大约有 40,000 项符合查询结果（耗时：0.0999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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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...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...个类a是基类，b继承a，c和ab没有关系。
有一个函数void function(a&a);
现在有一个对象是b的实例b，一个c的实例c。
function(static_cast<a&>(b)可以通过而function(static<a&>(c))不能通过编译，因为在编译的时候编译器已经知道c和a的类型不...
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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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.
...
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
...
Decorators with parameters?
I have a problem with the transfer of variable 'insurance_mode' by the decorator. I would do it by the following decorator statement:
...
Get list of passed arguments in Windows batch script (.bat)
... try to execute one of the ampersands (the content of %1 is "&"&)
set var=%1
set "var=%1"
set var=%~1
set "var=%~1"
But there exists a workaround with a temporary file
@echo off
SETLOCAL DisableDelayedExpansion
SETLOCAL
for %%a in (1) do (
set "prompt=$_"
echo on
for %%b in ...
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.
...
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...