大约有 11,642 项符合查询结果(耗时:0.0297秒) [XML]

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How do I set a variable to the output of a command in Bash?

... -v users[uid] "%11d %7d %-20s %s\n" $uid $gid $user $home done {list}</etc/passwd Then echo -n "${users[@]}" 1000 1000 user /home/user ... 65534 65534 nobody /nonexistent and echo ${!users[@]} 1000 ... 65534 echo -n "${users[1000]}" 1000 1000 user ...
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)

... error related... Using the following command: grep -r -P '[^\x00-\x7f]' /etc/apache2 /etc/letsencrypt /etc/nginx Found mine in /etc/letsencrypt/options-ssl-nginx.conf: # The following CSP directives don't use default-src as Using shed, I found the offending sequence. It turned out to...
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Why does sudo change the PATH?

...d binary folders in the PATH. Having already added my requirements to /etc/environment I was surprised when I got errors about missing commands when running them under sudo..... I tried the following to fix this without sucess: Using the "sudo -E" option - did not work. My ...
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What is stability in sorting algorithms and why is it important?

...orithms are stable by nature like Insertion sort, Merge Sort, Bubble Sort, etc. And some sorting algorithms are not, like Heap Sort, Quick Sort, etc. Background: a "stable" sorting algorithm keeps the items with the same sorting key in order. Suppose we have a list of 5-letter words: peach straw...
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When to use the different log levels

...diagnostically helpful to people more than just developers (IT, sysadmins, etc.). Info - Generally useful information to log (service start/stop, configuration assumptions, etc). Info I want to always have available but usually don't care about under normal circumstances. This is my out-of-the-box c...
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Grouping functions (tapply, by, aggregate) and the *apply family

...a function to the 1st elements of each, and then the 2nd elements of each, etc., coercing the result to a vector/array as in sapply. This is multivariate in the sense that your function must accept multiple arguments. #Sums the 1st elements, the 2nd elements, etc. mapply(sum, 1:5, 1:5, 1:5) [1] ...
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@ variables in Ruby on Rails

...silent dup of variable, or making it 'const' so that it can't be modified, etc)? I'm coming from a C/C++ & Java perspective, and the really vague and optional syntax is driving me nuts! – Dan Devine Jun 13 '18 at 18:05 ...
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Single Page Application: advantages and disadvantages [closed]

...ld also work with any updates in data like notifications, profile update etc An alternate perspective: Aside from your website, will your project involve a native mobile app? If yes, you are most likely going to be feeding raw data to that native app from a server (ie JSON) and doing cl...
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How Can I Browse/View The Values Stored in Redis [closed]

... when I use redsmin status I get error: Redsmin daemon is not running.. etc/log.log is 0 bytes. What's up? – Thomson Comer Jan 22 '14 at 3:41 ...
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ALTER TABLE without locking the table?

...ferably in a transaction. Once finished, recompile any stored procedures, etc that use that table. The execution plans will likely no longer be valid. EDIT: Some comments have been made about this limitation being a bit poor. So I thought I'd put a new perspective on it to show why it's how it ...