如何使用 javascript 将小时和分钟转换为分钟？

Question

我需要使用 javascript 将小时和分钟（30 分钟，65 分钟）转换为下拉列表中的分钟，如果只有 30 分钟，则显示为 30 分钟，如果是 65 分钟，则在下拉列表的文本中显示 1 小时 05 分钟，值属性中的值为 65 ，我尝试了一些代码，在图片的右侧，它给出的值是 1hr60mins 而不是 2hrs！ 在最后一行的代码中，我只是控制台对象，

 var tObj = [ {"hr": 0, "min": 30, "inMin": 0, "value": "" }, {"hr": 0, "min": 45, "inMin": 0, "value": "" }, {"hr": 1, "min": 60, "inMin": 0, "value": "" } ]; tObj.forEach(function(obj){ if(obj.min > 0){ if(obj.hr > 0){ obj.inMin = (obj.hr * 60 + obj.min); obj.value = obj.hr + "hr" + obj.min + "mins"; }else{ if(obj.min === 60){ obj.inMin = Math.floor(obj.min / 60); obj.value = obj.inMin + "hr"; }else{ obj.inMin = obj.min; obj.value = obj.min + "mins"; } } }else{ if(obj.hr > 0){ obj.inMin = (obj.hr * 60); obj.value = obj.hr + "hr"; }else{ obj.inMin = 0; obj.value = obj.min + "mins"; } } }); console.log(tObj);

Answer 1

如果我正确理解了您想要实现的目标，那么这应该可以完成工作：

 // SOLUTION TO THE EDITED QUESTION const tObj2 = Object.freeze([{ "hr": 0, "min": 30, "inMin": 0, "value": "" }, { "hr": 0, "min": 45, "inMin": 0, "value": "" }, { "hr": 0, "min": 50, "inMin": 0, "value": "" }, { "hr": 1, "min": 15, "inMin": 0, "value": "" }, { "hr": 1, "min": 30, "inMin": 0, "value": "" }, { "hr": 1, "min": 45, "inMin": 0, "value": "" }, { "hr": 2, "min": 0, "inMin": 0, "value": "" }, { "hr": 1, "min": 65, "inMin": 0, "value": "" } ]); tObj2.forEach(item => { const hours = item.hr + Math.floor(item.min / 60); const hoursTxt = hours > 0? hours + (hours === 1 && 'hr' || 'hrs'): ''; const minutes = item.min % 60; const minutesTxt = minutes + (minutes === 1 && 'min' || 'mins'); const timeTxt = hoursTxt? hoursTxt + ' ' + minutesTxt: minutesTxt; item.inMin = hours * 60 + minutes; item.value = timeTxt; }); // SOLUTION TO THE ORIGINAL QUESTION const tObj = Object.freeze([{ "hr": 0, "min": 30 }, { "hr": 0, "min": 60 }, { "hr": 1, "min": 0 }, { "hr": 1, "min": 45 }, { "hr": 2, "min": 45 }, { "hr": 0, "min": 60 } ]); const formattedTimes = tObj.reduce((acc, item) => { const hours = item.hr + Math.floor(item.min / 60); const hoursTxt = hours > 0? hours + (hours === 1 && 'hr' || 'hrs'): ''; const minutes = item.min % 60; const minutesTxt = minutes + (minutes === 1 && 'min' || 'mins'); const timeTxt = hoursTxt? hoursTxt + ' ' + minutesTxt: minutesTxt; const timeObj = { value: hours * 60 + minutes, text: timeTxt } acc.push(timeObj); return acc }, []); //test console.log('Solution to the edited question:', tObj2); console.log('Solution to the original question:', formattedTimes);

我对代码有点冗长，希望它是不言自明的，但如果你愿意，它可以缩短一点。