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minimum double value in C/C++
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-DBL_MAX in ANSI C, which is defined in float.h.
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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(textConnection("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...
When to use volatile with multi threading?
...essing a shared variable is something which calls for protection via a mutex isn't it?
But in that case, between the thread locking and releasing the mutex 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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What is the idiomatic Go equivalent of C's ternary operator?
... var+if+else block of code, though, this spelling is also used often:
index := val
if val <= 0 {
index = -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 ...
What's the 'Ruby way' to iterate over two arrays at once
More of a syntax curiosity than a problem to solve...
7 Answers
7
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Nearest neighbors in high-dimensional data?
...arching -- for music information retrieval.
You may be interested in Approximate 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 complexity. You mentioned the kd-tree; that ...
How to get all possible combinations of a list’s elements?
... of elements from
the input iterable.
Combinations are emitted in lexicographic sort order. So, if the
input iterable is sorted, the
combination tuples will be produced in
sorted order.
Since 2.6, batteries are included!
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How do I find all of the symlinks in a directory tree?
...fact the find man page says:
-L Follow symbolic links. When find examines or prints information
about files, the information used shall be taken from the prop‐
erties of the file to which the link points, not from the link
itself (unless it is a broken sym...
Detecting iOS / Android Operating system
... mode u can test it on desktop browsers.
– DaFunkyAlex
Jul 13 '15 at 8:47
4
@feeela sometimes the...
What code analysis tools do you use for your Java projects? [closed]
...he PMD web page.
I'd like to point out that these tools can sometimes be extended beyond their "out-of-the-box" set of rules. And not just because they're open source so that you can rewrite them. Some of these tools come with applications or "hooks" that allow them to be extended. For example, PMD...