How to convert string '3w2d24h' to milliseconds in js-CodePudding

I need to convert the string '3w2d24h' to milliseconds. How to do it with moment or with any other library?

CodePudding user response：

Use regex to parse the string. Then add them up:

function parseDuration(text) {
    let pattern = /(?:(\d )w)?(?:(\d )d)?(?:(\d )h)?/;
    let match = text.match(pattern);
    let weeks = parseInt(match[1]) || 0;
    let days = parseInt(match[2]) || 0;
    let hours = parseInt(match[3]) || 0;
    return ((weeks*7   days)*24   hours)*60*60*1000;
}

CodePudding user response：

You could create a custom function , say getMilliseconds() to convert this type of string to milliseconds.

We'd use String.match() to split the string into its components, then use Array.reduce() to sum the total time, given a weights lookup that specifies how to weight each value.

One could add further values to the weights lookup, such as y, s, etc.

function getMilliseconds(str) {
    const weights = { w: 7*24*3600*1000, d: 24*3600*1000, h: 3600*1000 };
    return str.match(/\d{1,2}\w{1}/g).reduce((acc, cur, i) => {
        return acc   cur.slice(0, -1)*weights[cur.slice(-1)];
    }, 0)
}

const inputs = ['3w2d24h', '1d0h', '1w', '1w1d1h'];
inputs.forEach(input => console.log('Input:', input   ', ms:', getMilliseconds(input)))

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