I have a $scope.arrSubThick = [1: 2, 2: 3, 3: 4, 4: 5, 5: 6, 6: 8, 7: 10, 8: 12, 9: 15, 10: 19] like this how to get the key of this array in script.
for eg: key of value 3 is 2 similarly 6th value key is 5
Thanks in advance
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2 Answers
JavaScript doesn't have "associative arrays". It has arrays:
[1, 2, 3, 4, 5]
or objects:
{1: 2, 2: 3, 3: 4, 4: 5, 5: 6}
The second case, is what you want, then you can use:
var looking_for = 3;
var looking_for_key;
angular.forEach(values, function(value, key) {
if(value == looking_for){
looking_for_key = key;
}
});
alert(looking_for_key);
Comments
Array key defining like that is not possible in js. You shoud to it like this by using array of objects:
$scope.arrSubThick = [{1: 2}, {2: 3}, {3: 4}];
Or with an single object (I guess, this fits for your needs):
$scope.arrSubThick = {1: 2, 2: 3, 3: 4};
console.log($scope.arrSubThick[1]); // 2
If you want to find key by value, do this:
$scope.arrSubThick = {
1: 2,
2: 3,
3: 4
};
$scope.selected = null;
$scope.getItemByValue = function(value) {
angular.forEach($scope.arrSubThick, function (val, key) {
if (val == value) {
$scope.selected = key;
}
});
};
$scope.getItemByValue(2);
1 Comment
user1187
i want the opposite way.like if you give 2 as input it should alert 1