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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
...是为什么有人在二维码的中心位置加入图标。
错误修正容量
L水平
7%的字码可被修正
M水平
15%的字码可被修正
Q水平
25%的字码可被修正
H水平
30%的字码可被修正
那么，QR是怎么对数...
How to show git log history for a sub directory of a git repo?
...w changes for src/nvfs
$ git log --oneline -- src/nvfs
d6f6b3b Changes for Mac OS X
803fcc3 Initial Commit
# Show all changes (one additional commit besides in src/nvfs).
$ git log --oneline
d6f6b3b Changes for Mac OS X
96cbb79 gitignore
803fcc3 Initial Commit
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How to select Python version in PyCharm?
...ivate it by running the Find Action command (Ctrl+Shift+A or ⌘+ ⇧+A on mac). Then type status bar and choose View: Status Bar to see it.
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How does Trello access the user's clipboard?
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Awesome! But how do you have Mac OS - do you "listen" to the Command key there?
– Suman
Jul 8 '13 at 17:25
28
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How to convert a selection to lowercase or uppercase in Sublime Text
...ransform to Uppercase
Ctrl + K, Ctrl + L Transform to Lowercase
and for Mac:
Keypress Command
cmd + KU Transform to Uppercase
cmd + KL Transform to Lowercase
Also note that Ctrl + Shift + p in Windows (⌘ + Shift + p in a Mac) brings up the Command Palette where you can search for th...
搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...驱动客户端 MongoClient(addresses)，这个可以传入多个mongos 的地址作为mongodb集群的入口，并且可以实现自动故障转移，但是负载均衡做的好不好呢？打开源代码查看：
它的机制是选择一个ping 最快的机器来作为所有请求的入口，...
Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]
...ron processor, and 1.21 GB of RAM on a x86 Windows XP Professional machine.
77 Answers
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How to find out which fonts are referenced and which are embedded in a PDF document
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For mac users, brew install poppler to easily get the pdffonts command
– Edward Newell
Mar 2 '16 at 3:00
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How to obtain the number of CPUs/cores in Linux from the command line?
...the number of all installed cores/processors use nproc --all
On my 8-core machine:
$ nproc --all
8
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Error when testing on iOS simulator: Couldn't register with the bootstrap server
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status: this has been seen as recently as Mac OS 10.8 and Xcode 4.4.
tl;dr: This can occur in two contexts: when running on the device and when running on the simulator. When running on the device, disconnecting and reconnecting the device seems to fix things.
Mike...