RosettaCodeData/Task/Associative-array-Creation/JavaScript/associative-array-creation-...

23 lines
581 B
JavaScript

var assoc = {};
assoc['foo'] = 'bar';
assoc['another-key'] = 3;
// dot notation can be used if the property name is a valid identifier
assoc.thirdKey = 'we can also do this!';
assoc[2] = "the index here is the string '2'";
//using JavaScript's object literal notation
var assoc = {
foo: 'bar',
'another-key': 3 //the key can either be enclosed by quotes or not
};
//iterating keys
for (var key in assoc) {
// hasOwnProperty() method ensures the property isn't inherited
if (assoc.hasOwnProperty(key)) {
alert('key:"' + key + '", value:"' + assoc[key] + '"');
}
}