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Postgres - FATAL: database files are incompatible with server
...ta and get a fresh database), you can do:
rm -rf /usr/local/var/postgres && initdb /usr/local/var/postgres -E utf8
and then you'll need to rake db:setup and rake db:migrate from your Rails app to get setup again.
s...
Can a C# class inherit attributes from its interface?
...uplication), but it is only valid for property and indexer usage.
As an example:
using System;
using System.ComponentModel;
class Foo {
[AttributeProvider(typeof(IListSource))]
public object Bar { get; set; }
static void Main() {
var bar = TypeDescriptor.GetProperties(typeof(F...
How to format a floating number to fixed width in Python
How do I format a floating number to a fixed width with the following requirements:
7 Answers
...
Implement C# Generic Timeout
...o a local variable in the method that created the lambda.
I submit this example, for your enjoyment. The method you are really interested in is CallWithTimeout. This will cancel the long running thread by aborting it, and swallowing the ThreadAbortException:
Usage:
class Program
{
static v...
How to use arguments from previous command?
... the previous commands (arg 0). Similarly Alt-- then repeating Alt-. would allow you to step through the previous next-to-last arguments.
If there is no appropriate argument on a particular line in history, the bell will be rung.
If there is a particular combination you use frequently, you can def...
What is the leading LINQ for JavaScript library? [closed]
I'm looking for a JavaScript library that will allow me to query complex JSON objects using a LINQ-like syntax. A quick search found a couple of promising options that look they might offer what I need:
...
How can I use if/else in a dictionary comprehension?
...
@Marcin's answer covers it all, but just in case someone wants to see an actual example, I add two below:
Let's say you have the following dictionary of sets
d = {'key1': {'a', 'b', 'c'}, 'key2': {'foo', 'bar'}, 'key3': {'so', 'sad'}}
and you want ...
中文网（自研/维护）拓展 · App Inventor 2 中文网
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属性
事件
方法
FlashLight
属性
事件
方法
MyListView
属性
事件
方法
MyListViewElement
属...
module.exports vs exports in Node.js
... @ajostergaard: It just happens to be the name of the library the OP's example was taken from. In the module, it allows the author to write things like nano.version = '3.3' instead of module.exports.version = '3.3', which reads a little more clearly. (Note that nano is a local variable, declared...
BLE &APP交互学习教程01——下发指令 - 创客硬件开发 - 清泛IT社区，为创新赋能！
BLE模块性价比高，无需配对就可以连接使用，从本节开始，我们着重来学习使用BLE控制和显示。
1.界面设计
2.逻辑设计
3.APP工程
4.下位机工程
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