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Wrapping null-returning method in Java with Option in Scala?
Suppose I have a method session.get(str: String): String but you don't know whether it will return you a string or a null, because it comes from Java.
...
boost::filesystem指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...(bf::exists(path))
{
std::ofstream out(path.file_string().c_str());
if(!out) return 1;
out << "一个测试文件\n";
} else {
std::cout << path << "不存在\n";
//目录不存在，创建
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jQuery: outer html() [duplicate]
...'t execute javascript in the html while jQuery method that accepts an HTML string can execute code.
– Gqqnbig
Aug 10 '15 at 18:28
11
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Double negation (!!) in javascript - what is the purpose? [duplicate]
...alent to false in conditional statements:
false
null
undefined
The empty string "" (\ '')
The number 0
The number NaN
All other values are equivalent to true.
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Java concurrency: Countdown latch vs Cyclic barrier
...erCycles {
static CyclicBarrier barrier;
public static void main(String[] args) throws InterruptedException {
barrier = new CyclicBarrier(3);
new Worker().start();
Thread.sleep(1000);
new Worker().s
How do I print out the contents of an object in Rails for easy debugging?
..."
end
end
Then when you go to print it with #puts it will display that string with those variables.
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Releasing memory in Python
...sually deallocates at least two things at the next level down (e.g., for a string, you're releasing the PyString object, and the string buffer).
If you do deallocate an object, to know whether this causes the next level down to deallocate a block of object storage, you have to know the internal st...
convert double to int
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And doubles can be much huger than even a 64 bit int.
– Adrian Ratnapala
May 1 '13 at 8:07
7
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How to access the first property of a Javascript object?
...t foo3. If the properties are numbered as in the example, you could do a string compare to ascertain the identifier ending in '1'. Then again, if ordinality is the main concern of the collection, you should probably use an array instead of an object.
– steamer25
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Filter output in logcat by tagname
...won't work. If an unrelated process logs message that happens to have some string in it would appear.
– John Smith
Jun 19 '15 at 20:42
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