大约有 30,000 项符合查询结果（耗时：0.0541秒） [XML]
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展之：RequestMTU是否有上限？ -...
RequestMTU
没反应,是不是因为这个值1024太大了
1024没触发,64触发了
MTU设64不报错,设100报错 128报错.256不报错.
----
连上后，调用，没有触发回调？
待调查研究这个函数是否有上限。
SQL Server - stop or break execution of a SQL script
Is there a way to immediately stop execution of a SQL script in SQL server, like a "break" or "exit" command?
20 Answers
...
C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...子节点
XmlNodeList childlist=root.ChildNodes;
//判断该节点下是否有子节点
root.HasChildNodes;
//获取同名同级节点集合
XmlNodeList nodelist=xml.SelectNodes("/Root/News");
//生成一个新节点
XmlElement node=xml.CreateElement("News");
//将节点加到指定...
Relative paths in Python
...
@DarraghEnright: That only happens in a Python-script-to-exe packaging environment. That's one of the rare exceptions where relying on the current working dir would be the alternative.
– Martijn Pieters♦
May 12 '18 at 18:56
...
AtomicInteger lazySet vs. set
...rve as a soft barrier costing 20 cycles on nehelem intel cpu)
on x86 (x86_64) such a barrier is much cheaper performance-wise than volatile or AtomicLong getAndAdd ,
In an one producer, one consumer queue scenario, xchg soft barrier can force the line of codes before the lazySet(sequence+1) for p...
Is volatile expensive?
...ec3: add $0x8,%esp
0xb396cec6: pop %ebp
0xb396cec7: test %eax,0xb7732000 ; {poll_return}
;... lines removed
If you look at the 2 references to getstatic, the first involves a load from memory, the second skips the load as the value is reused from the register(s) it is already loaded i...
How to convert an array of strings to an array of floats in numpy?
...port numpy as np
a = ["1.1", "2.2", "3.2"]
b = np.asarray(a, dtype=np.float64, order='C')
For Python 2*:
print a, type(a), type(a[0])
print b, type(b), type(b[0])
resulting in:
['1.1', '2.2', '3.2'] <type 'list'> <type 'str'>
[1.1 2.2 3.2] <type 'numpy.ndarray'> <type 'num...
Entity Framework vs LINQ to SQL
...is well designed
Mapping can be changed without recompilling with SqlMetal.exe
.dbml (Database Markup Language)
One-to-one mapping between tables and classes
Supports TPH inheritance
Doesn't support complex types
Storage-first approach
Database-centric view of a database
Created by C# team
Supported...
How do I create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office?
...64? I am pretty sure Jet only works if your app is compiled or running in 32-bit mode.
– Lamar
Sep 30 '08 at 1:45
2
...
How do I import the javax.servlet API in my Eclipse project?
...le and extracting it is sufficient. In case of Tomcat, do not download the EXE format, that's only for Windows based production environments. See also a.o. Several ports (8005, 8080, 8009) required by Tomcat Server at localhost are already in use.
A servletcontainer is a concrete implementation of t...