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XiongLiding/samplingRate.coffee

Created April 23, 2014 04:04
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use samplingRate to limit the frequency of event trigger
Raw
samplingRate.coffee
# Define samplingRate
samplingRate = (interval) ->
mark = 0
->
now = Date.now()
return false if now - mark < interval
mark = now
# How to use
sampling = samplingRate 1000
setInterval ->
console.log 'called every 100ms'
if sampling()
console.log 'called every 1000ms'
, 100
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