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Spinlock versus Semaphore
...ad locking using machine dependent assembly instructions (such as test-and-set). It is called a spinlock because the thread simply waits in a loop ("spins") repeatedly checking until the lock becomes available (busy wait). Spinlocks are used as a substitute for mutexes, which are a facility supplied...
is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
Is it possible to do something similar to the following code in Java
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How to succinctly write a formula with many variables from a data frame?
Suppose I have a response variable and a data containing three covariates (as a toy example):
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How to get an absolute file path in Python
Given a path such as "mydir/myfile.txt" , how do I find the file's absolute path relative to the current working directory in Python? E.g. on Windows, I might end up with:
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Linking R and Julia?
Julia looks very promising for fast and syntax-sane computation (e.g. here ), but I suspect it will not be anywhere near R in terms of overall statistics workflow for some time yet. So I'd like to use it where C++ is mainly used in R programs: to optimize slow portions of code. Before I invest th...
How do I split a multi-line string into multiple lines?
I have a multi-line string literal that I want to do an operation on each line, like so:
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Case insensitive string as HashMap key
... //might want to implement compare too if you want to use with SortedMaps/Sets.
}
This would allow you to use any implementation of Hashtable in java and to have O(1) hasCode().
一个自媒体的运营手记：我做公众号已经两年多了 - 资讯 - 清泛网 - 专注C/C...
...把衣服吹透透了，脸都冻僵了，心里想，今天自己真是no cuo no die啊，心里有一万个后悔，但是如果退回去，则是更难退，因为退回去的路更难，所以只好痛苦的坚持着，不知道后悔了多少次，想后退多少次，我也不知道，反正...
Getting the object's property name
I was wondering if there was any way in JavaScript to loop through an object like so.
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Or versus OrElse
What's the difference between or and OrElse ?
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