i have an array like given below
OStatus=["hold","approved","rejected","hold","approved","rejected","hold","approved"]
i want something like this in result
Oinfo=["hold":3,"approved":3,"rejected":2].
Asked
Active
Viewed 43 times
-1
void
- 36,090
- 8
- 62
- 107
prabhat katoch
- 13
- 4
-
Well what you want is not possible, it would have to be an object – epascarello Feb 21 '18 at 20:47
-
1So what did you try, it is a simple looping problem. – epascarello Feb 21 '18 at 20:47
-
https://stackoverflow.com/questions/19395257/how-to-count-duplicate-value-in-an-array-in-javascript – epascarello Feb 21 '18 at 20:48
-
Possible use case for reduce. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce – Taplar Feb 21 '18 at 20:52
-
is it possible to get the count of each types? something like this oinfo[3,3,2] – prabhat katoch Feb 21 '18 at 21:03
1 Answers
1
Assuming that you'd like to produce an object which maps keys which are elements from an input array to values which are the counts of each element, you could use Array.reduce, like so:
Oinfo = OStatus.reduce((acc, x) => ({ ...acc, [x]: (acc[x] || 0) + 1 }), {})
Alex Yuly
- 180
- 1
- 9
-
is it possible to get the count of each types? something like this oinfo[3,3,2] – prabhat katoch Feb 21 '18 at 21:05
-
Given that `OStatus` equals `["hold","approved","rejected","hold","approved","rejected","hold","approved"]`, then my code produces `{"hold":3,"approved":3,"rejected":2}`. Is that what you want? – Alex Yuly Feb 21 '18 at 21:07