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C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区，为创新赋能！
...下代码：
int main(int argc, char** argv)
{
int a[5] = {1,2,3,4,5};
int* ptr = (int*)(&a + 1);
printf("%d,%d\n", *(a+1), *(ptr-1));
return 0;
}这道题在很多所谓经典C语言面试题里是常见的不能再常见，你...
Data structure: insert, remove, contains, get random element, all at O(1)
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14 Answers
14
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Fastest check if row exists in PostgreSQL
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Use the EXISTS key word for TRUE / FALSE return:
select exists(select 1 from contact where id=12)
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How to deep copy a list?
...bitrary Python objects.
See the following snippet -
>>> a = [[1, 2, 3], [4, 5, 6]]
>>> b = list(a)
>>> a
[[1, 2, 3], [4, 5, 6]]
>>> b
[[1, 2, 3], [4, 5, 6]]
>>> a[0][1] = 10
>>> a
[[1, 10, 3], [4, 5, 6]]
>>> b # b changes too ->...
Remove characters after specific character in string, then remove substring?
...");
if (index > 0)
input = input.Substring(0, index); // or index + 1 to keep slash
Alternately, since you're working with a URL, you can do something with it like this code
System.Uri uri = new Uri("http://www.somesite.com/what/test.aspx?hello=1");
string fixedUri = uri.AbsoluteUri.Repla...
How to join multiple lines of file names into one with custom delimiter?
I would like to join the result of ls -1 into one line and delimit it with whatever i want.
22 Answers
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Print second last column/field in awk
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awk '{print $(NF-1)}'
Should work
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What is the difference between bottom-up and top-down?
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251
rev4: A very eloquent comment by user Sammaron has noted that, perhaps, this answer previousl...