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Pass column name in data.table using variable [duplicate]
...emp <- quote(list(x, v))
DT[ , eval(temp)]
# x v
# 1: b 1.52566586
# 2: b 0.66057253
# 3: b -1.29654641
# 4: a -1.71998260
# 5: a 0.03159933
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jumpserver-华为云免费堡垒机解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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1.删除redhat原有的yum
rpm -aq|grep yum|xargs rpm -e --nodeps
2.下载yum安装文件
wget http://mirrors.163.com/centos/6.7/os/x86_64/Packages/yum-3.2.29-69.el6.centos.noarch.rpm
wget http://mirrors.163.com/centos/6.7/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
wge...
Annotate for mac – Mac最好的截图工具 gif截图 破解 免费下载 - 软件下载...
...图 破解 免费下载Annotate macos 截图 最好 工具Annotate for mac 2.0.5 专业mac截图注释分享软件 最新破解版 介绍Annotate for mac 2.0.5Annotate for mac(以前称为Glui)是最...Annotate for mac 2.0.5 专业mac截图注释分享软件 最新破解版 介绍
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How to display long messages in logcat
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edited Jan 29 '14 at 8:44
berkuqo
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How is the Linux kernel tested ?
...://stackoverflow.com/a/42316607/895245
KGDB: https://stackoverflow.com/a/44226360/895245
My own QEMU + Buildroot + Python setup
I also started a setup focused on ease of development, but I ended up adding some simple testing capabilities to it as well: https://github.com/cirosantilli/linux-kernel...
Copy and paste content from one file to another file in vi
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224
Since you already know how to cut/yank text, here are a few ideas for pasting it back into ano...
Style disabled button with CSS
...lement. It works for all the elements.
For browsers/devices supporting CSS2 only, you can use the [disabled] selector.
As with the image, don't put an image in the button. Use CSS background-image with background-position and background-repeat. That way, the image dragging will not occur.
Selecti...
Capture Video of Android's Screen
...zJoe Fernandez
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Elasticsearch query to return all records
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29 Answers
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Set attributes from dictionary in python
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edited Mar 17 '10 at 22:55
answered Mar 17 '10 at 21:57
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