大约有 23,000 项符合查询结果（耗时：0.0350秒） [XML]
How can I shuffle the lines of a text file on the Unix command line or in a shell script?
... to head.
A performance comparison is made.
POSIX-compliant function based on awk, sort, and cut, adapted from the OP's own answer:
shuf() { awk 'BEGIN {srand(); OFMT="%.17f"} {print rand(), $0}' "$@" |
sort -k1,1n | cut -d ' ' -f2-; }
Perl-based function - adapted from Moo...
Throw an error in a MySQL trigger
... JustinJustin
2,77555 gold badges3939 silver badges6464 bronze badges
1
...
Visual Studio: How to “Copy to Output Directory” without copying the folder structure?
...ry to the root folder VS2017:
<ItemGroup Condition="'$(Platform)' == 'x64'">
<None Include="Libs\x64\**" Link="\%(Filename)%(Extension)" CopyToOutputDirectory="PreserveNewest" />
</ItemGroup>
<ItemGroup Condition="'$(Platform)' == 'x86'">
<None Include="Libs\x86\*...
range() for floats
...nswer over the accepted one, because the first two solutions presented are based on iterating over integers and deriving the final floats from the integers. This is more robust. If you do it directly with floats, you risk having strange one-off errors due to how floats are represented internally. Fo...
Deep copy of a dict in python
...
Python 2 or 3:
Python 3.2 (r32:88445, Feb 20 2011, 21:30:00) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import copy
>>> my_dict = {'a': [1, 2, 3], 'b': [4, 5, 6]}
>>> my_copy = copy.deepcopy(my_dict)
&g...
Rename Pandas DataFrame Index
...0
B 1 25
2 35
Name: val, dtype: int64
In [28]: x.index = x.index.set_names('foo', level=1)
In [29]: x
Out[29]:
year foo prod
1 A 1 10
2 20
B 1 15
2 25
2 A 1 20
2 30...
Convert HH:MM:SS string to seconds only in javascript
... Math.pow is very slow and can be avoided as shown in other answers based on reduce
– Alejadro Xalabarder
May 3 at 13:57
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show 1 mor...
Optional Parameters with C++ Macros
...atform, at least tested for
GNU/Linux + GCC (GCC 4.9.2 on CentOS 7.0 x86_64)
GNU/Linux + CLANG/LLVM, (CLANG/LLVM 3.5.0 on CentOS 7.0 x86_64)
OS X + Xcode, (XCode 6.1.1 on OS X Yosemite 10.10.1)
Windows + Visual Studio, (Visual Studio 2013 Update 4 on Windows 7 SP1 64 bits)
For the lazies, just ...
Shell command to sum integers, one per line?
...
1364
+500
Bit of ...
Can my enums have friendly names? [duplicate]
... @Roy - that's not always true, sometimes (precisely when is based on an implementation detail) the C# compiler will emit a Dictionary lookup instead, see: stackoverflow.com/questions/3366376/…
– John Rasch
Mar 2 '11 at 20:23
...