大约有 47,000 项符合查询结果（耗时：0.0833秒） [XML]
How do I do top 1 in Oracle?
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261
If you want just a first selected row, you can:
select fname from MyTbl where rownum = 1
You ...
PHP Function with Optional Parameters
I've written a PHP function that can accepts 10 parameters, but only 2 are required. Sometimes, I want to define the eighth parameter, but I don't want to type in empty strings for each of the parameters until I reach the eighth.
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How to COUNT rows within EntityFramework without loading contents?
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124
Query syntax:
var count = (from o in context.MyContainer
where o.ID == '1'
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How to close Android application?
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140
Android has a mechanism in place to close an application safely per its documentation. In the...
python: How do I know what type of exception occurred?
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15 Answers
15
Active
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How can I detect when an Android application is running in the emulator?
...nning on the emulator than when running on a device. ( For example , using 10.0.2.2 instead of a public URL to run against a development server automatically.) What is the best way to detect when an Android application is running in the emulator?
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What is the correct syntax of ng-include?
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edited Mar 10 '15 at 11:04
matthias krull
4,19433 gold badges2929 silver badges5353 bronze badges
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What is the difference between D3 and jQuery?
...ate binding between selection and data
var binding = selection.data([50, 100, 150]);
// update existing nodes
binding
.style('width', function(d) { return d + 'px'; });
// create nodes for new data
binding.enter()
.append('div')
.style('width', function(d) { return d + 'px'; ...
Is Fortran easier to optimize than C for heavy calculations?
...*n; i++)
{
float x = input[i*2+0];
float y = input[i*2+1];
output[i*2+0] = matrix[0] * x + matrix[1] * y;
output[i*2+1] = matrix[2] * x + matrix[3] * y;
}
}
This function would run slower than the Fortran counterpart after optimization. Why so? If you write ...
Good examples using java.util.logging [closed]
... debugging basic flow issues:
LOGGER.log( Level.FINER, "processing[{0}]: {1}", new Object[]{ i, list.get(i) } );
Use the parameterized versions of the logging facilities to keep from generating tons of String concatenation garbage that GC will have to keep up with. Object[] as above is cheap, on ...