Syntax Error when writing a function using "this" on JavaScript

Question

I wrote this function and Firebug tells me that there is a Syntax error, I'm sure I'm doing something wrong with the "this".

function TituloRepetido(this){
    var es=false;
    for(var i=0; i<listaPeliculas.length; i++){
        var p=listaPeliculas[i];
        if(this==p['titulo']){
            es=true;
        }
    }
    return es;
}

I've answered your question, but you'll need to post more code to figure out your issue. — ps2goat
– ps2goat, Commented Feb 21, 2014 at 23:01
Sorry for the mistakes, as I said I'm really new at this.. and I'm learning js and jQuery at the same time — daisymoon
– daisymoon, Commented Feb 22, 2014 at 18:24

htatche · Accepted Answer · 2014-02-21 23:00:49Z

4

this is a reserved keyword in javascript that refers to the instance in your current scope, which also means that you can't use it as a param.

answered Feb 21, 2014 at 23:00

htatche

6933 silver badges17 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

htatche Over a year ago

That makes sense admdrew, sorry.

bto.rdz · Accepted Answer · 2014-02-21 23:05:27Z

2

this is a reserved word in js that is similar to 'this' in c# it refers to the current function object.

just change that word with something else:

function TituloRepetido(title){

    for(var i=0; i<listaPeliculas.length; i++){
        var p=listaPeliculas[i];
        if(title==p['titulo']){
            return true;
        }
    }
    return false;
}

current function is evaluating if title exists in lista de peliculas and returning a boolean

edited Feb 21, 2014 at 23:05

answered Feb 21, 2014 at 23:02

bto.rdz

6,7404 gold badges41 silver badges56 bronze badges

2 Comments

tckmn Over a year ago

Although it could be made more efficient by returning early and eliminating the es variable.

daisymoon Over a year ago

Thanks! I'll try it. I use the es variable because they don't let me make functions with different return statements.

ps2goat · Accepted Answer · 2014-02-21 23:00:46Z

2

You can't use this as a parameter. It is a reserved word that refers to the instance of an object from within itself. Use a different parameter name.

answered Feb 21, 2014 at 23:00

ps2goat

8,5351 gold badge39 silver badges74 bronze badges

Collectives™ on Stack Overflow

Syntax Error when writing a function using "this" on JavaScript

3 Answers 3

1 Comment

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related