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I was wondering if there was a quick way to extract keys of associative array into an array, or comma-separated list using JavaScript (jQuery is ok).
options = {key1: "value1", key2: "value2"};
Result should be the array:
["key1", "key2"]
or just a string:
"key1, key2"
420
The Object keys can be attained using the Object. keys() method. In JavaScript, the Object. keys() method returns an array containing all the object's own enumerable property names.
You have to pass the object you want to iterate, and the JavaScript Object. keys() method will return an array comprising all keys or property names. Then, you can iterate through that array and fetch the value of each property utilizing an array looping method such as the JavaScript forEach() loop.
You can easily get an array of them via a for loop, for example:
var keys = [];
for(var key in options) {
if(options.hasOwnProperty(key)) { //to be safe
keys.push(key);
}
}
Then use keys how you want, for example:
var keyString = keys.join(", ");
You can test it out here. The .hasOwnProperty() check is to be safe, in case anyone messed with the object prototype and such.
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