D
> should=0D
> > has no relation with anything else. So a language does not need else an=
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> it=0D
> > should not appear in a program.=0D
> >=0D
> > Sent from my iPad=0D
> >=0D
> >=0D
> > ------------------------------------=0D
> >=0D
> > Yahoo! Groups Links=0D
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