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App Inventor 2 低功耗蓝牙 BlueToothLE 拓展 · App Inventor 2 中文网
...uuid和特征uuid 发送 / 接收 数据。
广播
现在常规便宜芯片并无蓝牙协议栈，只能通过人工拼包用最简单的蓝牙广播方式通信，可以做到手机与设备进行简单的交互。
无连接的
是单向的，可以向任何人或者接收器发送数据...
Difference between JSON.stringify and JSON.parse
...r employee = { "name": "John Johnson", "street": "Oslo West 16", "phone": "555 1234567" };
//use JSON.stringify to convert it to json string
var jsonstring = JSON.stringify(employee);
$("#result").append('<p>json string: ' + jsonstring + '</p>');
//conve...
How to check if a float value is a whole number
...is_integer() method:
>>> (1.0).is_integer()
True
>>> (1.555).is_integer()
False
The method was added to the float type in Python 2.6.
Take into account that in Python 2, 1/3 is 0 (floor division for integer operands!), and that floating point arithmetic can be imprecise (a floa...
How to merge a transparent png image with another image using PIL
...
The secret sauce was tasty
– AFP_555
Apr 15 '18 at 0:06
4
@DenizOzger To fix ...
Get names of all files from a folder with Ruby
...
555
You also have the shortcut option of
Dir["/path/to/search/*"]
and if you want to find all ...
Checkboxes in web pages – how to make them bigger?
...0px;
background:white;
border-radius:5px;
border:2px solid #555;
}
input[type='checkbox']:checked {
background: #abd;
}
<input type="checkbox" />
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Is there any sed like utility for cmd.exe? [closed]
...D]', 'MyValue') | Set-Content c:\temp\test.txt
– AFP_555
May 3 '19 at 15:44
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...
A simple explanation of Naive Bayes Classification
....3333333333333333,
'fair': 0.7777777777777778,
'medium': 0.5555555555555556,
'yes': 0.7777777777777778
}
}
Result:
yes ==> 0.0720164609053
no ==> 0.0411428571429
Hope it helps in better understanding the problem
peace
...
How to round float numbers in javascript?
...
555
Number((6.688689).toFixed(1)); // 6.7
...
Making a Sass mixin with optional arguments
...sing all needed args:
.my-box-shadow {
@include box-shadow(2px 2px 5px #555, inset 0 0 0);
}
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