最近CS毕业生的圈数和合规性 [英] Loops and compitency of recent CS grads
问题描述
因为我一直注意到的趋势而好奇。
在这里，大多数新生甚至是一些专业人士
拾取C ++或其他类似语言往往会产生低效的循环/迭代，例如：
array [0] = 0;
for（int i = 1; i< size; ++ i）
{
array [i] = i;
}
或我最喜欢的
for（int i = 0; i< 2 * size; ++ i）
{
if（i％2 == 0）
dofunct（array [i / 2]）;
else
dootherfunct（array [i / 2]）;
}
正确的迭代真的难以理解吗？
Just sort of curious because of a trend I''ve been noticing.
Around here, most of the newer students and even some professionals
that pick up C++ or another similar language tend to do inefficient
things with loops / iterations, such as:
array[0] = 0;
for (int i =1; i < size; ++i)
{
array[i] = i;
}
or my favorite
for (int i = 0; i < 2*size; ++i)
{
if (i % 2 == 0)
dofunct(array[i/2]);
else
dootherfunct(array[i/2]);
}
Is proper iteration really that hard of a concept to grasp?
推荐答案
这是能力 ;）
Josh Mcfarlane写道：
It''s "competency" ;)
Josh Mcfarlane wrote:
array [0] = 0;
for（int i = 1; i< size; + + i）
{
array [i] = i;
}
array[0] = 0;
for (int i =1; i < size; ++i)
{
array[i] = i;
}
我可能会在这里无能为力，但是这个
循环有什么问题？
干杯，
Andre
I may be outing myself as incompetent here, but what''s wrong with this
loop?
Cheers,
Andre
in*****@gmail.com 写道：
这是能力。 ;）
Josh Mcfarlane写道：
It''s "competency" ;)
Josh Mcfarlane wrote:
array [0] = 0;
for（int i = 1; i< size; ++ i）
{
array [i] = i;
}
array[0] = 0;
for (int i =1; i < size; ++i)
{
array[i] = i;
}
我可能会在这里无能为力，但这有什么不对br？>循环？
I may be outing myself as incompetent here, but what''s wrong with this
loop?
抱歉拼写错误。 = P
基本上，在这个例子中它可能具有误导性，但我看到代码
它们复制了初始值。
一个更好的例子可能是
array [0] + = x
for（int i = 1; i< size ; ++ i）
{
array [i] + = x;
}
或者需要在整个
迭代中执行的其他一些常见操作。对我来说，这是代码重复而且更麻烦的是
维护代码，其中初始迭代（0）在循环之外，
而剩余的迭代在里面。
Josh McFarlane
Sorry for the mispelling. =P
Basically, in this example it may have been misleading, but I see code
where they duplicate the initial value.
A better example may have been
array[0] += x
for (int i = 1; i < size; ++i)
{
array[i] += x;
}
Or some other common operation that needs to be performed on the entire
iteration. To me, it''s code duplication and more of a hassle to
maintain code where the initial iteration (0) is outside of the loop,
while the remaining iterations are inside.
Josh McFarlane
2005-10-28，在***** @ gmail.com < in ***** @ gmail.com>写道：
On 2005-10-28, in*****@gmail.com <in*****@gmail.com> wrote:
它是能力 ;）
Josh Mcfarlane写道：
It''s "competency" ;)
Josh Mcfarlane wrote:
array [0] = 0;
for（int i = 1; i< size; ++ i）
{
array [i] = i;
}
array[0] = 0;
for (int i =1; i < size; ++i)
{
array[i] = i;
}
我可能会在这里无能为力，但这有什么不对br />循环？
I may be outing myself as incompetent here, but what''s wrong with this
loop?
他可能希望它更具惯用性：
for（int i = 0; i < size; ++ i）
{
array [i] = i;
}
如果我要看原始代码，
for（int i = 1;
开头，小闹钟会开始在脑子里开始，
我不得不浪费时间证明自己没有错。
-
Neil Cerutti
He may wish it were the more idiomatic:
for (int i = 0; i < size; ++i)
{
array[i] = i;
}
If I were to see the original code, with
for (int i = 1;
at the beginning, little alarms would start going off in my head,
and I''d have to waste time proving to myself it wasn''t wrong.
--
Neil Cerutti
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