Question

168

Javascript check if string if true or false and convert to Boolean

rated 0 times [ 173] [ 5] / answers: 1 / hits: 82590 / 11 Years ago, mon, november 11, 2013, 12:00:00

Is there a better way to improve the below statement to check if the val() is 'true' or 'false' and if it is then it will change it to a Boolean. The reason being, some of the values may be a word.

var thisval = $(this).val();

if (thisval == true){

    ao[id] = true;

} else if (thisval == false){

    ao[id] = false;

} else {

    ao[id] = $(this).val();

}

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erick

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3 Years ago

answered 11 Years ago byrondonavanc · Accepted Answer

Most readable:

var thisval = $(this).val();

ao[id] = thisval === 'true' ? true : 

         thisval === 'false' ? false : 

         thisval;

One-liner based on the conditional operator:

var thisval = $(this).val();

ao[id] = thisval === 'true' ? true : (thisval === 'false' ? false : thisval);

One-liner based on || and && behavior:

var thisval = $(this).val();

ao[id] = thisval === 'true' || (thisval !== 'false') && thisval || false;

Shortest one-liner (combination of the above):

var thisval = $(this).val();

ao[id] = thisval === 'true' || (thisval === 'false' ? false : thisval);