Use JavaScript to sift through an array and exclusively retrieve items that match a specific value

I am working with an array of objects that contain a phase key, and I want to filter out only the ones that have a specific phase value. Additionally, I need to map some other key/value pairs into the final return. Here is my current code:

phaseToBlocks (toggle, phase) {
  this.phaseBlocks = this.$store.state.addresses.salesRepPhases
  return this.phaseBlocks
    .filter(fiber_phase === phase)
    // .map(({id, phase, name, min_number, max_number}) => ({id: id, phase: fiber_phase, name: name, min_number: min_number, max_number: max_number}))
}

Unfortunately, the current implementation is not filtering out any values and just returning the original array of objects. Below is a snippet of the array of objects for reference:

[ { "fiber_phase": "101", "parsed_hash": "1bc7fb114ee10d7cb9cea10693d238b5", "min_number": 400, "max_number": 499, "sales_rep": "164", "id": "abd90d6b-28a8-2be6-d6c1-abd9007aef38", "name": "48TH ST E", "block_minimum": 400, "block_maximum": 498 }, { "fiber_phase": "101", "parsed_hash": "1bc7fb114ee10d7cb9cea10693d238b5", "min_number": 400, "max_number": 499, "sales_rep": "164", "id": "abd90d6b-28a8-2be6-d6c1-abd9007aef38", "name": "48TH ST E", "block_minimum": 401, "block_maximum": 499 }, { "fiber_phase": "103", "parsed_hash": "1e002ef82be950696f9053dc77b621cf", "min_number": 4700, "max_number": 4799, "sales_rep": "164", "id": "a1d58c9c-6ba7-ebc6-8a74-a1d5806e0bcf", "name": "11TH AVE S", "block_minimum": 4700, "block_maximum": 4798 }]
javascriptarraysfiltervue.jsecmascript-6

Answer №1

filter() uses a callback function to evaluate a condition and perform filtering:

let filteredBlocks = this.phaseItems
    .filter(element => element.stage === stage);

Answer №2

If you're still unsure about how the method .filter operates, take a look at this example:

this.phaseBlocks.filter((currentBlock) => {
   return currentBlock.fiber_phase === phase;
});

The filter function loops through each element in the array, with (currentBlock) representing the currently iterated element.

If the element meets a specific condition (in this case, if its fiber_phase property matches the value of phase), it is added to a new array created by filter.

For more detailed information, refer to the documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

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