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var htmlText = "<div id='pop' style='background-color:#0000ff;";
htmlText += "position: absolute;"
htmlText += "left: 40%;";
htmlText += "'>";
htmlText += "foobar3333<br><br><br> Hoge </div>";

$("#page").prepend(htmlText);

console.log($('#pop'));

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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db.createUser({ 
  createUser: "<name>",
  pwd: "<cleartext password>",
  customData: { <any information> },
  roles: [
    { role: "dbOwner", db: "demo" } 
  ]
});

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# update ubuntu source
sudo apt-get update

# add sudo user
sudo adduser username
sudo adduser username sudo

# install nvm
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.31.0/install.sh | bash

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let crypto = require('crypto');

function hashString(algorithm, string) {
  return crypto.createHash(algorithm).update(string).digest('hex');
};

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var defaultComparator = function (a, b) {
    return a > b;
};

// 冒泡排序
var bubbleSort = function(arr, comparator) {
    for(var i = 0; i < arr.length; i++) {
        for (var j = 0; j < arr.length - i; j++) {
            if (comparator(arr[j], arr[j + 1])) {
                var temp = arr[j];

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-- create a root user at 192.168.11.0/24
CREATE USER 'root'@'192.168.11.%' IDENTIFIED BY 'some_pass';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;

-- create a replication user
CREATE USER repl_user;
GRANT REPLICATION SLAVE ON *.* TO repl_user IDENTIFIED BY 'some_pass';

-- start reolication on slave
CHANGE MASTER TO MASTER_HOST = 'master', MASTER_PORT = 3306, MASTER_USER = 'repl_user', MASTER_PASSWORD = 'some_pass';

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" Get out of VI's compatible mode
set nocompatible

" Set how many lines of history VIM to remember
set history=400

" Enable filetype plugin
filetype plugin on
filetype indent on

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# If you want to revert changes made to your working copy, do this:
git checkout .

# If you want to revert changes made to the index (i.e., that you have added), do this. Warning this will reset all of your unpushed commits to master!:
git reset

#If you want to revert a change that you have committed, do this:
git revert <commit 1> <commit 2>

# If you want to remove untracked files (e.g., new files, generated files):

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# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048