I have a simple object like the one below:
var countries = { "Argentina":1, "Canada":2, "Egypt":1, };
I need to create two arrays. The first array is an array of all the keys from the object. I created this array by:
var labels = Object.keys(countries);
This works well. I obtain an array of countries. Now when I try to create an array from the values...
var labels = Object.values(countries);
I get this error: Uncaught TypeError: Object.values is not a function JavaScript
I don't know what I am doing wrong. I console.log countries
before and after I declare labels
and the object remains the same. How do I properly use Object.values()
?
Educative Answers Team. According to the Mozilla website for developer documents, “the TypeError object represents an error when a value is not of the expected type.” Uncaught means that the error was not caught in the catch part of the try-catch block.
The JavaScript exception "is not a function" occurs when there was an attempt to call a value from a function, but the value is not actually a function.
JavaScript Objects Convert object's values to array You can convert its values to an array by doing: var array = Object. keys(obj) . map(function(key) { return obj[key]; }); console.
.values
is unsupported in many browsers - you can use .map
to get an array of all the values:
var vals = Object.keys(countries).map(function(key) { return countries[key]; });
See MDN doc: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values or Official doc: https://tc39.github.io/ecma262/#sec-object.values (thanks @evolutionxbox for correction)
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