javascript - Filtering in Vue, nested array -


im trying create computed function can filter out object "alarms",

so i've created computed function, called filteredalarms, , in loop im doing v-for loop:

<li class="event-log__item timeline__item" v-for="(item, key) in filteredalarms" :key="key">

and in filter im trying following: 

let filteredalarms = object.keys(this.eventlog).foreach(key => {   this.eventlog[key].filter(item => {     return item.type.indexof("alarm") > -1   }); });  return filteredalarms

unfortunately, doesn't work - im getting error: typeerror: this.eventlog.filter not function

what doing wrong? :)

the object im trying filter similar 1 below:

"system_events": {     "1013": [{         "id": 25899,         "timestamp": "2017-08-15t21:26:42z",         "type": "alarm",         "code": 190,         "title": "",         "description": "",         "appeared": "2017-08-15t21:26:40z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "randers pr 44b sidste station"     },      {         "id": 26157,         "timestamp": "2017-08-15t21:32:17z",         "type": "warning",         "code": 190,         "title": "",         "description": "",         "appeared": "2017-08-15t21:32:06z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "randers pr 44b sidste station"     },      {         "id": 26387,         "timestamp": "2017-08-15t21:37:38z",         "type": "info",         "code": 190,         "title": "",         "description": "",         "appeared": "2017-08-15t21:37:33z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "randers pr 44b sidste station"     }],     "1015": [{         "id": 23777,         "timestamp": "2017-08-15t20:38:08z",         "type": "alarm",         "code": 191,         "title": "",         "description": "",         "appeared": "2017-08-15t20:38:00z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "favrskov svenstrup gyvelvej"     },      {         "id": 23779,         "timestamp": "2017-08-15t20:38:08z",         "type": "alarm",         "code": 190,         "title": "",         "description": "",         "appeared": "2017-08-15t20:37:58z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "favrskov svenstrup gyvelvej"     },      {         "id": 23841,         "timestamp": "2017-08-15t20:39:41z",         "type": "alarm",         "code": 192,         "title": "",         "description": "",         "appeared": "2017-08-15t20:39:31z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "favrskov svenstrup gyvelvej"     },      {         "id": 25243,         "timestamp": "2017-08-15t21:12:03z",         "type": "alarm",         "code": 191,         "title": "",         "description": "",         "appeared": "2017-08-15t21:11:55z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "favrskov svenstrup gyvelvej"     },      {         "id": 25529,         "timestamp": "2017-08-15t21:18:11z",         "type": "alarm",         "code": 190,         "title": "",         "description": "",         "appeared": "2017-08-15t21:18:00z",         "disappeared": null,         "acknowlegded": null,         "solved": null,         "system_name": "favrskov svenstrup gyvelvej"     }] }

with foreach don't filter anything, iterate. , filter inside returns new array, doesn't change eventlog[key].

try instead:

let filteredalarams = {}  object.keys(this.eventlog).foreach(key => {   filteredalarams[key] = this.eventlog[key].filter(item => {     return item.type.indexof("alarm") > -1   }); });  return filteredalarms

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