大约有 3,000 项符合查询结果（耗时：0.0115秒） [XML]
ggplot2 keep unused levels barplot
...iscrete(drop=FALSE)+
scale_fill_manual(
values = c(
"#ff6666",
"#cc9900",
"#cc9900",
),drop=FALSE)
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How do I execute any command editing its file (argument) “in place” using bash?
...you can safely sort a file in place by using commands like sort -o F F and cat F | sort -o F. However, sort with --merge (-m) can open the output file before reading all input, so a command like cat F | sort -m -o F - G is not safe as sort might start writing F before cat is done reading it.
While...
Can I Install Laravel without using Composer?
... via composer in your localhost first, and then transfer all the files via FTP to your actual website.
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How to get a list of file names in different lines
...
ls | cat
...
or possibly, ls -1
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Where are sudo incidents reported? [closed]
...place root with your username, in my case ryan, so the log is found with:
cat /var/spool/mail/ryan
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Bash variable scope
...d work as well (because echo and while are in same subshell):
#!/bin/bash
cat /tmp/randomFile | (while read line
do
LINE="$LINE $line"
done && echo $LINE )
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How to output a multiline string in Bash?
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Here documents are often used for this purpose.
cat << EOF
usage: up [--level <n>| -n <levels>][--help][--version]
Report bugs to:
up home page:
EOF
They are supported in all Bourne-derived shells including all versions of Bash.
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Anatomy of a “Memory Leak”
...free Foundations of Programming e-book.
Basically, in .NET a memory leak occurs when referenced objects are rooted and thus cannot be garbage collected. This occurs accidentally when you hold on to references beyond the intended scope.
You'll know that you have leaks when you start getting OutOfMe...
WebClient vs. HttpWebRequest/HttpWebResponse
...drop WebClient component on your form and use it to issue requests to HTTP/FTP etc servers.
– feroze
Nov 11 '09 at 1:50
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CSS center text (horizontally and vertically) inside a div block
... has at least partial support in IE 10 and 11, and works for 97% of users according to caniuse. I don't think browser support is an argument against it anymore.
– Félix Gagnon-Grenier
Sep 12 '19 at 11:28
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