michael-h.dk

Tally String Times with Reduce

A javascript program that take the time information from video clips, and add them up to a total time.

The challenge is that the time codes are hidden in the HTML, so we have to get that out, and turned into an array, that we can map over and run the reduce function on.

In code it looks like this:

const seconds = timeData
.map(node => node.dataset.time)
.map(timeCode => {
[mins, secs] = timeCode.split(':')
.map(parseFloat);
return (mins * 60) + secs;
})
.reduce((total, vidSeconds) => total + vidSeconds);