There's a specific line of code I'm working with that reads --
let longitude = JSON.stringify(place.lon);
After calling alert(longitude), I receive the output "44.54321". However, my intention is to retrieve just the number itself, so I attempted the following adjustment:
let longitude = parseFloat(JSON.stringify(place.lon));
Unfortunately, this modification resulted in NaN being returned. Can someone shed some light on what could be causing this issue?
Appreciate your insights!
When you use JSON.stringify() on your variable place.lat, which is already a string, it will return the value as ""33.232342"". Thus, using parseFloat(place.lat) will simply convert the string to float without any additional formatting needed.
parseFloat(place.lat);
The issue at hand is that place.lat is a string, so when it is converted to a string using JSON.stringify(), it includes quotes.
This is similar to the result of
parseFloat(JSON.stringify("3.5"))
which evaluates to
NaN
To resolve this, you can directly parse place.lat: parseFloat(place.lat)
If you need to parse a number within a string that includes quotes, you can also use
parseFloat(str.slice(1,-1))
When you use JSON.stringify, it converts primitives into strings. For example:</p>
<pre><code>JSON.stringify(5.1)
This will give you the 5-character string:
"5.1"
If you then pass this string value into parseFloat, it will result in NaN. To avoid this issue, simply refrain from using JSON.stringify on the value and your code should function correctly.
It's important to keep in mind that according to the JSON specification, only objects and arrays are allowed as top-level elements in a JSON representation. Therefore, converting a raw number with JSON.stringify is not compliant with the spec, even though most browsers will still do it.
This is where the issue originates:
JSON.stringify(place.lat) gives back "' 20.0120132312'", with an extra single quotation mark at the beginning. To resolve this, simply utilize:
parseFloat(place.lat);
What's the point of using JSON.stringify on something that is already an object?
You can simply use parseFloat(place.lat) instead.
To get the desired result, you must call upon:
parseFloat(JSON.parse(latitude))
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