How to using jQuery search the array key or check for a key exists in an array.
Since JavaScript doesn’t really have associative arrays, then we only write a function to check.
var foo = {
my: "60",
sg: "80",
us: "50",
au: "40",
hk: "90",
cn: "30",
tw: "55",
};
Use in to check for a key:
function key_exists($key, $array) {
if ( !( $key in $array ) ) {
return false
}
return true;
}
How to use:
//key_exists(key, search array)
if (key_exists('my', foo)) {
alert('found');
} else {
alert('no found');
}
If the key exists it will return true and popout an alert with found message.