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What is the maximum length of a table name in Oracle?
What are the maximum length of a table name and column name in Oracle?
12 Answers
12
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Why can't R's ifelse statements return vectors?
I've found R's ifelse statements to be pretty handy from time to time. For example:
9 Answers
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Getting an element from a Set
Why doesn't Set provide an operation to get an element that equals another element?
24 Answers
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Why is extending native objects a bad practice?
Every JS opinion leader says that extending the native objects is a bad practice. But why? Do we get a perfomance hit? Do they fear that somebody does it "the wrong way", and adds enumerable types to Object , practically destroying all loops on any object?
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Get name of caller function in PHP?
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See debug_backtrace - this can trace your call stack all the way to the top.
Here's how you'd get your caller:
$trace = debug_backtrace();
$caller = $trace[1];
echo "Called by {$caller['function']}";
if (isset($caller['class']))...
Detect enter press in JTextField
Is it possible to detect when someone presses Enter while typing in a JTextField in java? Without having to create a button and set it as the default.
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Structs versus classes
I'm about to create 100,000 objects in code. They are small ones, only with 2 or 3 properties. I'll put them in a generic list and when they are, I'll loop them and check value a and maybe update value b .
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Equivalent of “throw” in R
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See help(tryCatch):
Conditions are signaled by
'signalCondition'. In addition, the
'stop' and 'warning' functions have
been modified to also accept
condition arguments.
and later under 'See Also':
'stop' and 'warning' signal conditions, and 'try' is esse...
string to string array conversion in java
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I want to convert into a string array.
How do I do it?
Is there any java built in function? Manually I can do it but I'm searching for a java built in function.
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海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...hashcode却不能做到，这个就是局部敏感哈希的魅力。目前Broder提出的shingling算法和Charikar的simhash算法应该算是业界公认比较好的算法。在simhash的发明人Charikar的论文中并没有给出具体的simhash算法和证明，“量子图灵”得出的证明...