有可能以某种方式缩短switch语句吗？ 也许有一个循环？

Question

Independent of which programming language, what options are there to shorten long switch statements with many similar cases?

From what I've searched, I found answers like this one but my cases are all different with only one integer changing like in a loop.

Regularly I use following switch statement construct in bash/PHP/Python/JavaScript and am looking for a shorter version:

switch ($device) {
    // 2ghz
    case "n2":
        return 1;
        break;
    case "nne2":
        return 2;
        break;
    case "ne2":
        return 3;
        break;
    case "ene2":
        return 4;
        break;
    case "e2":
        return 5;
        break;
    case "ese2":
        return 6;
        break;
    case "se2":
        return 7;
        break;
    case "sse2":
        return 8;
        break;
    case "s2":
        return 9;
        break;
    case "ssw2":
        return 10;
        break;
    case "sw2":
        return 11;
        break;
    case "wsw2":
        return 12;
        break;
    case "w2":
        return 13;
        break;
    case "wnw2":
        return 14;
        break;
    case "nw2":
        return 15;
        break;
    case "nnw2":
        return 16;
        break;

    // 5ghz
    case "n5":
        return 17;
        break;
    case "nne5":
        return 18;
        break;
    case "ne5":
        return 19;
        break;
    case "ene5":
        return 20;
        break;
    case "e5":
        return 21;
        break;
    case "ese5":
        return 22;
        break;
    case "se5":
        return 23;
        break;
    case "sse5":
        return 24;
        break;
    case "s5":
        return 25;
        break;
    case "ssw5":
        return 26;
        break;
    case "sw5":
        return 27;
        break;
    case "wsw5":
        return 28;
        break;
    case "w5":
        return 29;
        break;
    case "wnw5":
        return 30;
        break;
    case "nw5":
        return 31;
        break;
    case "nnw5":
        return 32;
        break;

    // 24ghz
    case "n24":
        return 33;
        break;
    case "nne24":
        return 34;
        break;
    case "ne24":
        return 35;
        break;
    case "ene24":
        return 36;
        break;
    case "e24":
        return 37;
        break;
    case "ese24":
        return 38;
        break;
    case "se24":
        return 39;
        break;
    case "sse24":
        return 40;
        break;
    case "s24":
        return 41;
        break;
    case "ssw24":
        return 42;
        break;
    case "sw24":
        return 43;
        break;
    case "wsw24":
        return 44;
        break;
    case "w24":
        return 45;
        break;
    case "wnw24":
        return 46;
        break;
    case "nw24":
        return 47;
        break;
    case "nnw24":
        return 48;
        break;

    default:
        return 0;
        break;
}

Answer 1

Thank you very much for your contributions, I could come up with following examples. I hope they are the shortest possible variants for their language, if not, feel free to edit/correct.

Python dev2host.py:

#!/usr/bin/env python
def dev2host(device):
    devices = [
        "n2", "nne2", "ne2", "ene2", "e2", "ese2", "se2", "sse2", "s2", "ssw2", "sw2", "wsw2", "w2", "wnw2", "nw2", "nnw2", # 2ghz
        "n5", "nne5", "ne5", "ene5", "e5", "ese5", "se5", "sse5", "s5", "ssw5", "sw5", "wsw5", "w5", "wnw5", "nw5", "nnw5", # 5ghz
        "n24", "nne24", "ne24", "ene24", "e24", "ese24", "se24", "sse24", "s24", "ssw24", "sw24", "wsw24", "w24", "wnw24", "nw24", "nnw24", # 24ghz
    ]
    for host, key in enumerate(devices, start=1):
        if device == key:
            print host
        result = 0
    return;
dev2host("ne5")

PHP dev2host.php:

<?php
function dev2host($device) {
    $devices = [
        "n2", "nne2", "ne2", "ene2", "e2", "ese2", "se2", "sse2", "s2", "ssw2", "sw2", "wsw2", "w2", "wnw2", "nw2", "nnw2", // 2ghz
        "n5", "nne5", "ne5", "ene5", "e5", "ese5", "se5", "sse5", "s5", "ssw5", "sw5", "wsw5", "w5", "wnw5", "nw5", "nnw5", // 5ghz
        "n24", "nne24", "ne24", "ene24", "e24", "ese24", "se24", "sse24", "s24", "ssw24", "sw24", "wsw24", "w24", "wnw24", "nw24", "nnw24", // 24ghz
    ];
    if ($host = array_search($device, $devices)) {
        return $host+1;
    }
}
echo dev2host("ne5");
?>

Bash dev2host.sh:

#!/bin/bash
function dev2host() {
    declare -A devices=(
        [n2]='1' [nne2]='2' [ne2]='3' [ene2]='4' [e2]='5' [ese2]='6' [se2]='7' [sse2]='8' # 2ghz
        [s2]='9' [ssw2]='10' [sw2]='11' [wsw2]='12' [w2]='13' [wnw2]='14' [nw2]='15' [nnw2]='16' # 2ghz
        [n5]='17' [nne5]='18' [ne5]='19' [ene5]='20' [e5]='21' [ese5]='22' [se5]='23' [sse5]='24' # 5ghz
        [s5]='25' [ssw5]='26' [sw5]='27' [wsw5]='28' [w5]='29' [wnw5]='30' [nw5]='31' [nnw5]='32' # 5ghz
        [n24]='33' [nne24]='34' [ne24]='35' [ene24]='36' [e24]='37' [ese24]='38' [se24]='39' [sse24]='40' # 24ghz
        [s24]='41' [ssw24]='42' [sw24]='43' [wsw24]='44' [w24]='45' [wnw24]='46' [nw24]='47' [nnw24]='48' # 24ghz
    )
    echo "${devices[$1]}"
}
dev2host ne5

Javascript dev2host.js:

function dev2host($device) {
    var devices = {
        "n2":1, "nne2":2, "ne2":3, "ene2":4, "e2":5, "ese2":6, "se2":7, "sse2":8, // 2ghz
        "s2":9, "ssw2":10, "sw2":11, "wsw2":12, "w2":13, "wnw2":14, "nw2":15, "nnw2":16, // 2ghz
        "n5":17, "nnw5":18, "ne5":19, "ene5":20, "e5":21, "ese5":22, "se5":23, "sse5":24, // 5ghz
        "s5":25, "ssw5":26, "sw5":27, "wsw5":28, "w5":29, "wnw5":30, "nw5":31, "nnw5":32, // 5ghz
        "n24":33, "nnw34":34, "ne24":35, "ene24":36, "e24":37, "ese24":38, "se24":39, "sse24":40, // 24ghz
        "s24":41, "ssw24":42, "sw24":43, "wsw24":44, "w24":45, "wnw24":46, "nw24":47, "nnw24":48, // 24ghz
    };
    var host=devices[$device] || 0;
    return host;
}
document.write(dev2host("ne5"));

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