大约有 5,476 项符合查询结果（耗时：0.0276秒） [XML]
Check if element is visible in DOM
...iewport.style.position = 'absolute';
leftOfViewport.style.right = '100000px';
leftOfViewport.textContent = 'leftOfViewport';
div.appendChild(rightOfViewport = leftOfViewport.cloneNode(false));
rightOfViewport.style.right = '0';
rightOfViewport.style.left...
Calculating distance between two points, using latitude longitude?
... Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
double distance = R * c * 1000; // convert to meters
double height = el1 - el2;
distance = Math.pow(distance, 2) + Math.pow(height, 2);
return Math.sqrt(distance);
}
...
How to set initial size of std::vector?
...erry Coffin
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What happens when there's insufficient memory to throw an OutOfMemoryError?
... stackoverflow.com/questions/9261215/… : True but if the JVM reserved 100 units of memory to do that, and spent 1 unit on the first OOM, what happens if in my OOM catch block I do e.printStackTrace()? e.printStackTrace() requires memory too. Then the JVM would spend another unit of memory to th...
How to name variables on the fly?
...
And this option?
list_name<-list()
for(i in 1:100){
paste("orca",i,sep="")->list_name[[i]]
}
It works perfectly. In the example you put, first line is missing, and then gives you the error message.
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Why does MYSQL higher LIMIT offset slow the query down?
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FROM mytable
ORDER BY
id
LIMIT 10000, 30
) q
JOIN mytable t
ON t.id = q.id
See this article:
MySQL ORDER BY / LIMIT performance: late row lookups
share
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How to delete a row by reference in data.table?
...something like this:
DT = data.table(col1 = 1:1e6)
cols = paste0('col', 2:100)
for (col in cols){ DT[, (col) := 1:1e6] }
keep.idxs = sample(1e6, 9e5, FALSE) # keep 90% of entries
DT.subset = data.table(col1 = DT[['col1']][keep.idxs]) # this is the subsetted table
for (col in cols){
DT.subset[, (c...
How to get line count of a large file cheaply in Python?
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I am working with 100Gb+ files, and your rawgencounts is the only feasible solution I have seen so far. Thanks!
– soungalo
Nov 10 '15 at 11:47
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Using semicolon (;) vs plus (+) with exec in find
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Charlie MartinCharlie Martin
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Java multiline string
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100
This is an old thread, but a new quite elegant solution (with only 4 maybe 3 little drawbacks)...