javascript - Call custom array.sort function within another sort function -

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• how access correct `this` inside callback? 5 answers

is there way can this? in code snippet below, this doesn't have access sortbyname fn when called within sortbylyncstatus

prototype defn:

sortbyname: function (bud, light) {   if (bud.fullname < light.fullname)     return -1;   if (bud.fullname > light.fullname)     return 1;   return 0; },  sortbylyncstatus: function (chuck, norris) {   if (chuck.lyncavailability == "available" && norris.lyncavailability == "available") {     return this.sortbyname(chuck, norris);   }   else {     if (chuck.lyncavailability == "available")       return -1;     if (norris.lyncavailability == "available")       return 1;     else { // both away, inactive, offline, or out of office       var chucklastactive = $.todatefromjson(chuck.lynclastactive);       var norrislastactive = $.todatefromjson(norris.lynclastactive);       if (chucklastactive < norrislastactive)         return 1;       if (chucklastactive > norrislastactive)         return -1;        return this.sortbyname(chuck, norris);     }   } } 

solution

some.prototype.obj = {    sortbyname: function (a, b) {     // omitted solution   },    sortbylyncstatus: function(a, b) {     // compare cases      // default name comparison     return some.prototype.obj.sortbyname(a, b);   } } 

this refer window sorts. unless define sortbyname global function, won't exist method on this.

you can define function rather method , call directly, so:

var sortbyname = function(a,b){};  var sortbylyncstatus = function(a,b){     return sortbyname(a,b); }