How to convert 1 to true or 0 to false upon model fetch

Question

I have a model that is set with a JSON response from a mysql database  The model data is set with true or false into a boolean tinyint field in the database  which uses 1 or 0    In my view  I have a binding that checks for a boolean with underscore s   isBoolean  Of course  when my model receives the data  it is set with 1 or 0 instead of true or false and the   isBoolean check fails   Is there anyway to either correctly have my JSON response from mysql be a boolean true or false value instead of 1 or 0  or preferably  is there a way to have my model update itself upon fetch  and before the view renders  to cast true or false based on it s 1 or 0 property   e g  my model s data looks like   isChecked   1   when I need it to be   isChecked  true   Thank you greatly for any suggestions you may have

User · Answer

Assigning Comparison to property value

JavaScript

You could assign the comparison of the property to "1"

obj["isChecked"] = (obj["isChecked"]==="1");

This only evaluates for a String value of "1" though. Other variables evaulate to false like an actual typeof number would be false. (i.e. obj["isChecked"]=1)

If you wanted to be indiscrimate about "1" or 1, you could use:

obj["isChecked"] = (obj["isChecked"]=="1");

Example Outputs

console.log(obj["isChecked"]==="1"); // true
console.log(obj["isChecked"]===1); // false
console.log(obj["isChecked"]==1); // true
console.log(obj["isChecked"]==="0"); // false
console.log(obj["isChecked"]==="Elephant"); // false

PHP

Same concept in PHP

$obj["isChecked"] = ($obj["isChecked"] == "1");

The same operator limitations as stated above for JavaScript apply.

Double Not

The 'double not' also works. It's confusing when people first read it but it works in both languages for integer/number type values. It however does not work in JavaScript for string type values as they always evaluate to true:

JavaScript

!!"1"; //true
!!"0"; //true
!!1; //true
!!0; //false
!!parseInt("0",10); // false

PHP

echo !!"1"; //true
echo !!"0"; //false
echo !!1; //true
echo !!0; //false

User · Answer

Here s another option that s longer but may be more readable   Boolean Number  0        false Boolean Number  1        true

User · Answer

Use a double not     1   true     0   false   obj isChecked     parseInt obj isChecked

User · Answer

All you need is convert string to int with   and convert the result to boolean with      var response     isChecked   1    response isChecked      response isChecked   You can do this manipulation in the parse method   parse  function  response      response isChecked      response isChecked    return response      UPDATE  7 years later  I find Number string  conversion more elegant  Also mutating an object is not the best idea  That being said   parse  function  response      return Object assign     response        isChecked    Number response isChecked      OR     isChecked  Boolean Number response isChecked

User · Answer

Boolean Number myVar    or    myVar

[javascript] How to convert 1 to true or 0 to false upon model fetch

Assigning Comparison to property value

JavaScript

Example Outputs

PHP

Double Not

JavaScript

PHP

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