// SeismoGRAPH: Bitmap NUU to PNG
// Scripted by TOMYSSHADOW
// Version 1.1.0
var loggingEnabled = false;
// When a user uploads a file, or if the user refreshes the page and a file is still loaded, send it to a variable.
function NUU2PNG() {
var files = null;
if (!!document.getElementById("NUU").files[0]) {
files = document.getElementById("NUU").files;
}
function setFiles(e) {
e=e||event;
files = e.target.files;
if (!!((cvs = document.getElementById("NUUcanvas")) && (ctx = cvs.getContext("2d")))) {
cvs.style.visibility = "hidden";
} else {
window.alert("Your browser does not support the HTML5 canvas element.");
}
}
// Draw as NUU, the way the format is on the CD. It also can draw the image to the canvas while it's hidden and use that to save it as a PNG.
this.drawNUU = function(save) {
if (!!files) {
for (i=0;i<files.length;i++) {
var NUUReader = new FileReader();
// the file takes a while to upload so you have to do this.
// files[i] which exists because of the for loop, looping through each uploaded file, is passed into this onload function
// as well as the save variable, as the actual desicion is made later
NUUReader.onload = (function(file, save) {
// I don't know why but this needs to be here to work
return function(e) {
e=e||event;
// with DataStream.js
var NUUDataStream = new DataStream(e.target.result);
// this is always big endian afaik but hey that's just a theory a FILE FORMAT THEORY
NUUDataStream.endianness = false;
if (!!((cvs = document.getElementById("NUUcanvas")) && (ctx = cvs.getContext("2d")))) {
// if the user just wants to save this image out to PNG, don't show the canvas
if (!save) {
cvs.style.visibility = "visible";
} else {
cvs.style.visibility = "hidden";
}
// width
var width = parseInt(document.getElementById("width").value);
var height = parseInt(document.getElementById("height").value);
if (!width || !height) {
window.alert("Please enter the width and height of the image.");
return;
}
var bitdepth = document.getElementById("bitdepth").selectedIndex;
var hasalpha = bitdepth == 4;
// it would seem alpha values are reversed if every alpha value is transparent
var reversealpha = true;
// for bits
var bit = 0;
// length of next literal run or run length
var len = 0;
// variable to contain colour for RLE
var rgbColour = 0;
// array containing rgba
var rgbColours = new Array(new Array(), new Array(), new Array(), new Array());
// for rendering the image to the canvas, the current position
var x = 0;
var y = 0;
// the channel we're dealing with
var channel = 0;
// the length of the current line, which will help us determine which channel we're dealing with
var i = 0;
// loop through the rest of the file, taking each colour, breaking it down into RGB and drawing each pixel to the canvas
while (!NUUDataStream.isEof()) {
len = NUUDataStream.readUint8();
switch (bitdepth) {
case 0:
for(var j=0;j<8;j++) {
bit = ((len & (1 << (7 - j))) >> (7 - j));
!loggingEnabled||console.log("Raw - len " + len + " - bit " + bit);
rgbColours[0].push(bit?255:0);
}
break;
default:
var widthFix = (((bitdepth==1||bitdepth==2)&&width%2)?width-1:width);
if (0x101 - len - (bitdepth == 1 || bitdepth == 2) > 0x7F) {
// literal run
len++;
!loggingEnabled||console.log("LR - channel " + channel + " - len " + len);
for(var j=0;j<len;j++) {
if(NUUDataStream.isEof()){break;}
// continually read the next colours for this channel
rgbColour = NUUDataStream.readUint8();
if (hasalpha && reversealpha && !channel && rgbColour) {
reversealpha = false;
}
rgbColours[channel].push(rgbColour);
// once we've found the value for all pixels in the line for this channel, move to next channel
if (++i >= widthFix) {
channel = (++channel % (3 + hasalpha));
i=0;
}
}
} else {
// run length encoding
len = 0x101 - len;
!loggingEnabled||console.log("RLE - channel " + channel + " - len " + len);
if(NUUDataStream.isEof()){break;}
// read the next colour for this channel once, then repeat it len times
rgbColour = NUUDataStream.readUint8();
if (hasalpha && reversealpha && !channel && rgbColour) {
reversealpha = false;
}
for(var j=0;j<len;j++) {
rgbColours[channel].push(rgbColour);
// once we've found the value for all pixels in the line for this channel, move to next channel
if (++i >= widthFix) {
channel = (++channel % (3 + hasalpha));
i=0;
}
}
}
}
}
if (!bitdepth) {
rgbColours[1] = rgbColours[2] = rgbColours[0];
}
//!loggingEnabled||console.log(rgbColours);
cvs.width = width;
// any channel - they should be the same length
cvs.height = height;
//cvs.height = Math.ceil(Math.min(rgbColours[0].length, rgbColours[1].length, rgbColours[2].length, rgbColours[3].length) / width);
for(var j=0,len2=Math.min(rgbColours[0].length, rgbColours[1].length, rgbColours[2].length);j<len2;j++) {
// sometimes I think alpha is reversed where 0 means opaque and 255 means transparent?
if (reversealpha) {
rgbColours[0][j] = 255 - rgbColours[0][j];
}
ctx.fillStyle = "rgba(" + (rgbColours[0 + hasalpha][j]) + ", " + (rgbColours[1 + hasalpha][j]) + ", " + (rgbColours[2 + hasalpha][j]) + ", " + (hasalpha?rgbColours[0][j]:255) + ")";
// paint the current pixel
ctx.fillRect(x, y, 1, 1);
x++;
if (x >= width) {
y++;
x = 0;
}
// these files have no metadata
if (y >= height/* && document.getElementById("useRealHeight").checked*/) {
break;
}
}
if (save) {
var link = document.createElement('a');
link.href = cvs.toDataURL("image/png");
link.setAttribute('download', file.name + ".PNG");
document.getElementsByTagName("body")[0].appendChild(link);
// Firefox
if (document.createEvent) {
var event = document.createEvent("MouseEvents");
event.initEvent("click", true, true);
link.dispatchEvent(event);
}
// IE
else if (link.click) {
link.click();
}
link.parentNode.removeChild(link);
}
} else {
window.alert("Your browser does not support the HTML5 canvas element.");
}
};
})(files[i], save);
NUUReader.readAsArrayBuffer(files[i]);
// in the case that multiple files are chosen we can't draw more than one
// however, if the user wants to convert files we can do more than one at once
if (i + 1 != files.length && !save) {
window.alert("You chose more than one file but only the first one will be drawn.");
break;
}
}
} else {
window.alert("You need to choose a file first.");
}
}
/*
this.convertPNGtoNUU = function() {
if (!!files) {
for (i=0;i<files.length;i++) {
var PNGReader = new FileReader();
PNGReader.onload = (function(file) {
return function(e) {
e=e||event;
if (!!((cvs = document.getElementById("NUUcanvas")) && (ctx = cvs.getContext("2d")))) {
cvs.style.visibility = "hidden";
var img = document.createElement("img");
img.style.visibility = "hidden";
document.getElementsByTagName("body")[0].appendChild(img);
img.onload = function() {
cvs.width = this.width;
cvs.height = this.height;
thisNoonLoad = this;
thisNoonLoad.onload = undefined;
ctx.drawImage(thisNoonLoad, 0, 0, this.width, this.height);
var rgbColours = new Array();
var x = 0;
var y = 0;
var NUUDataStream = new DataStream();
NUUDataStream.endianness = NUUDataStream.LITTLE_ENDIAN;
NUUDataStream.writeString("RAW RGB ");
NUUDataStream.writeUint16(this.width);
NUUDataStream.writeUint16(this.height);
// this loop is fairly slow. I don't know why.
// I guess getImageData is the culprit, seeing as the other methods used here are used elsewhere and go faster.
while (y < this.height) {
rgbColours = ctx.getImageData(x, y, 1, 1).data;
// ignore rgbColours[3] - it exists but NUU does not support alpha transparency
NUUDataStream.writeUint16(((Math.round(rgbColours[0]/255*31) << 10)*1)+((Math.round(rgbColours[1]/255*31) << 5)*1)+((Math.round(rgbColours[2]/255*31))*1));
x++;
if (x >= this.width) {
y++;
x = 0;
}
}
NUUDataStream.save(file.name + ".RGB");
}
img.src = e.target.result;
img.parentNode.removeChild(img);
} else {
window.alert("Your browser does not support the HTML5 canvas element.");
}
}
})(files[i]);
PNGReader.readAsDataURL(files[i]);
}
} else {
window.alert("You need to choose a file first.");
}
}
*/
document.getElementById("NUU").onchange = setFiles;
}
/*
Here is a little true story about a boy and his trip to Wendys for a #2 no pickles.
It was a splended sunday when a boy named Pimpin' Fresh decided he would take a trip to Wendy's in the mall for his lunch break. The transaction started normal, he ordered a #2 without pickles and a diet coke. While standing at the counter a large women comes around from the back grill and throws (not sets down, not tosses, not places) THROWS his order on to the counter. He then asks her for ketchup but she ignores Pimpin Fresh and walks away. This angers our brave yet smart friend of all animals Pimpin Fresh. He then returns to his store and calls Wendys to voice his displeasure with the way he was treated. Here is that phone call word for word:
Rando Wendys Employee: Hello, Thank you for calling Wendys.
Pimpin Fresh: Hi may I speak to your manager?
Rando Wendys Employee: Hold one minute.
Wendys Manager: This is the manager.
Pimpin Fresh: Hi I was just there and a bigger blonde woman threw my order at me and ignored me when I asked for ketchup. Im not looking for the best service but it was very rude.
Wendys Manager: Sir that was me and yes I did throw your bag down and I shouldnt have done that. And I didnt hear you ask for ketchup. And thanks for calling me bigger!
CLICK!
Did she just hang up on Pimpen Fresh???? That fat !@#$%^&*!!!! This means that Pimpin Fresh must now go up there and confront the fat angry Wendys manager. Here is how that part of this story went.
Pimpin Fresh: Did you just hang up on me?
Fat Wendys Manager: You offended me.
Pimpin Fresh: But you did hang up on me right?
Fat Wendys Manager: Yes cause you offended me.
Pimpin Fresh: So there will be no misunderstanding when I tell your corporate office that I was hung up on. Second of all Ive been called bigger and it is not offensive. And to be honest with you there are 3 stages of fat. Bigger, Fat, and Oh my god dude you have to come see this!!!! Thats which one you are!
at that point he walks away.
In the end our hero Pimpin Fresh got his point across the the evil fat wendys manager and the evil fat wendys manager learned that if you are mean to people you will hate yourself at the end of a day.
The end
-PLWEB.NET
*/ Write, Run & Share Javascript code online using OneCompiler's JS online compiler for free. It's one of the robust, feature-rich online compilers for Javascript language. Getting started with the OneCompiler's Javascript editor is easy and fast. The editor shows sample boilerplate code when you choose language as Javascript and start coding.
Javascript(JS) is a object-oriented programming language which adhere to ECMA Script Standards. Javascript is required to design the behaviour of the web pages.
var readline = require('readline');
var rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
terminal: false
});
rl.on('line', function(line){
console.log("Hello, " + line);
});
| Keyword | Description | Scope |
|---|---|---|
| var | Var is used to declare variables(old way of declaring variables) | Function or global scope |
| let | let is also used to declare variables(new way) | Global or block Scope |
| const | const is used to declare const values. Once the value is assigned, it can not be modified | Global or block Scope |
let greetings = `Hello ${name}`
const msg = `
hello
world!
`
An array is a collection of items or values.
let arrayName = [value1, value2,..etc];
// or
let arrayName = new Array("value1","value2",..etc);
let mobiles = ["iPhone", "Samsung", "Pixel"];
// accessing an array
console.log(mobiles[0]);
// changing an array element
mobiles[3] = "Nokia";
Arrow Functions helps developers to write code in concise way, it’s introduced in ES6.
Arrow functions can be written in multiple ways. Below are couple of ways to use arrow function but it can be written in many other ways as well.
() => expression
const numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
const squaresOfEvenNumbers = numbers.filter(ele => ele % 2 == 0)
.map(ele => ele ** 2);
console.log(squaresOfEvenNumbers);
let [firstName, lastName] = ['Foo', 'Bar']
let {firstName, lastName} = {
firstName: 'Foo',
lastName: 'Bar'
}
const {
title,
firstName,
lastName,
...rest
} = record;
//Object spread
const post = {
...options,
type: "new"
}
//array spread
const users = [
...adminUsers,
...normalUsers
]
function greetings({ name = 'Foo' } = {}) { //Defaulting name to Foo
console.log(`Hello ${name}!`);
}
greet() // Hello Foo
greet({ name: 'Bar' }) // Hi Bar
IF is used to execute a block of code based on a condition.
if(condition){
// code
}
Else part is used to execute the block of code when the condition fails.
if(condition){
// code
} else {
// code
}
Switch is used to replace nested If-Else statements.
switch(condition){
case 'value1' :
//code
[break;]
case 'value2' :
//code
[break;]
.......
default :
//code
[break;]
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
//code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while (condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
ES6 introduced classes along with OOPS concepts in JS. Class is similar to a function which you can think like kind of template which will get called when ever you initialize class.
class className {
constructor() { ... } //Mandatory Class method
method1() { ... }
method2() { ... }
...
}
class Mobile {
constructor(model) {
this.name = model;
}
}
mbl = new Mobile("iPhone");