Javascript String to Boolean

Question

At the moment I'm using jQuery to check the value of the select box and the values are either true or false but when I go to select the value in the jquery it recognises it as a string.

Then I have to go change it to a Boolean for it to work in my setOptions I was wondering if it was possible to convert to Boolean without having to go through the process I've done below?

html

<select name="scalecontrol" id="scalecontrol">
    <option value="false">None</option>
    <option value="true" selected="selected">Standard</option>
</select>

jQuery

$('#scalecontrol').change(function(){
    ao.scalecontrol = $(this).val();
    if (ao.scalecontrol == 'false'){
        ao.scalecontrol = false;
    } else {
        ao.scalecontrol = true;
    }
    map.setOptions({
        scaleControl:ao.scalecontrol
    });
});

see http://stackoverflow.com/questions/263965/how-can-i-convert-a-string-to-boolean-in-javascript — amdixon, Nov 11 '13 at 11:53
I deleted my answer because a) it was overkill (thanks @musefan) and b) it's already been answered before — Reinstate Monica Cellio, Nov 11 '13 at 11:57

score 2 · Accepted Answer · answered Nov 11 '13 at 11:57

If using .val() results in a string type then you have to work with that, however you can shorten your code to the following:

$('#scalecontrol').change(function(){
    ao.scalecontrol = $(this).val() == 'true';
    map.setOptions({
        scaleControl:ao.scalecontrol
    });
});

score 1 · Answer 2 · answered Nov 11 '13 at 11:57

1

Try this:

$('#scalecontrol').change(function(){
    map.setOptions({
        scaleControl: $(this).val() === "true"
    });
});

answered Nov 11 '13 at 11:57

Renato Gama

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Javascript String to Boolean

2 Answers2