hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

laszlomiklosik

# no 64 bit version of the flash debug player is available, thus we will use the 32 bit version and use nspluginwrapper to make it work

sudo killall -9 firefox
sudo apt-get remove -y --purge flashplugin-nonfree gnash gnash-common mozilla-plugin-gnash swfdec-mozilla libflashsupport nspluginwrapper
sudo rm -f /usr/lib/mozilla/plugins/*flash*
sudo rm -f ~/.mozilla/plugins/*flash*
sudo rm -f /usr/lib/firefox/plugins/*flash*
sudo rm -f /usr/lib/firefox-addons/plugins/*flash*
sudo apt-get install ia32-libs nspluginwrapper libcurl3 libnss3-1d libnspr4-0d
cd ~

iheanyi

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

wen-long

##ss-redir 的 iptables 配置(透明代理)

透明代理指对客户端透明，客户端不需要进行任何设置就使用了网管设置的代理规则

创建 /etc/ss-redir.json 本地监听 7777 运行ss-redir -v -c /etc/ss-redir.json

iptables -t nat -N SHADOWSOCKS
# 在 nat 表中创建新链
iptables -t nat -A SHADOWSOCKS -p tcp --dport 23596 -j RETURN
# 23596 是 ss 代理服务器的端口，即远程 shadowsocks 服务器提供服务的端口，如果你有多个 ip 可用,但端口一致，就设置这个

fqrouter

	resolver 8.8.8.8;
	location /video/ {
                if ($request_uri ~ "^/video/(.+?)/.+") {
                        set $upstream_host $1.googlevideo.com;
                        add_header Content-Disposition "attachment; filename=video.mp4;";
                }
                rewrite /video/.+?/(.+)$ /$1 break;
                proxy_buffering off;
                proxy_pass https://$upstream_host;
                proxy_set_header Host $upstream_host;

VladSumtsov

import java.util.List;

public interface DiskCache<T> {

    /**
     * Sets the value to {@code value}.
     */
    public void set(String key, T value);

    /**

Tombarr

package me.barrasso.android.volume.ui;

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0

jlln

def splitDataFrameList(df,target_column,separator):
    ''' df = dataframe to split,
    target_column = the column containing the values to split
    separator = the symbol used to perform the split

    returns: a dataframe with each entry for the target column separated, with each element moved into a new row. 
    The values in the other columns are duplicated across the newly divided rows.
    '''
    def splitListToRows(row,row_accumulator,target_column,separator):
        split_row = row[target_column].split(separator)

andhie

public static void printPermissions(Context context) {
    PackageInfo android;
    try {
        android = context.getPackageManager().getPackageInfo("android", PackageManager.GET_PERMISSIONS);
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        return;
    }

    PermissionInfo[] permissions = android.permissions;

artzub

#!/bin/bash

apt-get install mc htop git unzip wget curl -y

echo
echo "====================================================="
echo "                     WELCOME"
echo "====================================================="
echo
echo "Hub"