getUnit to convert given value to iOS or Android specific metrics.

getUnit.js

/*
Sample 1 
getUnit({iOS:'35%',Android:'37%'})
returns 35% for iOS, 37% for Android

Sample 2
getUnit(80);
returns 80 for iOS, 80dp for Android
*/
var getUnit = function(value) {
    if (typeof value === "object")
        return getUnit(value[Device.deviceOS]);
    if (value.toString() === "%")
        return value;
    if (Device.deviceOS === "Android")
        return value + "dp";
    else
        return value;
}

module.exports = getUnit;