大约有 15,461 项符合查询结果（耗时：0.0330秒） [XML]
How to check if a table exists in a given schema
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It depends on what you want to test exactly.
Information schema?
To find "whether the table exists" (no matter who's asking), querying the information schema (information_schema.tables) is incorrect, strictly speaking, because (per documentation):
On...
Execute script after specific delay using JavaScript
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Of course it is CPU intensive, but for quick and dirty testing it works
– Maris B.
Mar 25 '15 at 9:21
3
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In Python, how do I index a list with another list?
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A quick timing test (no pysco or anything, so make of it what you will) showed the list comprehension 2.5x faster than the loop (1000 elements, repeated 10000 times).
– James Hopkin
Jun 18 '09 at 12:00...
How to remove convexity defects in a Sudoku square?
...sudoku board stands straight, otherwise height/width (or vice versa) ratio test will most probably fail and you will not be able to detect edges of sudoku. (I also want to add that if lines that are not perpendicular to the image borders, sobel operations (dx and dy) will still work as lines will st...
Ignore python multiple return value
... It doesn't call the function multiple times: >>> def test(): ... print "here" ... return 1,2,3 ... >>> a,b = test()[:2] here [edit: sorry that code didn't come through, aparently you only get one line in comments. For those not familiar >>> and ... a...
How to launch jQuery Fancybox on page load?
...onload demos of Fancybox 2.0:
$(window).load(function()
{
$.fancybox("test");
});
Bare in mind you may be using document.ready() elsewhere, and IE9 gets upset with the load order of the two. This leaves you with two options: change everything to window.load or use a setTimer().
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Detecting if an NSString contains…?
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Actually, "length" of NSRange should be tested...not "location".Here it is directly from source: "These methods return length==0 if the target string is not found. So, to check for containment: ([str rangeOfString:@"target"].length > 0). Note that the length of...
Batch file. Delete all files and folders in a directory
...reate a batch file
Copy the below text into the batch file
set folder="C:\test"
cd /d %folder%
for /F "delims=" %%i in ('dir /b') do (rmdir "%%i" /s/q || del "%%i" /s/q)
It will delete all files and folders.
share
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How to get a resource id with a known resource name?
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This is pretty useful in the context of writing tests to make sure certain strings exist or etc.
– Ehtesh Choudhury
May 1 '15 at 22:14
1
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android on Text Change Listener
... the listener. But that wasn't very elegant.
After doing some research and testing I discovered that using getText().clear() clears the text in much the same way as setText(""), but since it isn't setting the text the listener isn't called, so that solved my problem. I switched all my setText("") ca...