Python coding to javascript for OSWeb/JATOS

adars · March 2022

Hi Everyone! I made an experiment that is locally running fine. I have added three short inline python scripts. Now, I need to run it online using JATOS and I am unable to do so because it requires javascript. I do not have any prior understanding of java coding. Any type of help would be highly beneficial.

## first inline python script
global win_b
global win_c

win_b = 100
win_c = 50
win = 0
total = 0
current = 2000
previous = 2000
borrowed = 2000
net = 0

exp.set('current', current)
exp.set('previous', previous)
exp.set('currency', 'INR')


## second inline python script
exp.set('previous', current)

if self.get('response') == 2:
    loss =self.get('b')
    win = win_b
elif self.get('response') == 3:
    loss =self.get('c')
    win = win_c

total = current + loss + win
current = total
net = current - borrowed

exp.set('win', win)
exp.set('loss', loss)
exp.set('current', total)


## third inline script
if [loss]+[win]>[0]:
    src = pool['Sound_Win.wav']
    my_sampler = Sampler(src, volume=.5)
    my_sampler.play()


elif [loss]+[win]<[0]:
    src = pool['Sound_No.wav']
    my_sampler = Sampler(src, volume=.5)
    my_sampler.play()

Please help if possible.

sebastiaan · March 2022

Hi @adars ,

It seems that everything in your scripts can be re-implemented in JavaScript, and syntactic differences between JavaScript and Python are (for simple things) not that large. I would start by reading this page and following this tutorial, which together should provide you with the tools you need.

One important note. This:

if [loss]+[win]>[0]:

... probably doesn't do what you think it does, neither in Python nor in JavaScript. The + operator concatenates lists (and it does not add up the contents of the lists!), and so you're effectively asking whether a list of length 2 ([loss, win]) is longer than a list of length 1 ([0]), which is always true. You probably mean:

if var.loss + var.win > 0:

Another note: there is no Sampler object in JavaScript. But you probably don't need that, because you can use a regular sampler item from the user interface.

— Sebastiaan

adars · March 2022

Thank You @sebastiaan ! I will go through the mentioned details and tutorials and try to change the python inline script to javascript. Also, thanks for correcting the code for conditional audio play!

Howdy, Stranger!

Categories

Python coding to javascript for OSWeb/JATOS

Comments

Howdy, Stranger!

Quick Links

Categories

Python coding to javascript for OSWeb/JATOS

Comments