Access Object's "this" in another object's foreach function?

Question

function Test(){
    this.update = function(entity){
              entity.forEach(function(enemy) {
                    this.checkHit(enemy);
                });
        }

        this.checkHit = function(entity){
                console.log("worked!");
        }

}

How can I call Test's this.checkHit function, and pass it the current value in the entity's foreach loop?

Current code gives "this.checkHit" is not a function.

check console.log(this) and do changes as suggested by @zerkms — Deepak Ingole
– Deepak Ingole, Commented Feb 7, 2014 at 10:19

score 3 · Accepted Answer · 2014-02-07 11:00:02Z

3

If you don't care about old browsers - which seems to be the case since you're using forEach - you could use bind (also I assume that you're doing new Test() somewhere) :

entity.forEach(function (enemy) {
    this.checkHit(enemy);
}.bind(this));

edited Feb 7, 2014 at 11:00

answered Feb 7, 2014 at 10:44

user1636522

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Comments

Rems · Accepted Answer · 2014-02-07 10:34:21Z

0

Just put this in a normal variable. self is commonly used

function Test(){
    var self = this;
    this.update = function(entity){
              entity.forEach(function(enemy) {
                    self.checkHit(enemy);
                });
        }

        this.checkHit = function(entity){
                console.log("worked!");
        }

}

answered Feb 7, 2014 at 10:34

Rems

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