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let a = 1
let b = 1
let count = 0

while (a <= 20) {
  while (b <= 20) {
    if (((a * 2 + b) <= 20) && a * 2 > b && a !== b) {
      console.log(`發現等邊三角形 | 三邊長分別為: ${a}、${a}、${b}`)
      count++
    }

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function isInValidTriangle (a, b, c) {
  const result = !((a+b)>c) || !((b+c)>a) || !((c+a)>b) ||
   !((a-b)<c) || !((b-a)<c) || !((b-c)<a) || !((c-b)<a) ||!((c-a)<b) ||
   !((a-c)<b) || !(a>0) || !(b>0) || !(c>0)
  return result
}

if (isInValidTriangle(a, b, c)) {
  console.log ('invalid')  
} else if (a===b && b===c) {

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if (isValidTriangle(a, b, c)) {
  if (a === b && b === c) {
    console.log("是等邊三角形!")
  } else if (a === b || b === c || a === c) {
    console.log("是等腰三角形!")
  } else {
    console.log("是不等邊三角形!")
  }
} else {
  console.log("Invalid! (無法組成有效三角形) ")

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var flags = [
  {
    "code": "Afghanistan",
    "name": "Afghanistan",
    "img": "https://lipis.github.io/flag-icon-css/flags/4x3/af.svg"
  },
  {
    "code": "Aland Islands",
    "name": "Aland Islands",
    "img": "https://lipis.github.io/flag-icon-css/flags/4x3/ax.svg"

WeiChiaChang

// Reference:
// https://github.com/Rob--W/cors-anywhere

// Listen on a specific host via the HOST environment variable
var host = process.env.HOST || '0.0.0.0';
// Listen on a specific port via the PORT environment variable
var port = process.env.PORT || 8081;

var cors_proxy = require('cors-anywhere');
cors_proxy.createServer({

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let imageLinks = []

const async = require('async')
let fs = require('fs')
let request = require('request')
let path = require('path')

const downloadImage = (src, dest, callback) => {
  request.head(src, (err, res, body) => {
    if (err) { console.log(err); return }

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<template>
  <div class="zoomer" ref="zoomer" @mousemove="moveBG" @mouseout="mouseOut">
    <div class="img normal v-fade"
      v-show="!hoverNow"
      :style="{
        backgroundImage: `url(${imgNormal})`
      }"
    ></div>
    <div
      v-show="hoverNow"

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Open command prompt (Terminal) and run:

ffmpeg -i "filename.flv" -vcodec copy -acodec copy "filename.mp4"

This will copy video track and audio track from filename.flv to filename.mp4. The operation is lossless (there is no quality loss).

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/*
 * Easing Functions - inspired from http://gizma.com/easing/
 * only considering the t value for the range [0, 1] => [0, 1]
 */
EasingFunctions = {
  // no easing, no acceleration
  linear: function (t) { return t },
  // accelerating from zero velocity
  easeInQuad: function (t) { return t*t },
  // decelerating to zero velocity

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html {
    background: url(image url) no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    height: 100%;
    overflow: hidden;
}