somnusochi / practice Goto Github PK

obj={a:{b:{c:1}}},
key='a.b.c';

function get(obj, key) {
    let args = key.split('.');
    args.reduce((preValue, curValue, index, array) = >{
        if (obj.hasOwnProperty(curValue)) {
            obj = obj[curValue];
        } else {
            obj = 'obj不存在对应key';
        }
        return obj;
    },
    obj) return obj;
}
get(obj, key);

obj={a:{b:{c:1}}},
key='a.b.c';

function get(obj, key) {
    let args = key.split('.');
    args.forEach(v = >{
        if (obj.hasOwnProperty(v)) {
            obj = obj[v];
        } else {
            console.log('obj内不存在对应key');
        }
    }) return obj;
}

get(obj, key);

function flatten(array) {
    let newArray = [];
    function resolveArr(arr) {
        if (Array.isArray(arr)) {
            arr.forEach(value = >{
                if (Array.isArray(value)) {
                    resolveArr(value);
                } else {
                    newArray.push(value);
                }
            });
        } else {
            newArray.push(arr);
        }
    }
    resolveArr(array);
    return newArray;
}

flatten([1, [2], [3, [[4]]]]);

n = 6,
m = 2;

function dispatch(n, m) {
    arr = Array(m).fill('naive').map((v, i) = >{
        return [];
    });
    subArr = Array(n).fill('naive').map((v, i) = >{
        return i + 1;
    });
    let remainder = n % m;
    let quotient = (n - remainder) / m;
    let length = 0;
    arr.forEach((value, index) = >{
        for (i = 1; i <= quotient; i++) {
            value.push(i + index * quotient);
            length = i + index * quotient;
        }
    });
    restArr = subArr.slice(length);
    restArr.forEach((value, index) = >{
        arr[index].push(value);
    }) console.log(arr);
}

dispatch(n, m);