hoyangtsai

#!/bin/bash

IP=`ifconfig | grep "inet " | grep -v 127.0.0.1 | cut -d\  -f2`
echo "$IP"

hoyangtsai

// use ES6 unshift
TheArray.unshift(TheNewElement);

// use splice
TheArray.splice(0, 0, TheNewElement);

hoyangtsai

Array.prototype.diff = function(a) {
    return this.filter(function(i) {return a.indexOf(i) < 0;});
};

hoyangtsai

const arr1 = [3, 5, 6, 10, 11, 20];
const arr2 = [1, 2, 7, 8, 15, 19];

mergeTwo(arr1, arr2); // [1, 2, 3, 5, 6, 7, 8, 10, 11, 15, 19, 20]

// First Approach
// O(n log n) time & O(n) space
function mergeTwo(arr1, arr2) {
  let result = [...arr1, ...arr2];
  return result.sort((a,b) => a-b);

hoyangtsai

const arr = [1,2,3,4,5];

// Spread Operator  
const arr1 = [...arr];

// Slice Operator
const arr2 = arr.slice();

// Concat
const arr3 = [].concat(arr)

hoyangtsai

// 1. Use .toString()
['a', 'b', 'c'].toString(); // 'a,b,c'

// 2. Coerce to string
['a', 'b', 'c'] + []; // 'a,b,c'
['a', 'b', 'c'] + ''; // 'a,b,c'

// 3. Use .join()
['a', 'b', 'c'].join(); // 'a,b,c' (defaults to ',' separator)
['a', 'b', 'c'].join(''); // 'abc'

hoyangtsai

// use Set
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];

let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'

// use Filter
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];

let x = (names) => names.filter((v,i) => names.indexOf(v) === i)

hoyangtsai

function range(start, edge, step) {
  // If only one number was passed in make it the edge and 0 the start.
  if (arguments.length == 1) {
    edge = start;
    start = 0;
  }
 
  // Validate the edge and step numbers.
  edge = edge || 0;
  step = step || 1;

hoyangtsai

// register an application
// https://api.imgur.com/oauth2/addclient

// get registered apps info
// https://imgur.com/account/settings/apps

const imgur = require('imgur');

imgur.setClientId(`${CLIENT_ID}`);

hoyangtsai

#!/bin/sh
export DISPLAY=:0
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
./bfgminer --scrypt --url=stratum+tcp://litecoinpool.org:3333 --userpass=h0yang.1:1 --url=stratum+tcp://us.litecoinpool.org:3333 --userpass=h0yang.1:1 --failover-only