大约有 40,000 项符合查询结果（耗时：0.0707秒） [XML]
What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?
...ger problem on my hands. This throws a Reference Error too: <% alert('test'); %>
– Aashay Desai
Mar 21 '11 at 0:34
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Get selected value/text from Select on change
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function test(a) {
var x = (a.value || a.options[a.selectedIndex].value); //crossbrowser solution =)
alert(x);
}
<select onchange="test(this)" id="select_id">
<option value="0">-Select-</option>
...
Writing your own STL Container
...mp;, X<T,A>&); //optional
Also, whenever I make a container, I test with a class more or less like this:
#include <cassert>
struct verify;
class tester {
friend verify;
static int livecount;
const tester* self;
public:
tester() :self(this) {++livecount;}
tester...
Benchmarking (python vs. c++ using BLAS) and (numpy)
...enBLAS and MKL perform on the same level, with the exception of Eigenvalue test.
The Eigenvalue test performs only reasonably well on OpenBLAS in single threaded mode.
In multi-threaded mode the performance is worse.
The "Matrix size vs threads chart" also show that although MKL as well as OpenBL...
SQL to determine minimum sequential days of access?
...
Truncate the CreateionDate down to days in all these tests (on the right side only or you kill SARG) using DATEADD(dd, DATEDIFF(dd, 0, CreationDate), 0) This works by subtracting the supplied date from zero--which Microsoft SQL Server interprets as 1900-01-01 00:00:00 and gives...
What's the difference between the Dependency Injection and Service Locator patterns?
...One important result of this is that the DI example is much easier to unit test -- because you can pass it mock implementations of its dependent objects. You could combine the two -- and inject the service locator (or a factory), if you wanted.
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How can I apply a function to every row/column of a matrix in MATLAB?
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I would test performance of this approach for any particular case against simple for-loop, which might be faster then converting a matrix to cell array. Use tic/tac wrap to test.
– yuk
Feb 21 '1...
How do I copy items from list to list without foreach?
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For a list of elements
List<string> lstTest = new List<string>();
lstTest.Add("test1");
lstTest.Add("test2");
lstTest.Add("test3");
lstTest.Add("test4");
lstTest.Add("test5");
lstTest.Add("test6");
If you want to copy all the elements
List<string> ...
Difference between no-cache and must-revalidate
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With Jeffrey Fox's interpretation about no-cache, i've tested under chrome 52.0.2743.116 m, the result shows that no-cache has the same behavior as must-revalidate, they all will NOT use local cache when server is unreachable, and, they all will use cache while tap browser's Back...
MySQL error: key specification without a key length
... distinct indexed values and total number of rows. Here is one example for test table:
+-----+-----------+
| id | value |
+-----+-----------+
| 1 | abc |
| 2 | abd |
| 3 | adg |
+-----+-----------+
If we index only the first character (N=1), then index table will look...