对于布尔值，＆和&&等于

Question

Ok与＆和&&等价于布尔值。

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use \App\Location;

class AjaxLocationsController extends Controller
{
    public function index(Request $request)
    {
    $searchquery = $request->searchquery;
    $states = collect();
    $countries = collect();
    $all_details = collect();
    $counter = 0;

    $locations = Location::select('id', 'location', 'parent_id')
    ->where([['id', '>', 4351], ['location', 'like', '%' . $searchquery . '%']])
    ->orderBy('location')
    ->get();

    foreach ($locations as $location)
    {
        $state = Location::select('id as state_id', 'location as state', 'parent_id as state_parent_id')
        ->where('id', '=', $location->parent_id)
        ->get();

        $states->push($state);
    }

    $states = $states->flatten();

    foreach ($states as $state)
    {
        $country = Location::select('id as country_id', 'location as country')
        ->where('id', '=', $state->state_parent_id)
        ->get();

        $countries->push($country);
    }

    $countries = $countries->flatten();

    foreach ($locations as $location)
    {
        $full_location = collect([
            'id' => $location->id,
            'location' => $location->location,
            'parent_id' => $location->parent_id,
            'state_id' => $states[$counter]['state_id'],
            'state' => $states[$counter]['state'],
            'state_parent_id' => $states[$counter]['state_parent_id'],
            'country_id' => $countries[$counter]['country_id'],
            'country' => $countries[$counter]['country'],
        ]);

        $all_details = $all_details->push($full_location);
        $counter++;
    }

    return $all_details;
}
}

Vue Component

<template>
<div>
    <label for="searchquery">Town</label>
    <input type="text" v-model="searchquery" v-on:keyup="getLocations" class="form- 
control">
    <div class="panel-footer" v-if="data_results.length">
        <ul class="list-group">
            <a href="#" @click="setLocation(result)" class="list-group-item list- 
group-item-action" v-for="result in data_results" :key="result.id">{{ result.location 
}}, {{ result.state }}, {{ result.country }}</a>
        </ul>
    </div>
</div>
</template>
<script>
export default {
    data() {
    return {
        searchquery: '',
        data_results: []
    }
},
methods: {
    getLocations() {
        this.data_results = [];
        if (this.searchquery.length > 1) {
            axios.get('/get-locations', { params: { searchquery: this.searchquery } })
                .then(response => {
                    console.log(response);
                    this.data_results = response.data;
                });
        }
    },
    setLocation(result) {
        this.searchquery = result.location + ', ' + result.state + ', ' + result.country;
        this.data_results = [];
    }
},
}
</script>

两者看起来都一样。有什么区别吗？是一个更快，等等吗？