Question

我有这个数组，怎样才能避免else语句发生在数组中的数量

             SoftwareBadges =
            [
{ Title: "Playtech", Guid: "7e9", xPos: "96" },
{ Title: "BetSoft", Guid: "890", xPos: "169" },
{ Title: "WagerWorks", Guid: "35c", xPos: "242" },
{ Title: "Rival", Guid: "c35", xPos: "314" },
{ Title: "NetEnt", Guid: "59e", xPos: "387" },
{ Title: "MicroGaming", Guid: "19a", xPos: "460" },
{ Title: "Cayetano", Guid: "155", xPos: "533" },
{ Title: "OpenBet", Guid: "cfe", xPos: "607" },
{ Title: "RTG", Guid: "4e6", xPos: "680" },
{ Title: "Cryptologic", Guid: "05d", xPos: "753" },
{ Title: "CTXM", Guid: "51d", xPos: "827" },
{ Title: "Sheriff", Guid: "63e", xPos: "898" },
{ Title: "Vegas Tech", Guid: "a50", xPos: "975" },
{ Title: "Top Game", Guid: "0d0", xPos: "1048" },
{ Title: "Party Gaming", Guid: "46d", xPos: "1121" }
            ];

            for (var s in SoftwareBadges) {
                if (SoftwareBadges[s]["Guid"] == "7e9"){
                   alert(SoftwareBadges[s]["Title"]);
                }
            else{alert('fdsfsdf');}
            }

Answer 1

使用Array.find（）。它返回满足回调条件的第一个元素，并将停止迭代其余元素。

SoftwareBadges =
            [
{ Title: "Playtech", Guid: "7e9", xPos: "96" },
{ Title: "BetSoft", Guid: "890", xPos: "169" },
{ Title: "WagerWorks", Guid: "35c", xPos: "242" },
{ Title: "Rival", Guid: "c35", xPos: "314" },
{ Title: "NetEnt", Guid: "59e", xPos: "387" },
{ Title: "MicroGaming", Guid: "19a", xPos: "460" },
{ Title: "Cayetano", Guid: "155", xPos: "533" },
{ Title: "OpenBet", Guid: "cfe", xPos: "607" },
{ Title: "RTG", Guid: "4e6", xPos: "680" },
{ Title: "Cryptologic", Guid: "05d", xPos: "753" },
{ Title: "CTXM", Guid: "51d", xPos: "827" },
{ Title: "Sheriff", Guid: "63e", xPos: "898" },
{ Title: "Vegas Tech", Guid: "a50", xPos: "975" },
{ Title: "Top Game", Guid: "0d0", xPos: "1048" },
{ Title: "Party Gaming", Guid: "46d", xPos: "1121" }
            ];
            
let foundBadge = SoftwareBadges.find(badge => badge.Guid === '7e9');

console.log(foundBadge ? foundBadge : 'asdfads');

Answer 2

我猜你只想发一次警报，是吗？要做到这一点，你需要另一个变量，如：

SoftwareBadges =
[
{ Title: "Playtech", Guid: "7e9", xPos: "96" },
{ Title: "BetSoft", Guid: "890", xPos: "169" },
{ Title: "WagerWorks", Guid: "35c", xPos: "242" },
{ Title: "Rival", Guid: "c35", xPos: "314" },
{ Title: "NetEnt", Guid: "59e", xPos: "387" },
{ Title: "MicroGaming", Guid: "19a", xPos: "460" },
{ Title: "Cayetano", Guid: "155", xPos: "533" },
{ Title: "OpenBet", Guid: "cfe", xPos: "607" },
{ Title: "RTG", Guid: "4e6", xPos: "680" },
{ Title: "Cryptologic", Guid: "05d", xPos: "753" },
{ Title: "CTXM", Guid: "51d", xPos: "827" },
{ Title: "Sheriff", Guid: "63e", xPos: "898" },
{ Title: "Vegas Tech", Guid: "a50", xPos: "975" },
{ Title: "Top Game", Guid: "0d0", xPos: "1048" },
{ Title: "Party Gaming", Guid: "46d", xPos: "1121" }
];

var enteredInElse = false;

for (var s in SoftwareBadges) {
    if (SoftwareBadges[s]["Guid"] == "7e9"){
        alert(SoftwareBadges[s]["Title"]);
    } else{ enteredInElse = true }
}
if(enteredInElse){
    alert('fdsfsdf');
}

避免在FOR循环中多次运行else语句？

2 个答案: