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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...nning on a NUMA machine. We suggest launching mongod like this to avoid performance problems: numactl –interleave=all mongod [other options]
当时我并不太清楚NUMA是什么东西，所以没有处理，只是把问题反馈给了运维人员，后来知道运维人员也没有理会这...
Is it possible to implement dynamic getters/setters in JavaScript?
I am aware of how to create getters and setters for properties whose names one already knows, by doing something like this:
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创建自定义 TinyWebDB 服务 · App Inventor 2 中文网
...y in a database on the web. Because the data is stored on the web instead of a particular phone, TinyWebDB can be used to facilitate communication between phones and apps (e.g., multi-player games).
By default, the TinyWebDB component stores data on a test service provided by App Inventor, http://t...
Is .NET/Mono or Java the better choice for cross-platform development? [closed]
How much less libraries are there for Mono than for Java?
15 Answers
15
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micro:bit 微控制器教程 · App Inventor 2 中文网
...左转
右箭头：右转
// 按钮按下时发送指令
when Button_Forward.TouchDown
do
call BluetoothLE1.WriteRXCharacteristic "F\n"
when Button_Backward.TouchDown
do
call BluetoothLE1.WriteRXCharacteristic "B\n"
// 按钮释放时停止
when anyButton.TouchUp
do
call BluetoothL...
How do I convert NSInteger to NSString datatype?
...u cast them to long, in order to match the current 64-bit architectures' definition:
NSString *inStr = [NSString stringWithFormat: @"%ld", (long)month];
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Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
...rough Alex Ott's guide to CEDET and other threads about tags in StackOverflow, but I am still confused about how Emacs interfaces with these different tag systems to facilitate autocompletion, the looking up of definitions, navigation of source code base or the previewing of doc-strings.
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将 App Inventor 2 项目连接到外部传感器 · App Inventor 2 中文网
...部传感器
Note: This report describes work carried out in Spring 2014 for an Undergraduate Advanced Project in the MIT Department of Electrical Engineering and Computer Science. Funding to support this work was provided by Google ATAP
Introduction
App Inventor is a visual “blocks” based l...
What part of Hindley-Milner do you not understand?
I swear there used to be a T-shirt for sale featuring the immortal words:
6 Answers
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Undo git mv (rename)
...
Non-cheeky answer:
git mv file2 file1
Updates the index for both old and new paths automatically.
Check documentation of git mv
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