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Can I get JSON to load into an OrderedDict?
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619
Yes, you can. By specifying the object_pairs_hook argument to JSONDecoder. In fact, this is t...
How to round up a number in Javascript?
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316
/**
* @param num The number to round
* @param precision The number of decimal places to prese...
Extracting specific columns from a data frame
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10 Answers
10
Active
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Shell equality operators (=, ==, -eq)
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197
It's the other way around: = and == are for string comparisons, -eq is for numeric ones. -eq i...
Extract every nth element of a vector
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163
a <- 1:120
b <- a[seq(1, length(a), 6)]
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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！
...码：
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...
is it possible to select EXISTS directly as a bit?
... you'll have to use a workaround.
If you must return a conditional bit 0/1 another way is to:
SELECT CAST(
CASE WHEN EXISTS(SELECT * FROM theTable where theColumn like 'theValue%') THEN 1
ELSE 0
END
AS BIT)
Or without the cast:
SELECT
CASE
WHEN EXISTS( SELECT 1 FROM theTa...
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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Can I use multiple versions of jQuery on the same page?
... it's doable due to jQuery's noconflict mode. http://blog.nemikor.com/2009/10/03/using-multiple-versions-of-jquery/
<!-- load jQuery 1.1.3 -->
<script type="text/javascript" src="http://example.com/jquery-1.1.3.js"></script>
<script type="text/javascript">
var jQuery_1_1_3 =...