大约有 31,100 项符合查询结果（耗时：0.0334秒） [XML]
Length of string in bash
... would like to show the difference between string length and byte length:
myvar='Généralités'
chrlen=${#myvar}
oLang=$LANG oLcAll=$LC_ALL
LANG=C LC_ALL=C
bytlen=${#myvar}
LANG=$oLang LC_ALL=$oLcAll
printf "%s is %d char len, but %d bytes len.\n" "${myvar}" $chrlen $bytlen
will render:
Génér...
How do you iterate through every file/directory recursively in standard C++?
...iterator;
...
for (const auto& dirEntry : recursive_directory_iterator(myPath))
std::cout << dirEntry << std::endl;
As of C++17, std::filesystem is part of the standard library and can be found in the <filesystem> header (no longer "experimental").
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Read password from stdin
...rompting me and waiting for a password even though I piped the password to my script
– Michael
Dec 21 '13 at 21:30
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How to download HTTP directory with all files and sub-directories as they appear on the online files
...
you can use lftp, the swish army knife of downloading if you have bigger files you can add --use-pget-n=10 to command
lftp -c 'mirror --parallel=100 https://example.com/files/ ;exit'
...
ipython: print complete history (not just current session)
...onus of seeing the SQL commands that generated the output. Here's mine for my ipython %history in ~/.ipython/profile_default/history.sqlite:
And it even has a menu for generating plots (scatter, line, bar, etc) from your data!
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Modelling an elevator using Object-Oriented Analysis and Design [closed]
...o object-oriented design and analysis. This is one of them; unfortunately, my OOP professor in college never actually gave an answer to it, and so I've been wondering.
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'AND' vs '&&' as operator
...
For safety, I always parenthesise my comparisons and space them out. That way, I don't have to rely on operator precedence:
if(
((i==0) && (b==2))
||
((c==3) && !(f==5))
)
...
difference between foldLeft and reduceLeft in Scala
... I'm not sure if I understand your question correctly. What my 5-year-old answer is saying about the reduce function is that a List[Banana] can be reduced to a single Banana or a single Fruit or a single Food. Because Fruit :> Banana and `Food :> Banana'.
–...
Why do enum permissions often have 0, 1, 2, 4 values?
...rmissions.Delete == 4 == 00000100
Notice a pattern here? Now if we take my original example, i.e.,
var permissions = Permissions.Read | Permissions.Write;
Then...
permissions == 00000011
See? Both the Read and Write bits are set, and I can check that independently (Also notice that the De...
iOS Safari – How to disable overscroll but allow scrollable divs to scroll normally?
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Using Tyler Dodge's excellent answer kept lagging on my iPad, so I added some throttling code, now it's quite smooth. There is some minimal skipping sometimes while scrolling.
// Uses document because document will be topmost level in bubbling
$(document).on('touchmove',funct...