<![CDATA[Typescrypt array help.]]>Parent array

let activity = [
{ startDate: 2020-10-21, endDate: 2020-10-22, steps: 100, distance: 100 }, 
{ startDate: 2020-10-22, endDate: 2020-10-23, steps: 100, distance: 100 }
]

මෙන්න මේ උඩ තියෙන Array එකට පහත දක්වලා තියෙන arrays 2න් ඩේටා ගන්න ඕන. මේ උඩ තියෙන ඇරේ එකේ startDate, endDate වලට සමාන අගයන් තියෙන පහල තියෙන ඇරෙස් වලින් ඩේටා අරගෙන ෆිල් කරවන්න ඕන. මේක කොහොමද කරගන්නෙ?

let steps= [
{ startDate: 2020-10-21, endDate: 2020-10-22, steps: 100 }, 
{ startDate: 2020-10-22, endDate: 2020-10-23, steps: 100 }
]

let activity = [
 { startDate: 2020-10-21, endDate: 2020-10-22, distance: 100 }, 
{ startDate: 2020-10-22, endDate: 2020-10-23, distance: 100 }
                          ]

ස්තූතියි

]]>https://lankadevelopers.lk/topic/794/typescrypt-array-helpRSS for NodeFri, 17 Jul 2026 10:40:47 GMTMon, 08 Feb 2021 18:22:54 GMT60<![CDATA[Reply to Typescrypt array help. on Sun, 14 Feb 2021 18:47:40 GMT]]>@nb said in Typescrypt array help.:

                                                                                                                                                                            distance: Number                                                                                                                                                                            }                                                                                                                                                                                                                                                                                                                                                         let steps: Array<Steps> = [                                                                                                                                                                                { startDate: '2020-10-21', endDate: '2020-10-22', steps: 101 },                                                                                                                                                                                 { startDate: '2020-10-22', endDate: '2020-10-23', steps: 102 },                                                                                                                                                                                { startDate: '2020-10-24', endDate: '2020-10-25', steps: 103 }                                                                                                                                                                            ];                                                                                                                                                                                                                                                                                                                                                         let activity: Array<Distance> = [                                                                                                                                                                                { startDate: '2020-10-21', endDate: '2020-10-22', distance: 101 },                                                                                                                                                                                 { startDate: '2020-10-22', endDate: '2020-10-23', distance: 102 },                                                                                                                                                                                { startDate: '2020-10-26', endDate: '2020-10-26', distance: 103 }                                                                                                                                                                            ];                                                                                                                                                                                                                                                                                                                                                         function join<L extends Record<string,any>, R extends Record<string,any>>(left: Array<L>,  right: Array<R>,  by: Array<string>) {                                                                                                                                                                                const joined: Array<L&R> = [];                                                                                                                                                                                                                                                                                                                                                             for (let l of left) {                                                                                                                                                                                    const fromRight = right.find(r => by.every((curr) => (r[curr] == l[curr]), true))                                                                                                                                                                                    if (fromRight === undefined)                                                                                                                                                                                        continue;                                                                                                                                                                                    joined.push({ ...fromRight, ...l})                                                                                                                                                                                }                                                                                                                                                                                                                                                                                                                                                             return joined;                                                                                                                                                                            }                                                                                                                                                                                                                                                                                                                                                         console.log(join(steps, activity, ['startDate', 'endDate']))                                                                                                                                                                            /*                                                                                                                                                                            [LOG]: [{                                                                                                                                                                              "startDate": "2020-10-21",                                                                                                                                                                              "endDate": "2020-10-22",                                                                                                                                                                              "distance": 101,                                                                                                                                                                              "steps": 101                                                                                                                                                                            }, {                                                                                                                                                                              "startDate": "2020-10-22",                                                                                                                                                                              "endDate": "2020-10-23",                                                                                                                                                                              "distance": 102,                                                                                                                                                                              "steps": 102                                                                                                                                                                            }]                                                                                                                                                                             */

Thanx Brother. man try karala balannam meka

]]>https://lankadevelopers.lk/post/4350https://lankadevelopers.lk/post/4350Sun, 14 Feb 2021 18:47:40 GMT<![CDATA[Reply to Typescrypt array help. on Thu, 11 Feb 2021 07:19:32 GMT]]>මේ වැඩේ හිතුවට වඩා සංකීර්ණයි. කොහොම හරි O(n2) solution එකක් හොයා ගත්තා.

interface Steps extends Record<string, any> { 
    startDate: String; 
    endDate: String; 
    steps: Number
}

interface Distance extends Record<string, any> { 
    startDate: String; 
    endDate: String; 
    distance: Number
}

let steps: Array<Steps> = [
    { startDate: '2020-10-21', endDate: '2020-10-22', steps: 101 }, 
    { startDate: '2020-10-22', endDate: '2020-10-23', steps: 102 },
    { startDate: '2020-10-24', endDate: '2020-10-25', steps: 103 }
];

let activity: Array<Distance> = [
    { startDate: '2020-10-21', endDate: '2020-10-22', distance: 101 }, 
    { startDate: '2020-10-22', endDate: '2020-10-23', distance: 102 },
    { startDate: '2020-10-26', endDate: '2020-10-26', distance: 103 }
];

function join<L extends Record<string,any>, R extends Record<string,any>>(left: Array<L>,  right: Array<R>,  by: Array<string>) {
    const joined: Array<L&R> = [];

    for (let l of left) {
        const fromRight = right.find(r => by.every((curr) => (r[curr] == l[curr]), true))
        if (fromRight === undefined)
            continue;
        joined.push({ ...fromRight, ...l})
    }

    return joined;
}

console.log(join(steps, activity, ['startDate', 'endDate']))
/*
[LOG]: [{
  "startDate": "2020-10-21",
  "endDate": "2020-10-22",
  "distance": 101,
  "steps": 101
}, {
  "startDate": "2020-10-22",
  "endDate": "2020-10-23",
  "distance": 102,
  "steps": 102
}] 
*/

Types දාපු හැටි හරිද දන්නෑ. logic එක නං හරි.

Playground link

]]>https://lankadevelopers.lk/post/4349https://lankadevelopers.lk/post/4349Thu, 11 Feb 2021 07:19:32 GMT