大约有 40,000 项符合查询结果（耗时：0.0378秒） [XML]
Total size of the contents of all the files in a directory [closed]
...-readable format? When using du -shb (as suggested by this answer), the -b setting seems to override the -h setting.
– Mathias Bynens
Aug 1 '12 at 10:59
6
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Turning multi-line string into single comma-separated
...k it down:
awk is great at handling data broken down into fields
-vORS=, sets the "output record separator" to ,, which is what you wanted
{ print $2 } tells awk to print the second field for every record (line)
file.txt is your filename
sed just gets rid of the trailing , and turns it into a newl...
How to change the Push and Pop animations in a navigation based app
...sitionContext.finalFrame(for: tz)
let fOff = f.offsetBy(dx: f.width, dy: 55)
tz.view.frame = fOff
transitionContext.containerView.insertSubview(tz.view, aboveSubview: fz.view)
UIView.animate(
withD...
What do all of Scala's symbolic operators mean?
Scala syntax has a lot of symbols. Since these kinds of names are difficult to find using search engines, a comprehensive list of them would be helpful.
...
sed or awk: delete n lines following a pattern
... would I mix patterns and numeric ranges in sed (or any similar tool - awk for example)? What I want to do is match certain lines in a file, and delete the next n lines before proceeding, and I want to do that as part of a pipeline.
...
Hashing a file in Python
...ution 1 was modified in order to use a buffer of 20 * 4096 (PAGE_SIZE) and set buffering parameter to 0. Solution 2 only algorithm was modified (sha256 -> sha1). Result: (1) 3m37.137s (2) 3m30.003s . The native sha1sum in binary mode: 3m31.395s
– bioinfornatics
...
Setting custom UITableViewCells height
... object and the length of string could be variable. Due to this, I cannot set a constant height to the cell in the UITableView 's heightForCellAtIndex method. The cell's height depends on the label's height which can be determined using the NSString 's sizeWithFont method. I tried using it, b...
Read only the first line of a file?
How would you get only the first line of a file as a string with Python?
8 Answers
8
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Overlaying histograms with ggplot2 in R
...ers[1:3],each = 100))
ggplot(dat,aes(x=xx)) +
geom_histogram(data=subset(dat,yy == 'a'),fill = "red", alpha = 0.2) +
geom_histogram(data=subset(dat,yy == 'b'),fill = "blue", alpha = 0.2) +
geom_histogram(data=subset(dat,yy == 'c'),fill = "green", alpha = 0.2)
which produces something...
Get the distance between two geo points
...
Location loc1 = new Location("");
loc1.setLatitude(lat1);
loc1.setLongitude(lon1);
Location loc2 = new Location("");
loc2.setLatitude(lat2);
loc2.setLongitude(lon2);
float distanceInMeters = loc1.distanceTo(loc2);
Reference: http://developer.android.com/refere...