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AppInventor2拍照的照片Base64编码报错，选择的图片没有问题 - App应用开发...
... fis为空
然后后用用null.compress 报错了
我用FileTool那个插件 现把文件拷贝出来 然后再调用 就可以了。
具体实现步骤是什么那个文件工具peien 发表于 2024-09-18 02:28
具体实现步骤是什么那个文件工具
FileTools 拓展：https://www...
BLE数据收发 20个字节的限制问题 - 创客硬件开发 - 清泛IT社区，为创新赋能！
请问BLE插件只支持20个字节的数据接收与发送吗，我尝试超过20个字节就会自动忽略掉后面的字节
【待研究】web客户端组件能不能获取post服务器返回的响应头数据？ - App应...
...类型和响应内容选项。
如果不能，有可以获取响应头的插件推荐没？
感谢。
问题来源：QQ群。原生组件上面的方法肯定是没办法获取响应头数据了，有没有拓展待研究。经验证，保存响应到文件，也不包含响应头信息（只...
MySQL: Order by field size/length
...
SELECT * FROM TEST ORDER BY LENGTH(description) DESC;
The LENGTH function gives the length of string in bytes. If you want to count (multi-byte) characters, use the CHAR_LENGTH function instead:
SELECT * FROM TEST ORDER BY...
Java: notify() vs. notifyAll() all over again
...and the difference between these methods right), only one thread is always selected for further monitor acquisition.
That is not correct. o.notifyAll() wakes all of the threads that are blocked in o.wait() calls. The threads are only allowed to return from o.wait() one-by-one, but they each will...
How do I specify a pointer to an overloaded function?
...putIterator, InputIterator, UnaryFunction );
Template deduction needs to select a type for UnaryFunction at the point of the call. But f doesn't have a specific type - it's an overloaded function, there are many fs each with different types. There is no current way for for_each to aid the template...
Remove characters from C# string
... where char.IsWhiteSpace(c) || char.IsLetterOrDigit(c)
select c
).ToArray());
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How to use GROUP BY to concatenate strings in SQL Server?
...S (1,'B',8)
INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (2,'C',9)
SELECT
[ID],
STUFF((
SELECT ', ' + [Name] + ':' + CAST([Value] AS VARCHAR(MAX))
FROM #YourTable
WHERE (ID = Results.ID)
FOR XML PATH(''),TYPE).value('(./text())[1]','VARCHAR(MAX)')
,1,2,'') AS NameVa...
How can I reliably determine the type of a variable that is declared using var at design time?
...o resolve the type. For instance:
var items = myList.OfType<Foo>().Select(foo => foo.Bar);
The return type is IEnumerable<Bar>, but resolving this required knowing:
myList is of type that implements IEnumerable.
There is an extension method OfType<T> that applies to IEnume...
LINQ: “contains” and a Lambda query
...Here is how you can use Contains to achieve what you want:
buildingStatus.Select(item => item.GetCharValue()).Contains(v.Status) this will return a Boolean value.
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