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Does free(ptr) where ptr is NULL corrupt memory?
... the problem was in things like Version 7 Unix. When I was learning, free(xyz) where xyz == NULL was a recipe for instant disaster on the machine where I learned (ICL Perq running PNX, which was based on Version 7 Unix with some System III extras). But I've not code that way for a long time.
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Run a string as a command within a Bash script
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For me echo XYZ_20200824.zip | grep -Eo '[[:digit:]]{4}[[:digit:]]{2}[[:digit:]]{2}'
was working fine but unable to store output of command into variable.
I had same issue I tried eval but didn't got output.
Here is answer for my problem...
乘着App的创业浪潮 行业短信也迎来了新生和爆发 - 资讯 - 清泛网 - 专注C/C...
...年滴滴打车提速补贴之时，滴滴一位产品负责人偶然百度搜索了“滴滴打车问题”， 居然发现有一万多条搜索结果：其中很多用户反馈的是接收不到滴滴打车发送的手机验证码很大程度上影响了用户体验。
难题何解：用户体验...
Wi-Fi 是什么的缩写 - 程序人生、谈天论地 - 清泛IT论坛，有思想、有深度
请对照上图自测。如果你是 Level 0，阅读本文前建议先搜索并查看相关资料学习 Wi-Fi 的基本概念，本文将不涉及定义或技术上的解释。Wi-Fi 是 Wireless Fidelity 吗一天和客户闲聊，我随口问了一句，Wi-Fi 是什么的缩写？客户是个美...
为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
... 开通VIP 搜索 为AppInventor2开发拓展(Extension)
为什么需要开发拓展？
环境配置
源码下载
代码编写
拓...
What is an IIS application pool?
...a big shot company it might take or also ready to host another website say xyz.com(ecommerce based).
Now web server is hosting i.e providing memory to run both websites on its single web server.Thus , here application pools come into picture .
abc.com has its own rules, business logic , data etc an...
surface plots in matplotlib
... the 2D-arrays
x = X.reshape(1600)
y = Y.reshape(1600)
z = Z.reshape(1600)
xyz = {'x': x, 'y': y, 'z': z}
# put the data into a pandas DataFrame (this is what my data looks like)
df = pd.DataFrame(xyz, index=range(len(xyz['x'])))
# re-create the 2D-arrays
x1 = np.linspace(df['x'].min(), df['x'].m...
How do I get the file name from a String containing the Absolute file path?
...Utils in Apache Commons IO :
String name1 = FilenameUtils.getName("/ab/cd/xyz.txt");
String name2 = FilenameUtils.getName("c:\\ab\\cd\\xyz.txt");
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How can I delete all of my Git stashes at once?
...h drop type_your_index
> git stash list
stash@{0}: abc
stash@{1}: xyz
stash@{1}: pqr
> git stash drop 0
Dropped refs/stash@{0}
> git stash list
stash@{0}: xyz
stash@{1}: pqr
if you want to remove all the stash at once -
> git stash clear
>
> git stash list...
Apache .htaccess 禁止访问某目录方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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一、开启Mod_rewrite模块
打开Apache2\conf\httpd.conf
搜索 LoadModule rewrite_module modules/mod_rewrite.so (Apache2是这个)
去掉前面的#
搜索AllowOverride None 替换为 AllowOverride All
有好几个找到和下面代码类似的那个
</IfModule>
#
# "D:\u...