AoiYamada

'use strict';

/**
 * Deep object flattener
 * flatten an object, the message will be pull out, array index/nested key will be chained to be a new key.
 * @param {object} obj - the target object
 * @param {string} [prefix = ''] - the prefix of each key
 * @return {object} flattened object
 */
function deepFlatten(obj, prefix = '') {

AoiYamada

/**
 * @param {Function} fn - The function wanted to be currified
 * @return {Function} a currified function
 */
function curry(fn) {
    return curryHelper(fn);
}

// private helper, not expose to client
function curryHelper(fn, memory = [], ...args) {

AoiYamada

/**
 * Transform CSV to a 2D array
 * @param {String} csvString
 * @param {String} [separator=,]
 *
 */
function csvToArray(csvString, separator = ',') {
    const sRegExp = new RegExp(`(^"|${separator}"|{linebreak}")(.*?)("${separator}|"{linebreak}|"$)`, 'g'); // matching field contents
    return csvString
        .replace(/\r/g, '') // remove part of window linebreak symbols

AoiYamada

function isBalanced(val) {
    if(val.length) {
        // strip off the nestest braces
        const replaced_val = replaceBraces(val);
        if(val === replaced_val)
            return 'NO';
        else
            return isBalanced(replaced_val);
    } else {
        return 'YES';

AoiYamada

Certbot auto renew SSL guideline for CentOS 6, 7

Sign a ssl cert and renew by cronjob.

Prerequisite

softwares:

• wget
• nginx
• nano

AoiYamada

/**
 * Remove html tag, css, js of html string to extract the contents
 * @param {String} html
 * @return {String} contents of the html
 */
function extractContents(html) {
    return html
        .replace(/(\n|\r|\t)/gm, '') // remove linebreaks
        .replace(/<(style|script|link|noscript).*?>.*?<\/(style|script|link|noscript)>/g, '') // remove css, js blocks
        .replace(/<!--.*?-->/g, '') // remove comments

AoiYamada

class Counting extends Array {
    constructor(...items) {
        if (items.length > 1) super(...items);
        else {
            super();
            this.push(...items);
        }
    }
    swap(idx1, idx2) {
        const length = this.length;

AoiYamada

// http://imweb.io/topic/59dc5a8b856028aa249e2a58
// https://segmentfault.com/a/1190000006930013
// 總之，IE真的是毒瘤...
{
  "presets": [
    ["es2015",
    {
      "loose": true
    }],
    "stage-0"

AoiYamada

#!/bin/bash

while read oldrev newrev ref
do
  branch=`echo $ref | cut -d/ -f3`

  if [ "master" == "$branch" ]; then
    git --work-tree=./path/under/root/dir/live-site/ checkout -f $branch
    echo 'Changes pushed live.'
  fi

AoiYamada

SELECT * FROM singers LIMIT 5;
SELECT * FROM songs WHERE singer_id = 1;
SELECT * FROM songs WHERE singer_id = 2;
SELECT * FROM songs WHERE singer_id = 3;
SELECT * FROM songs WHERE singer_id = 4;
SELECT * FROM songs WHERE singer_id = 5;