Published
Edited
Jun 4, 2020
sleep = x => d =>
new Promise((res, rej) => {
setTimeout(() => res(d), x);
})
calcTimeDelta = start => Date.now() - start
start = _ => Date.now()
sleepPipe = pipe(
timeDisplay,
sleep(1000),
timeDisplay,
sleep(1000),
timeDisplay,
sleep(2000),
timeDisplay
)
md`### _sleepPipe()_ proof`
fmtTimeDelta = start => `${calcTimeDelta(start)} ms elapsed`
{
const ts = start();
yield print(fmtTimeDelta(ts));
yield print(fmtTimeDelta(await sleepPipe(ts)));
}
timeDisplay = start => {
console.log(fmtTimeDelta(start));
return start;
}
trace = label => d => {
console.log(`${label}: ${d}`);
return d;
}
print = x => `output: ${x}`
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