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What are the differences between virtual memory and physical memory?
...r head around have to do with specific implementations of virtual memory, most likely paging. There is no one way to do paging - there are many implementations and the one your textbook describes is likely not the same as the one that appears in real OSes like Linux/Windows - there are probably subt...
How to count the number of files in a directory using Python
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os.listdir() will be slightly more efficient than using glob.glob. To test if a filename is an ordinary file (and not a directory or other entity), use os.path.isfile():
import os, os.path
# simple version for working with...
Wi-Fi 是什么的缩写 - 创意 - 清泛网 - 专注C/C++及内核技术
... 802.11 标准的无线网络技术作为己任，因此他们认为需要一个朗朗上口的名字来代替拗口的专业术语（呃…什么？802.11b 直接序列扩频？那是什么东西…），以便这个概念能更好地在民间扩散。
这时候，上图中出镜的联盟创始人...
How to use “/” (directory separator) in both Linux and Windows in Python?
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Use os.path.join().
Example: os.path.join(pathfile,"output","log.txt").
In your code that would be: rootTree.write(os.path.join(pathfile,"output","log.txt"))
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Bill Gross超火爆演讲: 创业成功唯一最关键因素 - 资讯 - 清泛网 - 专注C/C++及内核技术
...挨了一拳。”这句话用来比拟商业，真是再恰当不过。
一个团队的执行力，很大程度体现在：它适应客户打在他脸上拳头的能力，客户是真正的现实主义，这也是为什么我后来觉得，团队可能是最重要因素的原因。
第二，我...
How to split a dos path into its components in Python
I have a string variable which represents a dos path e.g:
19 Answers
19
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Check OS version in Swift?
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For iOS, try:
var systemVersion = UIDevice.current.systemVersion
For OS X, try:
var systemVersion = NSProcessInfo.processInfo().operatingSystemVersion
If you just want to check if the users is running at least a specifi...
Sound alarm when code finishes
...uency in Hz and the duration is in milliseconds.
On Linux and Mac
import os
duration = 1 # seconds
freq = 440 # Hz
os.system('play -nq -t alsa synth {} sine {}'.format(duration, freq))
In order to use this example, you must install sox.
On Debian / Ubuntu / Linux Mint, run this in your termin...
How to detect if app is being built for device or simulator in Swift
...e-C we can know if an app is being built for device or simulator using macros:
20 Answers
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Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...果想了解更多请查看这里的测试代码。
一、需求
今天一个“懒”程序员突然跑过来说：“反射好麻烦，我要提点需求。”听到这句话后我就知道，今天一定不好过了，奇葩需求又来了。
我们之前写反射都是要这么写：
publi...