大约有 16,000 项符合查询结果（耗时：0.0197秒） [XML]
How do you find the row count for all your tables in Postgres
...he outer xpath() will then extract the count information from that xml and convert it to a number
The derived table is not really necessary, but makes the xpath() a bit easier to understand - otherwise the whole query_to_xml() would need to be passed to the xpath() function.
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NSUserDefaults not cleared after app uninstall on simulator
... answered Oct 16 '14 at 8:53
sys4tronsys4tron
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Get nested JSON object with GSON using retrofit
...= new Retrofit.Builder()
.baseUrl(url)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();
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Convert PDF to clean SVG? [closed]
I'm attempting to convert a PDF to SVG. However, the one I am using currently maps a path for every letter in every piece of text, meaning if I change the text in its source file, it looks ugly.
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How do I convert from BLOB to TEXT in MySQL?
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That's unnecessary. Just use SELECT CONVERT(column USING utf8) FROM..... instead of just SELECT column FROM...
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Why does Convert.ToString(null) return a different value if you cast null?
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There are 2 overloads of ToString that come into play here
Convert.ToString(object o);
Convert.ToString(string s);
The C# compiler essentially tries to pick the most specific overload which will work with the input. A null value is convertible to any reference type. In this case ...
IPC performance: Named Pipe vs Socket
...nly 16% better than TCP sockets.
Results are get with IPC benchmarking:
System: Linux (Linux ubuntu 4.4.0 x86_64 i7-6700K 4.00GHz)
Message: 128 bytes
Messages count: 1000000
Pipe benchmark:
Message size: 128
Message count: 1000000
Total duration: 27367.454 ms
Average duration: ...
Is there a concise way to iterate over a stream with indices in Java 8?
... class CollectionUtils {
private CollectionUtils() { }
/**
* Converts an {@link java.util.Iterator} to {@link java.util.stream.Stream}.
*/
public static <T> Stream<T> iterate(Iterator<? extends T> iterator) {
int characteristics = Spliterator.ORDERED ...
Why is there no SortedList in Java?
...the comments) you need to poll() the queue until empty.
Note that you can convert a list to a priority queue via the constructor that takes any collection:
List<String> strings = new ArrayList<String>()
strings.add("lol");
strings.add("cat");
PriorityQueue<String> sortedStrings ...
How do I make calls to a REST api using C#?
...orization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", Convert.ToBase64String(cred));
client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
System.Net.Http.HttpContent content = new Strin...