大约有 16,000 项符合查询结果（耗时：0.0508秒） [XML]
SQL update query using joins
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Excellent, the use of the CTE makes it simple to convert the original SELECT into an UPDATE
– SteveC
Jun 14 '13 at 14:48
4
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Java optional parameters
...ate optional parameters in Java:
Method overloading.
void foo(String a, Integer b) {
//...
}
void foo(String a) {
foo(a, 0); // here, 0 is a default value for b
}
foo("a", 2);
foo("a");
One of the limitations of this approach is that it doesn't work if you have two optional parameters...
How can I check whether a option already exist in select by JQuery
...n there, instead of producing the 0 or 1 like the other does and having to convert it. I say both approaches are fine because you have to do 2 steps, either way. This seems more visible to the process, to me, and less prone to error by not judging the length of whitespace, for instance, like .leng...
Echo equivalent in PowerShell for script testing
...ut-String, because with any non-trivial object, you'll need to use that to convert the object to a display-able string before using any of those three Write-* cmdlets.
– Jaykul
Nov 2 '09 at 7:11
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Split an NSString to access one particular piece
...0]
Although note that it gives you an array of Substring. If you need to convert these back to ordinary strings, use map
let strings = "10/04/2011".split(separator: "/").map{ String($0) }
let firstBit = strings[0]
or
let firstBit = String(substrings[0])
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How can I implode an array while skipping empty array items?
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If no callback is supplied, all entries of input equal to FALSE (see converting to boolean) will be removed.
implode('-', array_filter($array));
Obviously this will not work if you have 0 (or any other value that evaluates to false) in your array and you want to keep it. But then you can ...
Extracting specific columns in numpy array
... instead an array containing the elements of the column you extracted.
To convert it to Matrix the reshape(M,1) method should be used on the resulting array.
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How to set top-left alignment for UILabel for iOS application?
...rticalAlignmentMiddle,
VerticalAlignmentBottom,
} VerticalAlignment;
@interface SOLabel : UILabel
@property (nonatomic, readwrite) VerticalAlignment verticalAlignment;
@end
SOLabel.m
@implementation SOLabel
-(id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
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How do lexical closures work?
... * j
return func
flist.append(funcC(i))
for f in flist:
print f(2)
This is what happens when you mix side effects and functional programming.
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What data type to use for money in Java? [closed]
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What about serialization and saving into db? What format should be used for sending over wire?
– Paweł Szczur
Dec 7 '15 at 11:28
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