How can I convert '00: 30: 00 ' format to seconds?

Question

I want to convert the format example '00: 30: 00' on seconds. This is my way. Is there a way to add these values in the 'template string'?

expected effect:

convert1000('00:30:00') --> 1800

convert1000('00:00:10') --> 10

convert1000('00:08:10') --> 490

convert1000('01:01:10') --> 3670

const convert1000 = (time) => {
    const [hour, minute, sec] = time.split(':');

    if (hour !== "00") {
      return `${(hour* 3600)} + ${(minute * 60)} + ${(sec)}`;
    }

    if (minute !== "00") {
      return `${minute * 60} + ${sec} `;
    }

    return `${sec} `;
  }

Possible duplicate of [Convert HH:MM:SS string to seconds only in javascript](https://stackoverflow.com/questions/9640266/convert-hhmmss-string-to-seconds-only-in-javascript) — Feras Al Sous, Jun 26 '19 at 12:58
You want a `sscanf` from good old C? Alas, I don't believe vanilla JS has it. — mbojko, Jun 26 '19 at 13:01
This question is really not about how to convert it, OP is doing it.... lol, question is about how to use string templates literals to do a calculation. — epascarello, Jun 26 '19 at 13:05

Lucas · Accepted Answer · 2019-07-16T15:31:06.190

6

Use asSeconds from momentjs duration objects

moment.duration('00:30:00').asSeconds();

edited Jul 16 '19 at 15:31

answered Jun 26 '19 at 12:59

Lucas

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Don't know why I get a down vote, as the question is flagged momentjs... – Lucas Jun 26 '19 at 13:00
My bad, my original answer did not work actually. Updated it. – Lucas Jun 26 '19 at 13:07

Nina Scholz · Answer 2 · 2019-06-26T13:14:49.270

5

You could split and reduce the values by multiplying the former value by 60 and then add the value.

const convert1000 = time => time.split(':').reduce((s, t) => s * 60 + +t, 0);
  
console.log(convert1000('00:30:00')); // 1800
console.log(convert1000('00:00:10')); // 10
console.log(convert1000('00:08:10')); // 58 is wrong, because 8 minutes is 480 plus 10 sec
console.log(convert1000('01:01:10')); // 3670

edited Jun 26 '19 at 13:14

answered Jun 26 '19 at 13:03

Nina Scholz

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score 2 · Answer 3 · answered Jun 26 '19 at 13:03

2

You need to do it like this

const convert1000 = (time) => {
  const [h,m,s] = time.split(':');
  let seconds = (h*3600) + (m * 60) + parseInt(s);
  return seconds;
}

alert(convert1000("00: 30: 00"))

See the fiddle here https://jsfiddle.net/q4zvsowe/

answered Jun 26 '19 at 13:03

Shridhar Sharma

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Justin Gilman · Answer 4 · 2019-06-26T13:10:57.643

2

You need to convert the string numbers into integers first. This should work the way you intend:

let convert1000 = (timeString) => {
    let [hour, minute, second] = timeString.split(':').map(Number);
    return `${(hour* 3600) + (minute * 60) + (second)}`;
}

Note that this returns a string; if you want it to be a number, just remove the templating.

edited Jun 26 '19 at 13:10

answered Jun 26 '19 at 13:05

Justin Gilman

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Alireza HI · Answer 5 · 2019-06-26T13:15:36.530

1

You need to put the + inside the braces to make them sum numbers.

You should put it inside one ${}

So your code would be like below:

const convert2000 = (time) => {
    const [hour, minute, sec] = time.split(':');

    if (hour !== "00") {
      return `${hour* 3600 + minute * 60 + sec}`;
    }

    if (minute !== "00") {
      return `${minute * 60 + sec} `;
    }

    return `${sec}`;
}

edited Jun 26 '19 at 13:15

answered Jun 26 '19 at 13:01

Alireza HI

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issue is sec is a string – epascarello Jun 26 '19 at 13:07

score 0 · Answer 6 · answered Jun 26 '19 at 13:06

0

Try this:

const convert1000 = (time) => {
  const [hour, minute, sec] = time.split(':');
  return hour * 3600 + minute * 60 + sec * 1;
};

console.log(convert1000('00:30:00'));

answered Jun 26 '19 at 13:06

Feras Al Sous

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How can I convert '00: 30: 00 ' format to seconds?

6 Answers6