Angularjs 1：週

Question

によってソート日付私はOBJSのリストがあります：

[{ 
    name: one, 
    date: 2017-09-18 
}, { 
    name: two, 
    date: 2017-09-11 
}, { 
    name: three, 
    date: 2017-09-13 
}] 

を、私は週によってそれをソートしたいです。 多分のような：

{ 
1week(or , maybe better key like start of week): [{ 
     name: two, 
     date: 2017-09-11 
    }, { 
     name: three, 
     date: 2017-09-13 
    ], 
2week: [{ 
     name: one, 
     date: 2017-09-18 
    }] 
} 

私は日付が所属何週によって決定することができますか？ どうすればよりうまくできますか？

Answer 1

私はこれで周りに演奏し、私は、これはあなたが必要なものに似ていると思う：

https://jsfiddle.net/pegla/ytmayemr/

コード：

let arrayOfDates = [{ 
    name: 'one', 
    date: '2017-09-18' 
}, { 
    name: 'two', 
    date: '2017-09-11' 
}, { 
    name: 'three', 
    date: '2017-09-13' 
}]; 

function getWeekNumber(d) { 
    // Copy date so don't modify original 
    d = new Date(Date.UTC(d.getFullYear(), d.getMonth(), d.getDate())); 
    // Set to nearest Thursday: current date + 4 - current day number 
    // Make Sunday's day number 7 
    d.setUTCDate(d.getUTCDate() + 4 - (d.getUTCDay()||7)); 
    // Get first day of year 
    var yearStart = new Date(Date.UTC(d.getUTCFullYear(),0,1)); 
    // Calculate full weeks to nearest Thursday 
    var weekNo = Math.ceil((((d - yearStart)/86400000) + 1)/7); 
    // Return array of year and week number 
    return [d.getUTCFullYear(), weekNo]; 
} 

let newArrayOfDatesByWeek = arrayOfDates.reduce((prevVal, currVal, index)=>{ 
    let week = `week ${getWeekNumber(new Date(currVal.date))[1]} of ${getWeekNumber(new Date(currVal.date))[0]}`; 
    if(!(week in prevVal)) { 
    prevVal[week] = []; 
    } 
    prevVal[week].push(currVal); 
    return prevVal; 
}, []); 

console.log(newArrayOfDatesByWeek); 

getWeekNumber機能はそう、RobGでこの答えから取られますありがとうございます： Get week of year in JavaScript like in PHP