CODEWITHSUNDEEP
coffeescript
ggaaooppeenngg
ggaaooppeenngg

Reputation: 1383

Why setInterval (->...) ,0 won't run as I expected?

From CoffeeScript Accelerated JavaScript Development, chapter 6.6, question:

count = 10
h = setInterval (-> count--),100
do (->) until count is 0
clearInterval h
console.log 'Suprise!'

count won't be 0,I try to change 100 to 0,result is the same. which stack is the setInterval in? when will the callback function (-> count--) run?

Upvotes: 1

Views: 49

Answers (1)

SLaks
SLaks

Reputation: 888243

Javascript is strictly single-threaded.
All asynchronous callbacks will only run after your code finishes running.

Your infinite loop never finishes running, so the setInterval callback never runs.

Upvotes: 3

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