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大数据：用数据指导APP运营 - 资讯 - 清泛网 - 专注C/C++及内核技术
...效果。
在这里插一句，千万不要相信网上流传的各种《XX高管教你不花钱做运营》这种鸡汤文，运营一定有成本，必然有成本，如果认为运营高手可以不花钱办成事儿，那不如去相信男人可以怀孕生孩子。运营的效率可以通过...
Where to find extensions installed folder for Google Chrome on Mac?
...
On chrome 80xx, MacOS 10.15.3 --> /Users/xxxxxxx/Library/Application Support/Google/Chrome/Profile 1/Extensions/
– sunnyuff
Mar 31 at 19:21
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Remove all occurrences of char from string
...
will work.
Usage would be str.replace("X", "");.
Executing
"Xlakjsdf Xxx".replaceAll("X", "");
returns:
lakjsdf xx
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Extract a regular expression match
...syntax and adds a few that are missing:
library(stringr)
str_locate("aaa12xxx", "[0-9]+")
# start end
# [1,] 4 5
str_extract("aaa12xxx", "[0-9]+")
# [1] "12"
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How can I add a vertical scrollbar to my div automatically?
...
You can set :
overflow-y: scroll;height: XX px
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Multiplication on command line terminal
...he trick of interpreting '5X5'
$ function calc { bc -l <<< ${@//[xX]/*}; };
$ calc 5X5
25
$ calc 5x5
25
$ calc '5*5'
25
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What does PermGen actually stand for?
...n is used by the JVM to hold loaded classes. You can increase it using:
-XX:MaxPermSize=384m
if you're using the Sun JVM or OpenJDK.
So if you get an OutOfMemoryException: PermGen you need to either make PermGen bigger or you might be having class loader problems.
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Count number of occurrences of a pattern in a file (even on same line)
...regex to span \n-delimited lines (if you need it).
printf 'X \n moo X\n XX\n' |
awk -vRS='X[^X]*X' 'END{print (NR<2?0:NR-1)}'
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PHP page redirect [duplicate]
...o returns a REDIRECT (302) status code to the browser unless the 201 or a 3xx status code has already been set."
– colithium
Jul 15 '10 at 22:14
4
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Clearing coverage highlighting in Eclipse
... and open it.
Click on Coverage.
To clear highlightings, click on X or XX icon as per convenience.
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