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// define round
function round(float,precision) { 
    return Math.round(float/precision)/(1/precision);
}
// how to use 

round(0.3-0.2, .001)

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApplication
{
    public class Program
    {

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using System;

namespace ConsoleApplication
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Two the_two = new Two();
            //      协变                       逆变

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#!/bin/bash
apt-get install -y curl unzip

mkdir -p /var/lib/consul
mkdir -p /usr/share/consul
mkdir -p /etc/consul/conf.d

curl -OL https://releases.hashicorp.com/consul/0.7.5/consul_0.7.5_linux_amd64.zip
unzip consul_0.7.5_linux_amd64.zip
mv consul /usr/local/bin/consul

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public class LazyLoad<T>
{
    private readonly Lazy<T> _lazy;
    private T _value;

    public LazyLoad(Func<T> valueFactory)
    {
        _lazy = new Lazy<T>(valueFactory);
    }

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public static class PartialFunction
{
    public static Func<T1,Func<T2,TResult>> Curry<T1,T2,TResult>(Func<T1,T2,TResult> func) => arg1 =>arg2=>func(arg1,arg2);
    public static Func<T1,Func<T2,Func<T3,TResult>>> Curry<T1,T2,T3,TResult>(Func<T1,T2,T3,TResult> func) => arg1=>arg2=>arg3=>func(arg1,arg2,arg3);
    public static Func<T1,Func<T2,Func<T3,Func<T4,TResult>>>> Curry<T1,T2,T3,T4,TResult>(Func<T1,T2,T3,T4,TResult> func) => arg1=>arg2=>arg3=>arg4=>func(arg1,arg2,arg3,arg4);
    public static Func<T1,Func<T2,Func<T3,Func<T4,Func<T5,TResult>>>>> Curry<T1,T2,T3,T4,T5,TResult>(Func<T1,T2,T3,T4,T5,TResult> func) => arg1=>arg2=>arg3=>arg4=>arg5=>func(arg1,arg2,arg3,arg4,arg5);
    public static Func<T1,Func<T2,Func<T3,Func<T4,Func<T5,Func<T6,TResult>>>>>> Curry<T1,T2,T3,T4,T5,T6,TResult>(Func<T1,T2,T3,T4,T5,T6,TResult> func) => arg1=>arg2=>arg3=>arg4=>arg5=>arg6=>func(arg1,arg2,arg3,arg4,arg5,arg6);
    public static Func<T1,Func<T2,Func<T3,Func<T4,Func<T5,Func<T6,Func<T7,TResult>>>>>>> Curry<T1,T2,T3,T4,T5,

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function paramReplace(uri, key, value) {
        // Find the param with regex
        // Grab the first character in the returned string (should be ? or &)
        // Replace our href string with our new value, passing on the name and delimeter

        var re = new RegExp("[\\?&]" + key + "=([^&#]*)");
        var separator = uri.indexOf('?') !== -1 ? "&" : "?";
        var matches = re.exec(uri);
        var newUri;
        if (matches === null) {

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public static string GetMd5String(string input)
{
    using (MD5 md5Hash = MD5.Create())
    {
        // Convert the input string to a byte array and compute the hash.
        byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));

        // Create a new Stringbuilder to collect the bytes
        // and create a string.
        StringBuilder sBuilder = new StringBuilder();

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 public interface ITimerDataSource
{
    TimerTask LastTask();
    void RemoveTask(string taskid);
    void Insert(TimerTask task);
}

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docker images | findstr '<none>' | ForEach-Object{$_.Split(" ",[System.StringSplitOptions]::RemoveEmptyEntries)[2];}| ForEach-Object{docker rmi  $_}