javascript recursive class: undefined method -

i have javascript class meant deal promises. first add functions array, executes them pops them , calls next one. @ end of array resolves promise. hope propagate resolution way stack of recursive calls. allow force multiple asynchronous functions run sequentially using simple set of commands. furthermore employ logic modify flow of ansync functions.

function sequencer() {      this.functionsequence = [];      this.addfunction = function (func) {         this.functionsequence.push(func);     }     this.getfunctionsequence = function () {         return functionsequence;     }     this.executeall = function () {         var functionlist = this.functionsequence;         var deferred = $q.defer();         if (functionlist.length > 0) {             functionlist[0]().then(function (result) {                 if (result) {                     functionlist.splice(0, 1);                     executeall().then(function (resultinner) {                         if (resultinner == true) {                             deferred.resolve(true);                         } else {                             deferred.resolve(false);                         }                     });                 } else {                     functionlist = [];                     deferred.resolve(false);                 }             });         } else {             deferred.resolve(true);         }         return deferred.promise;     } } 

i getting referenceerror: 'executeall' undefined in script, on recursive call line "executeall' after splice

the first function in array being executed(i testing modal pop up) , when resolves hits splice, throws error right on executeall line. defining function incorrectly? calling correctly recursive function?

use this.executeall - assuming this correct, wont, you'll need account ... var self = this @ top of executeall, call self.executeall

this.executeall = function() {     var functionlist = this.functionsequence;     var deferred = $q.defer();     var self = this; // save reference     if (functionlist.length > 0) {         functionlist[0]().then(function(result) {             if (result) {                 functionlist.splice(0, 1);                 // need use self here because "this" not "this" want                 self.executeall().then(function(resultinner) {                     if (resultinner == true) {                         deferred.resolve(true);                     } else {                         deferred.resolve(false);                     }                 });             } else {                 functionlist = [];                 deferred.resolve(false);             }         });     } else {         deferred.resolve(true);     }     return deferred.promise; }; 

the reason this not this "want" due how this works in javascript - there plenty on info on stack exchange using this - i'll find , link answer shortly

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i offer alternative code

this.executeall = function() {     return this.functionsequence.reduce(function(promise, item) {         return promise.then(function(result) {             if (result) {                 return item();             }             else {                 throw "fail"; // throw stop chain             }         });     }, promise.resolve(true))     .then(function(result) {         this.functionsequence = []; // clear out added functions         return true; // fulfilled value true per original code     }.bind(this), function(err) {         this.functionsequence = []; // clear out added functions         if (err == "fail") {             return false; // convert "fail" fullfilled value of false per original code         }         else {             throw err; // other error - re-throw error         }     }.bind(this)) };