Question

我正在寻找一种简单的方法来在javascript中总结小时和分钟以产生总价值：

var json1 = {
  hour : "8",
  minutes : "15"
};

var json2 = {
  hour : "8",
  minutes : "45"
};

预期产出：

var total = "17h00";

Answer 1

var totalH;
var totalM;

addTimes = function(timeMap) {

    // First simply adding all of it together, total hours and total minutes
    for (var x in timeMap) {
        totalH += parseInt(timeMap[x].hour, 10);
        totalM += parseInt(timeMap[x].minutes, 10);
    }

    // If the minutes exceed 60
    if (totalM >= 60) {
        // Divide minutes by 60 and add result to hours
        totalH += Math.floor(totalM / 60);
        // Add remainder of totalM / 60 to minutes
        totalM = totalM % 60;
    }

    return totalH + "h" + totalM;
}

Answer 2

只需在Chrome控制台中复制粘贴并查看漂亮的结果

var json1 = { hour : "8", minutes : "15" };
var json2 = { hour : "8", minutes : "45" };

function get_add_two_times(json1, json2) {
    hr            = parseInt(json1.hour) + parseInt(json2.hour); 
    mn            = parseInt(json1.minutes) + parseInt(json2.minutes);
    final_hr      = hr + Math.floor(mn/60);
    final_mn      = mn%60;
    final_mn      = (final_mn < 10) ? '0' + final_mn : final_mn;

    return final_hr + 'h' + final_mn;
}
get_add_two_times(json1,json2);

一些示例输出

var json1 = {hour : "1", minutes : "15"};
var json2 = {hour : "02", minutes : "49"};
> "4h04"

var json1 = {hour : "12", minutes : "15"};
var json2 = {hour : "12", minutes : "49"};
> "25h04"

Answer 3

这是一种功能性方法，假设你有一个时间数组

var times = [{
  hour : "8",
  minutes : "15"
},{
  hour : "8",
  minutes : "45"
}]

迭代次数，求和，然后格式化，然后加入字符串。

times.reduce(function(memo, t) { // sum the times
  memo[0] += parseInt(t.hour, 10)
  memo[1] += parseInt(t.minutes, 10)
  if (memo[1] >= 60) {
    memo[0] += ~~(memo[1]/60)
    memo[1] = memo[1] % 60
  }
  return memo
}, [0, 0]).map(function(t) { // map to the desired format
  if (t < 10) {
    return '0' + t
  }
  return t
}).join('h')  // => 17h00

总结javascript中的小时和分钟

3 个答案: