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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...要通过BCH Code来计算
然后15个bits还要与101010000010010做XOR操作。这样就保证不会因为我们选用了00的纠错级别和000的Mask，从而造成全部为白色，这会增加我们的扫描器的图像识别的困难。
下面是一个示例：
关于Error Correction L...
Copy to clipboard in Node.js?
...a chromium equivalent of copy() would be awesome.
– Bosnian Coder
Apr 6 at 20:27
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【PM干货】2015年阿里业务型PM笔试题 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...型PM笔试题一、客观题（总共十题）下面那个文件是用户系统间的数据传输：1、UML2、HTML3、XML4、WML458、346、908、739、（）正方体六个面分别是红、...一、客观题（总共十题）
下面那个文件是用户系统间的数据传输：
1、UML 2...
SearchView's OnCloseListener doesn't work
...r the SearchView in the Android 3.0+ ActionBar, but I can't get the OnCloseListener to work.
18 Answers
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Recommended Fonts for Programming? [closed]
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Either Consolas (download) or Andale Mono (download). I mostly use Andale Mono. I wrote an article about programming fonts a long time ago, I think Consolas wasn't even out yet.
http://www.deadprogrammer.com/photos/fonts.gif
I find that typing Illegal1 = O0 is a good test of suit...
Developing GUIs in Python: Tkinter vs PyQt [closed]
... in other languages too if you ever need to, and Qt is probably the best cross-platform interface toolkit available right now.
There are only two real (potential) disadvantages:
PyQt is only available under the GPL. This means if you release your code, it has to be available under a compatible li...
How do I type using my keyboard on the iphone simulator?
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When I rotate or zoom, I lose the ability. Is there a permanent solution?
– philipkd
Oct 21 '13 at 23:41
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How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...hell, you'll create a file containing a shell-function that will generate possible completions, save it into /etc/bash_completion.d/ and register it with the command complete. Here's a snippet from the linked page:
_foo()
{
local cur prev opts
COMPREPLY=()
cur="${COMP_WORDS[COMP_CWORD]...
Remove carriage return in Unix
...000 h e l l o \r \n g o o d b y e \n
0000017
dos2unix is the way to go if it's installed on your system:
$ cat infile | dos2unix -U | od -c
0000000 h e l l o \n g o o d b y e \n
0000016
If for some reason dos2unix is not available to you, the...
Xcode/Simulator: How to run older iOS version?
I'm thinking of upgrading to iOS SDK 4.2. But what I'm wondering is if I'll still be able to run the simulator as iOS 3.2. This is because I'm creating iAds for iPad but I still want to check if my program will run with iOS 3.2.
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