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BLE（三）APP开发步骤 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...后，便可对attributes（属性，参考前面的BLE协议栈）进行读写。利用getService、getCharacteristics获取外围设备的service和characteristic，对于其中支持写的characteristic在写入相应的数据，可实现外围设备的控制
了解BLE app的开发步骤后，...
AsciiConversion 拓展问题：字母开头的会出现“C2”非预期字符 - App Inven...
...结构，使用拓展可以实现：UrsAI2ByteArray 字节数组扩展：读写二进制数据 - App Inventor 2 拓展
2、字符串模式下，使用Ascii拓展将二进制列表转换成字符串再发送，当二进制为0~127时，能够正常转换发送并还原二进制值，但是 >127...
Heatmap in matplotlib with pcolor?
... np
%pylab inline
page = urlopen("http://datasets.flowingdata.com/ppg2008.csv")
nba = pd.read_csv(page, index_col=0)
# Normalize data columns
nba_norm = (nba - nba.mean()) / (nba.max() - nba.min())
# Sort data according to Points, lowest to highest
# This was just a design choice made by Yau
# in...
Sorting a Python list by two fields
I have the following list created from a sorted csv
7 Answers
7
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How do I get a consistent byte representation of strings in C# without manually specifying an encodi
...tring data = "A string with international characters: Norwegian: ÆØÅæøå, Chinese: 喂 谢谢";
var bytes = System.Text.Encoding.UTF8.GetBytes(data);
var decoded = System.Text.Encoding.UTF8.GetString(bytes);
Don't reinvent the wheel if you don't have to...
...
How to add “active” class to Html.ActionLink in ASP.NET MVC
...t groups them together in a logical manner.
– René Kåbis
Apr 28 '16 at 18:29
@René Kåbis it for bootstrap naigatio...
Read file from line 2 or skip header row
...
If you want to read multiple CSV files starting from line 2, this works like a charm
for files in csv_file_list:
with open(files, 'r') as r:
next(r) #skip headers
rr = csv.reader(r)
...
App Inventor 2 数学积木的9个隐藏用法：随机种子、位运算、取整陷阱，踩中...
...一个预设的掩码列表 [1, 2, 4, 8, 16, ...] 就能实现任意位的读写。
把二进制第 N 位改为 1：用原值和掩码做按位或。
把第 N 位改为 0：用原值和掩码取反后做按位与。
这套方法在蓝牙通信、IoT 硬件控制、串口协议解析中极为...
How to implement a confirmation (yes/no) DialogPreference?
... answered Jan 4 '13 at 7:58
XåpplI'-I0llwlg'I -XåpplI'-I0llwlg'I -
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...
How can foreign key constraints be temporarily disabled using T-SQL?
...NT ' + const.const_name + ' FOREIGN KEY (
' + const.parent_col_csv + '
) REFERENCES ' + const.ref_obj + '(' + const.ref_col_csv + ')
GO'
FROM (
SELECT QUOTENAME(fk.NAME) AS [const_name]
,QUOTENAME(schParent.NAME) + '.' + QUOTENAME(OBJECT_name(fkc.parent_object_id)...