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When to use volatile with multi threading?
...essing a shared variable is something which calls for protection via a mutem>x m> isn't it?
But in that case, between the thread locking and releasing the mutem>x m> the code is in a critical section where only that one thread can access the variable, in which case the variable doesn't need to be volatile?
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minimum double value in C/C++
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-DBL_MAm>X m> in ANSI C, which is defined in float.h.
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What happens if you call erase() on a map element while iterating from begin to end?
In the following code I loop through a map and test if an element needs to be erased. Is it safe to erase the element and keep iterating or do I need to collect the keys in another container and do a second loop to call the erase()?
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How do I unit test web api action method when it returns IHttpActionResult?
Let's assume this is my action method
6 Answers
6
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Split delimited strings in a column and insert as new rows [duplicate]
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Here is another way of doing it..
df <- read.table(tem>x m>tConnection("1|a,b,c\n2|a,c\n3|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F)
df
## V1 V2
## 1 1 a,b,c
## 2 2 a,c
## 3 3 b,d
## 4 4 e,f
s <- strsplit(df$V2, split = ",")
data.frame(V1 = rep(df...
JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
I was encountering a lot of bugs in my code because I em>x m>pected this em>x m>pression:
2 Answers
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How do you round to 1 decimal place in Javascript?
Can you round a number in javascript to 1 character after the decimal point (properly rounded)?
21 Answers
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Nearest neighbors in high-dimensional data?
...arching -- for music information retrieval.
You may be interested in Approm>x m>imate Nearest Neighbor (ANN) algorithms. The idea is that you allow the algorithm to return sufficiently near neighbors (perhaps not the nearest neighbor); in doing so, you reduce complem>x m>ity. You mentioned the kd-tree; that ...
What is the idiomatic Go equivalent of C's ternary operator?
... var+if+else block of code, though, this spelling is also used often:
indem>x m> := val
if val <= 0 {
indem>x m> = -val
}
and if you have a block of code that is repetitive enough, such as the equivalent of int value = a <= b ? a : b, you can create a function to hold it:
func min(a, b int) int ...
MFC Grid control 2.27 - C/C++ - 清泛网 - 专注IT技能提升
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Preface
This grid is the work of thousands of hours of squinting at pim>x m>els, hunting memory leaks, adding new features, fim>x m>ing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from all over the w...