Scratch blocks as Javascript

edo31415

This is a topic for scratch blocks as JavaScript. You can add scratchblocks and what it would be as JavaScript.

if <> then
    
end

if () {

}

Last edited by edo31415 (July 30, 2015 01:31:31)

This post was made from edo31415

ChocolatePi

if <> then
    
else

end

if () {

} else {

}

repeat until <>
    
end

while (! ) {

}

edo31415

if <> then
    
end

if () {

}

define custom (variable)

function custom(variable) {

}

This post was made from edo31415

edo31415

set [Variable v] to [Hello]

var Variable="Hello"

OR

Variable="Hello"

This post was made from edo31415

edo31415

(length of (x))

x.length

(join [hello] [world])

"hello"+"world"

ask [Hello] and wait
set [x v] to (answer)

x=prompt("Hello")

Last edited by edo31415 (July 30, 2015 02:00:18)

This post was made from edo31415

NickyNouse

let's not forget about events:

when [a v] key pressed
...

window.addEventListener("keypress", function(event) {
 if(event.keyCode == 97) {
  ...
 }
});

and

when @ clicked
...

window.addEventListener("load", function() {
 ...
});

liam48D

NickyNouse wrote:

let's not forget about events:

when [a v] key pressed
...

window.addEventListener("keypress", function(event) {
 if(event.keyCode == "a".charCodeAt(0)) {
  ...
 }
});

Fixed

202e-202e-202e-202e-202e UNI-CODE~~~~~

liam48D

forever
  ...
end

function myForeverLoop() {
  requestAnimationFrame(myForeverLoop);
  // ...
}
myForeverLoop();

Last edited by liam48D (July 30, 2015 09:19:03)

202e-202e-202e-202e-202e UNI-CODE~~~~~

ev3coolexit987654

wait (x) secs

setTimeout(, x*1000);

=0
AWESOME PROJECT =>>> https://scratch.mit.edu/projects/165749380/

tuyger

when I receive [ myMessage]

var myMessage = function() {
};

broadcast [ myMessage]

setTimeout(myMessage, 0);

broadcast [ myMessage] and wait

myMessage();

WooHooBoy

tuyger wrote:
when I receive [ myMessage]
var myMessage = function() {
};
broadcast [ myMessage]
setTimeout(myMessage, 0);
broadcast [ myMessage] and wait
myMessage();

Try putting those in [code] blocks, like this:

myMessage();

considered harmful

powerpoint56

a few more operators:

([sqrt v] of (25))
([sin v] of (90))
(round (5.2))

console.log(Math.sqrt(25)); // 5
console.log(Math.sin(90 * (Math.PI / 180))); // 1 (converts 90 degrees to radians first)
console.log(Math.round(5.2)); // 5

(letter (1) of [hello world])

"hello world".charAt(0); // "h" (the character index is zero-based, unlike Scratch)

(pick random (1) to (10))

function randomInRange(min, max) { // inclusive, like Scratch
   return Math.floor(Math.random() * (max + 1 - min)) + min;
}
randomInRange(1, 10)

Explore, my Scratch mod | Car Crash | My projects | (image by @MicroMacro)

__init__

liam48D wrote:

forever
  ...
end

while (1) {
 // code goes here
}

ftfy

thisandagain pls explain

ChocolatePi

__init__ wrote:
liam48D wrote:
forever
  ...
end
while (1) {
 // code goes here
}
ftfy

No, no, it's correct.

liam48D

ChocolatePi wrote:
__init__ wrote:
liam48D wrote:
forever
  ...
end
while (1) {
 // code goes here
}
ftfy
No, no, it's correct.

while (1) {} kills the browser, requestAnimationFrame redraws the browser and gets input and et cetera, so you should use that; it's the most like the forever Scratch block.

202e-202e-202e-202e-202e UNI-CODE~~~~~

liam48D

ChocolatePi wrote:

repeat until <>
    
end

while (! ) {

}

Fixed:

function update() {
  if (! /**/) requestAnimationFrame(update);
  // ...
}
update();

Last edited by liam48D (Aug. 4, 2015 00:07:47)

202e-202e-202e-202e-202e UNI-CODE~~~~~

Superdoggy

liam48D wrote:
while (1) {} kills the browser

Lol, I've done that a few times before. xD (accidentally of course)

bobbybee

Superdoggy wrote:
liam48D wrote:
while (1) {} kills the browser
Lol, I've done that a few times before. xD (accidentally of course)

Same here.

I remember the time when someone hosted some encrypted messages on their website, and when I cracked it, instead of setting up a legitimate program, I pasted a blob of JS using a loop like that into the console..

whoops!

“Ooo, can I call you Señorita Bee?” ~Chibi-Matoran

gtoal

Is this for teaching javascript or is someone writing a Scratch to Javascript converter? (If the latter, then the control logic part is easy, it's the sprite system etc that's the killer…)

liam48D

gtoal wrote:
Is this for teaching javascript or is someone writing a Scratch to Javascript converter? (If the latter, then the control logic part is easy, it's the sprite system etc that's the killer…)

202e-202e-202e-202e-202e UNI-CODE~~~~~

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