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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...因此MQTT协议生逢其时。当时MIT Auto-ID Labs的Kevin Ashton为了把宝洁的供应链上的RFID标签和互联网连接起来，在1999年第一个提出了IoT这个概念。发明人TCP协议的发明人是Vinton Cerf（下图左，曾在IBM工作过两年）和Robert Elliot Kahn（下图...
Single Line Nested For Loops
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You can use two for loops in same line by using zip function
Code:
list1 = ['Abbas', 'Ali', 'Usman']
list2 = ['Kamran', 'Asgar', 'Hamza', 'Umer']
list3 = []
for i,j in zip(list1,list2):
list3.append(i)
list3.append(j)
print(list3)
Output:
['Abbas', 'Kamran', '...
What's the result of += in C and C++?
... Important: Note that (i+=10)+=10 is undefined behavior in C++, see @aix answer.
– David Rodríguez - dribeas
May 18 '12 at 15:05
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What are .dex files in Android?
...ograms are compiled into .dex (Dalvik Executable) files, which are in turn zipped into a single .apk file on the device. .dex files can be created by automatically translating compiled applications written in the Java programming language.
Dex file format:
1. File Header
2. String Table
3. Clas...
Unit testing code with a file system dependency
I am writing a component that, given a ZIP file, needs to:
11 Answers
11
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How do I install jmeter on a Mac?
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Once you got the ZIP from the download, extract it locally, and with your finder, go in bin directory.
Then double-click on ApacheJMeter.jar to launch the User Interface of JMeter.
This and the next steps are described in a blog entry.
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How to create JSON string in C#
...e",
Password = "my_password",
SourceDir = "/export/zip/mypath/",
FileName = "my_file.zip"
};
//Tranform it to Json object
string json_data = JsonConvert.SerializeObject(my_jsondata);
//Print the Json object
Console.WriteLi...
Interface/enum listing standard mime-type constants
... This is working good until you need a constant for "application/zip". This class doesn't have APPLICATION_ZIP
– naXa
Dec 3 '19 at 17:55
add a comment
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O2O江湖:2015大洗牌 2016 BAT等巨头将“肉搏” - 资讯 - 清泛网 - 专注C/C++及内核技术
...很难继续再融进一轮，而百度阿里如果足够有决心，则会把消耗战尽量拉长，新美大会先撑不住。
目前美团占优的餐饮团购、外卖、电影、酒店等都已然是红海，四面迎敌，具备战略意义但很难盈利，若以长远计，点评占优的...
Unignore subdirectories of ignored directories in Git
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I have a global gitignore file where I ignored all *.zip file. Yet for a particular project, I want to include zip files. I added this line to that project's .gitignore and it works great!: !*.zip
– Jinghao Shi
Mar 21 '15 at 3:44
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