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Node.js throws “btoa is not defined” error
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mscdexmscdex
87.3k1212 gold badges152152 silver badges122122 bronze badges
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Reference - What does this error mean in PHP?
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Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given
First and forem...
The tilde operator in C
...ame value as -x. For example, printf("%hx %hx\n", -1234, ~1234 + 1) prints fb2e fb2e on my machine.
– Steve Summit
Jan 26 '16 at 23:00
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WSAAsyncSelect模型 - C/C++ - 清泛网 - 专注C/C++及内核技术
..._USER+1)
同时在该文件中加入一个自定义消息处理函数
afx_msg LRESULT OnSocketMsg(WPARAM wParam,LPARAM lParam);
在testDlg.cpp中定义
ON_MESSAGE(WM_SOCKET,OnSocketMsg)
在OnInitDialog中加入自己的初始化代码
// TODO: 在此添加额外的初始化代码
WS...
How to debug Lock wait timeout exceeded on MySQL?
...ervation count 9014315, signal count 7805377
Mutex spin waits 0, rounds 11487096053, OS waits 7756855
RW-shared spins 722142, OS waits 211221; RW-excl spins 787046, OS waits 39353
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LATEST FOREIGN KEY ERROR
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110507 21:41:35 Transaction:
TRANSACTION 0 60...
Multiple linear regression in Python
... 0.098 -0.049 0.534
x2 0.2360 0.149 1.587 0.129 -0.075 0.547
x3 -0.0618 0.145 -0.427 0.674 -0.365 0.241
const 1.5704 0.633 2.481 0.023 0.245 2.895
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How do I use installed packages in PyCharm?
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In PyCharm 4 CE: Go to the 'Project Interpreter'. Click the gear to the right of the interpreter's path. It will bring up a short drop-do...
Convert RGB to RGBA over white
I have a hex color, e.g. #F4F8FB (or rgb(244, 248, 251) ) that I want converted into an as-transparent-as-possible rgba color (when displayed over white). Make sense? I'm looking for an algorithm, or at least idea of an algorithm for how to do so.
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How to resize a VirtualBox vmdk file
... Size Used Avail Use% Mounted on
/dev/mapper/myfs-vg-cloud 97G 87G 6.0G 94% /
$ resize2fs /dev/mapper/myfs-vg-cloud
$ df -h /home/
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/myfs-vg-cloud 196G 87G 101G 47% /
Your system must now be ...
Searching for UUIDs in text with regex
...n.
– Stephane Janicaud
Mar 27 at 12:46
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