Javascript Integer object is not defined

Question

I'm trying to get a stored number in the device's memory and parse it to integer using the method Integer.parseInt.

win:function(){
    this.reset();
    if(Integer.parseInt(window.localStorage.getItem("curLevel"))<this.levelNo)
    {
        window.localStorage.setItem("curLevel", this.levelNo+1);
        renderAllLevels();
    }
    $.mobile.pageContainer.pagecontainer("change", "#winlevel");
}

But when the function win is called I recieve the error Uncaught ReferenceError: Integer is not defined.

I used Integer.parseInt in other lines in my project and it worked without any error.

What is the potential error in using it here?

parseInt is a global function. There's no global object called Integer. If it wasn't causing errors before, it was probably in a different language. — Mike Cluck
– Mike Cluck, Commented Jan 13, 2016 at 20:01
When using the < comparison you don't really have to parse it, if one side is a number, the other is treated as a number — adeneo
– adeneo, Commented Jan 13, 2016 at 20:02

Daniel A. White · Accepted Answer · 2016-01-13 20:01:36Z

13

Java != JavaScript.

Use parseInt(value, 10).

answered Jan 13, 2016 at 20:01

Daniel A. White

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Comments

Lee Taylor · Accepted Answer · 2016-01-13 20:08:38Z

1

parseInt() is a global method, no need to link it to any object, you might want to change your code like so:

if( parseInt(window.localStorage.getItem("curLevel")) < this.levelNo )

edited Jan 13, 2016 at 20:08

Lee Taylor

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answered Jan 13, 2016 at 20:03

Sodabowski

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1 Comment

Mike Cluck Over a year ago

I think you forgot the < this.levelNo part.

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