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Modbus硬件控制03——485串口助手控制继电器 - 创客硬件开发 - 清泛IT社区...
...，自带CRC校验，非常易于使用。
2.硬件连接
通过USB转485接入PC
3.测试步骤
发送字符串，一共两条指令
第一条是闭合继电器
第二条是断开继电器
如何获取IE (控件)的所有链接（包括Frameset, iframe） - 其他 - 清泛IT社...
...点通过IHTMLElement->get_all 方法无法获取iframe 里面的节点列表：
CComPtr<IHTMLElement> body;
...
CComPtr<IDispatch> spDispCollection;
body->get_all(&spDispCollection);复制代码所以要获取iframe/frame(frameset) 里面的节点列表的话, 则需要根据b...
SHFileOperation函数总结（文件夹的移动、复制、删除） - C/C++ - 清泛网 -...
...E：要求SHFileOperation()函数返回正处于操作状态的实际文件列表，文件列表名柄保存在hNameMappings成员中。
SHFILEOPSTRUCT结构还包含一个SHNAMEMAPPING结构的数组，此数组保存由SHELL计算的每个处于操作状态的文件的新旧路径。
...
Identifying and removing null characters in UNIX
... I had to use the following invocation to get a backup file called example.csv.bak: sed -i.bak 's/\x0//g' example.csv
– Andrew Keeton
Jan 22 at 18:21
...
A method to reverse effect of java String.split()? [duplicate]
...ackage.
import java.util.Arrays;
...
String delim = ":",
csv_record = "Field0:Field1:Field2",
fields[] = csv_record.split(delim);
String rebuilt_record = Arrays.toString(fields).replace(", ", delim).replaceAll("[\\[\\]]", "");
...
C/C++中退出线程的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...清除没有发生，即C++对象撤消函数没有被调用，数据没有转至磁盘等等。
5、线程终止运行时发生的操作
当线程终止运行时，会发生下列操作：
（1）线程拥有的所有用户对象均被释放。在Windows中，大多数对象是由包含创...
How Do I Use Factory Girl To Generate A Paperclip Attachment?
...l_file { File.new("#{Rails.root}/spec/fixtures/personal_files/my_test_file.csv") }
personal_file_content_type 'text/csv'
end
end
And add these lines to theconfig/environemnts/test.rb :
config.paperclip_defaults = {
url: "#{Rails.root}/spec/fixtures/:attachment/:filename",
use_timestamp...
What is the difference between NaN and None?
I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
Select first 4 rows of a data.frame in R
...we have the following dataset with 15 rows
>data <- data <- read.csv("./data.csv", sep = ";", header=TRUE)
>data
LungCap Age Height Smoke Gender Caesarean
1 6.475 6 62.1 no male no
2 10.125 18 74.7 yes female no
3 9.550 16 69.7 no female ...
Run a string as a command within a Bash script
...lude server::team_l_start = ${teamAComm} server::team_r_start=${teamBComm} CSVSaver::save='true' CSVSaver::filename = 'out.csv'
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