Question

如何合并两个像这样的数组

$letters = ["A","B","C"];
$words = ["Alpha","Bravo","Charlie"];

放入一系列地图

$result = [
    ["letter" => "A", "word" => "Alpha"],
    ["letter" => "B", "word" => "Bravo"],
    ["letter" => "C", "word" => "Charlie"]];

尽可能高效，整洁地尝试了内置函数，但似乎找不到任何帮助。

Answer 1

您可以使用array_map遍历数组，例如：

$letters = ["A","B","C"];
$words = ["Alpha","Bravo","Charlie"];

$result = array_map(function( $letter, $word ){
    return [ 'letter' => $letter, 'word' => $word ];
}, $letters, $words);

这将导致：

Array
(
    [0] => Array
        (
            [letter] => A
            [word] => Alpha
        )

    [1] => Array
        (
            [letter] => B
            [word] => Bravo
        )

    [2] => Array
        (
            [letter] => C
            [word] => Charlie
        )

)

Answer 2

如果您想要单线，

from channels.generic.websocket import AsyncWebsocketConsumer
import json
import asyncio

isconnected = 0
class ChatConsumer(AsyncWebsocketConsumer):
    async def connect(self):
        print("connect")
        await self.accept()
        while isconnected == 1:
            await asyncio.sleep(2)
            print("true")
            # obj = # do_something (Ex: constantly query DB...)

            await self.send(text_data=json.dumps({
                'message': "aaa"
            }))

    async def disconnect(self, close_code):
        # Leave room group
        pass

    async def receive(self, text_data):
        # Receive message from WebSocket
        .....

array_map —将回调应用于给定数组的元素
array_combine —通过使用一个数组作为键并使用另一个数组作为其值来创建数组

Demo

输出：-

$temp=array_map(function($l,$w){return array_combine(['letter','word'],[$l,$w]);},$letters,$words);

Answer 3

有一种a1 = -9.9985, -9.9996; a2 = 1.0121, 1.0245; a3 = 12.023, 12.597方法，但我喜欢这种方法，因为它更加扎根，而且可能更明确（至少对我而言）：

array_map()

Answer 4

Foreach将这样做：

{
    "$id": "1",
    "innerException": null,
    "message": "The feature is disabled. Contact your Azure DevOps Server administrator.",
    "typeName": "Microsoft.TeamFoundation.Framework.Server.FeatureDisabledException, Microsoft.TeamFoundation.Framework.Server",
    "typeKey": "FeatureDisabledException",
    "errorCode": 0,
    "eventId": 3000
}

输出：

foreach($letters as $k => $letter)
    $output[] = ['letter' => $letter, 'word' => $words[$k]];

var_export($output);

将2个数组合并为一个映射数组

4 个答案: