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How can I see the size of files and directories in linux? [closed]
...
564
Use ls command for files and du command for directories.
Checking File Sizes
ls -l filename ...
Transpose/Unzip Function (inverse of zip)?
...pecial * operator.
>>> zip(*[('a', 1), ('b', 2), ('c', 3), ('d', 4)])
[('a', 'b', 'c', 'd'), (1, 2, 3, 4)]
The way this works is by calling zip with the arguments:
zip(('a', 1), ('b', 2), ('c', 3), ('d', 4))
… except the arguments are passed to zip directly (after being converted to...
Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...和操作
3.1. 模式
3.2. 操作
4. awk的环境变量
5. awk运算符
6. 记录和域
6.1. 记录
6.2. 域
6.3. 域分隔符
7. gawk专用正则表达式元字符
8. POSIX字符集
9. ...
How to serialize an object to XML without getting xmlns=“…”?
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143
Ahh... nevermind. It's always the search after the question is posed that yields the answer. ...
How to get the difference between two arrays in JavaScript?
...:52
Ivar
4,0401111 gold badges3939 silver badges4747 bronze badges
answered Jul 27 '09 at 11:20
ThinkerThinker...
[] and {} vs list() and dict(), which is better?
...icts:
>>> from timeit import timeit
>>> timeit("[]")
0.040084982867934334
>>> timeit("list()")
0.17704233359267718
>>> timeit("{}")
0.033620194745424214
>>> timeit("dict()")
0.1821558326547077
and for non-empty:
>>> timeit("[1,2,3]")
0.243163...
How to remove an element from an array in Swift
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314
The let keyword is for declaring constants that can't be changed. If you want to modify a variab...
sphinx-build fail - autodoc can't import/find module
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answered Sep 3 '12 at 10:47
Pravitha VPravitha V
3,01644 gold badges2424 silver badges4949 bronze badges
...
Max length for client ip address [duplicate]
...
For IPv4, you could get away with storing the 4 raw bytes of the IP address (each of the numbers between the periods in an IP address are 0-255, i.e., one byte). But then you would have to translate going in and out of the DB and t...
How to append rows to an R data frame
...e the data.frame is created as the last step.
# Use preallocated vectors
f4 <- function(n) {
x <- numeric(n)
y <- character(n)
for (i in 1:n) {
x[i] <- i
y[i] <- i
}
data.frame(x, y, stringsAsFactors=FALSE)
}
microbenchmark from the "microbenchmark" package will g...