大约有 20,400 项符合查询结果（耗时：0.0372秒） [XML]
Why doesn't indexOf work on an array IE8?
The below function works fine on Opera, Firefox and Chrome. However, in IE8 it fails on the if ( allowed.indexOf(ext[1]) == -1) part.
...
What is causing this ActiveRecord::ReadOnlyRecord error?
This follows this prior question, which was answered. I actually discovered I could remove a join from that query, so now the working query is
...
Preserve Line Breaks From TextArea When Writing To MySQL
I'm using a textarea to enable users to input comments. However, if the users enters new lines, the new lines don't appear when they are outputted. Is there any way to make the line breaks stay.
...
Bash/sh - difference between && and ;
I normally use ; to combine more than one command in a line, but some people prefer && . Is there any difference? For example, cd ~; cd - and cd ~ && cd - seems to make the same thing. What version is more portable, e.g. will be supported by a bash-subset like Android's shell ...
Context switches much slower in new linux kernels
We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to belie...
Is there anything like .NET's NotImplementedException in Java?
Is there anything like .NET's NotImplementedException in Java?
5 Answers
5
...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 MQTT...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
... 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库...
How do I use CSS in Django?
I am creating my application using Django, and am wondering how I can make Django use my CSS file? What settings do I need to do to make Django see the css file?
...
如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
如何选择机器学习算法Choosing-a-Machine-Learning-Classifier如何针对某个分类问题决定使用何种机器学习算法？ 当然，如果你真心在乎准确率，最好的途径就是测试一大堆各式各样的算法（同时确保在每个算法上也测试不同的参数），...