大约有 22,000 项符合查询结果(耗时:0.0382秒) [XML]

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How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]

...e (most likely 4000 bytes) otherwise you will run into ORA-01489 result of string concatenation is too long. – JanM Jun 21 '17 at 9:37 ...
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Implement C# Generic Timeout

...g the ThreadAbortException: Usage: class Program { static void Main(string[] args) { //try the five second method with a 6 second timeout CallWithTimeout(FiveSecondMethod, 6000); //try the five second method with a 4 second timeout //this will throw a time...
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Why use non-member begin and end functions in C++11?

... } Then using the member functions breaks your code for T = C arrays, C strings, enums, etc. By using the non-member functions, you advertise a more generic interface that people can easily extend. By using the free function interface: template <class T> void foo(T& v) { auto i = beg...
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python design patterns [closed]

...ttributes." return self def __repr__(self): "Return a string representation." return "<Null>" def __str__(self): "Convert to a string and return it." return "Null" With this, if you do Null("any", "params", "you", "want").attribute_that_doesn...
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Getting HTTP code in PHP using curl

... First make sure if the URL is actually valid (a string, not empty, good syntax), this is quick to check server side. For example, doing this first could save a lot of time: if(!$url || !is_string($url) || ! preg_match('/^http(s)?:\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/....
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Android WebView style background-color:transparent ignored on android 2.2

..., 0, 0, 0)); will not work. so here is my solution, worked for me. String webData = StringHelper.addSlashes("<!DOCTYPE html><head> <meta http-equiv=\"Content-Type\" " + "content=\"text/html; charset=utf-8\"> </head><body><div style=\"background-color: r...
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How to escape indicator characters (i.e. : or - ) in YAML

... @ivan_pozdeev: The quotes go around the entire string. - 'PS4="+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }"' – Ry-♦ Dec 19 '17 at 5:39 ...
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What is the difference between integration and unit tests?

...re classes. Another case is that most classes use third-party classes (the String/string class, collection classes, etc.) which don't make sense to be mocked or isolated from; we simply regard them as stable and reliable dependencies which are outside the testing scope. – Rogé...
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What is the better API to Reading Excel sheets in java - JXL or Apache POI [closed]

...sn't support rich text formatting, i.e. different formatting within a text string; Apache POI does support it. JXL only supports certain text rotations: horizontal/vertical, +/- 45 degrees, and stacked; Apache POI supports any integer number of degrees plus stacked. JXL doesn't support drawing shape...
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Are non-synchronised static methods thread safe if they don't modify static class variables?

...cal to the thread, so no sharing of data occurs, ever. Immutable objects (String in this case) are also thread-safe because once created they can't be changed and all threads see the same value. On the other hand if the method was accepting (mutable) Date you could have had a problem. Two threads c...