大约有 44,956 项符合查询结果（耗时：0.0611秒） [XML]
Does a valid XML file require an XML declaration?
...aration is optional. See section 2.8 of the XML 1.0 Recommendation, where it says it "should" be used -- which means it is recommended, but not mandatory. In XML 1.1, however, the declaration is mandatory. See section 2.8 of the XML 1.1 Recommendation, where it says "MUST" be used. It even goes on ...
Tree data structure in C#
...ed. An Extensive Examination of Data Structures Using C# 2.0 explains a bit about why. Is there a convenient library which is commonly used to provide this functionality? Perhaps through a strategy pattern to solve the issues presented in the article.
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How do I update the notification text for a foreground service in Android?
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I would think that calling startForeground() again with the same unique ID and a Notification with the new information would work, though I have not tried this scenario.
Update: Based on the comments, you should use NotifcationManager to update the notification and your servi...
Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
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This probably has do with conflicts in your L2 cache.
Cache misses on matice1 are not the problem because they are accessed sequentially.
However for matice2 if a full column fits in L2 (i.e when you access matice2[0, 0], matice2[1, 0], matice2[2...
Improving bulk insert performance in Entity framework [duplicate]
I want to insert 20000 records in a table by entity framework and it takes about 2 min. Is there any way other than using SP to improve its performance. This is my code:
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Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but
...See the C FAQ, Question 1.32
Q: What is the difference between these initializations?
char a[] = "string literal";
char *p = "string literal";
My program crashes if I try to assign a new value to p[i].
A: A string literal (the formal term
for a double-quoted string in C
source) c...
Get nth character of a string in Swift programming language
...w can I get the nth character of a string? I tried bracket( [] ) accessor with no luck.
45 Answers
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Building big, immutable objects without using constructors having long parameter lists
...Every time I run into that case I tend to create constructor abominations with long parameter lists.
9 Answers
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Logging in Scala
...od way to do logging in a Scala application? Something that is consistent with the language philosophy, does not clutter the code, and is low-maintenance and unobtrusive. Here's a basic requirement list:
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Semi-transparent color layer over background-image?
...ould like to put a pattern as background. This pattern is gray. So to make it a little more nice, I would like to put a light transparent color "layer" over. Below is what I tried but which did not work. Is there a way to put the colored layer over the background image?
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