src/operator/merge-sort.js
function defSortFn (a, b) {
    const a1 = `${a}`;
    const b1 = `${b}`;
    if (a1 < b1) {
        return -1;
    }
    if (a1 > b1) {
        return 1;
    }
    return 0;
}
function defSortFn (a, b) {
    const a1 = `${a}`;
    const b1 = `${b}`;
    if (a1 < b1) {
        return -1;
    }
    if (a1 > b1) {
        return 1;
    }
    return 0;
}
function defSortFn ( a , b ) { const a1 = ` ${ a } ` ; const b1 = ` ${ b } ` ; if ( a1 < b1 ) { return - 1 ; } if ( a1 > b1 ) { return 1 ; } return 0 ; }
The default sort function.

@param {*} a - The first value.
@param {*} b - The second value.
@return {number} Returns the comparison result e.g. 1 or 0 or -1.
The default sort function .