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创业者只需要一种素质：成为某个领域的意见领袖 - 资讯 - 清泛网 - 专注C/C...
...发产品的那个阶段，要在6个月里坚持不懈，克服困难，把自己的梦想变为现实，别说那些高精尖的科技产品，就像小零食这样的产品，笔者就看到一位创业的朋友用了半年时间才把它上线。
上线之后呢，是不是该歇歇了，稍有...
Send attachments with PHP Mail()?
...unks
$attachment = chunk_split(base64_encode(file_get_contents('attachment.zip')));
//define the body of the message.
ob_start(); //Turn on output buffering
?>
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: multipart/alternative; boundary="PHP-alt-<?php echo $random_hash; ?&...
Some built-in to pad a list in python
...ler's answer is nicer, but if you need a builtin, you could use itertools.izip_longest (zip_longest in Py3k):
itertools.izip_longest( xrange( N ), list )
which will return a list of tuples ( i, list[ i ] ) filled-in to None. If you need to get rid of the counter, do something like:
map( itertool...
How to generate a core dump in Linux on a segmentation fault?
...n fault and shells out to a debugger (this is the original code used under AIX) and prints the stack trace up to the point of a segmentation fault. You will need to change the sprintf variable to use gdb in the case of Linux.
#include <stdio.h>
#include <signal.h>
#include <stdlib.h&...
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
...
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 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
...
How do I install jmeter on a Mac?
...
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.
...
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...