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我有一个值和一个数组。我正在尝试查看该值是否包含在数组中。我正在使用 jQuery 的“inArray”方法，但结果一直告诉我找不到它。我究竟做错了什么？

这是小提琴。 http://jsfiddle.net/p9xcb/

var array =  ["79C8A605-1384-4A51-8AC9-C53C1AE075D2", "E367CEEE-A344-4C63-B4B3-A1CC20D3DAF2", "1E3ED40E-935A-4895-960E-89FFD8CD81B9", "2E67F9E8-4770-497E-A938-0A145DA033AF", "35B33B09-6BD3-495E-9A3E-4B5D6DF8655E", "F419FB1F-4922-46B9-B651-8BB0D42510DD", "61FD263B-175E-4434-8A88-8E00418E2E14", null, "FF98229A-998C-49AD-9392-E4CE98115C0A", "C88B9D52-FE70-430C-B43D-D52F9B22E997", "1DDF2413-B453-42BB-8D78-7A7AAA94C353", "55D922B1-EBCD-4EC3-87A5-FA6AA38C9975", "0FA8079A-F76F-4CA5-B370-7B8B9AF2720A", "CF1971EF-E0C2-4C54-8131-A19FB14F2515", "A736854B-73A2-4282-85E0-6298D8AB815A", "DA280665-DC5E-4DF2-9FB1-924E1C8E4713", "9C73A934-9DDF-415C-A409-F2AC79493539", "FD950617-2C9C-4B6C-94F1-6C746699B636", "F184BBBE-C296-4F1D-9DD7-57F87D3B95A6", "676955FB-3F3D-4DC6-8F9D-A873A8440499", "5509E5C6-6650-4DF6-B7A9-49C8BC935B53", "7D88DCD6-431E-41EB-9A87-5C19C2D579FC", "509EA3D8-5B30-41F0-809B-D1E45BC30E3C", "6C4D6F4F-A188-4E6C-B40C-02AE4A5FFAAB", "710E2593-FE14-4CAB-B97C-95D96BB81266", "CBEB793E-A572-4995-8342-E9A48EF19E82", "A8C937F2-056C-46B4-8034-11CA4BB37A1D", "8E9B5E53-298B-4BDE-A696-20F102C28F12", "7BF7421C-CB21-4A44-BBA3-2CFD3A74C889", "F8D89224-7BB7-477F-BB8E-F5B2633A4111", "73F196CF-62F8-4F7A-9938-4F52404450E4", "B4D419D6-A5B8-4141-8C0E-ADCBEC72F2D8", "59ECF672-5C93-4E1E-8E30-6E0699874D61", "EC72A684-5888-48E1-99FD-FE455A50222F", "5D234D6D-E296-4D90-B87E-61FB6FB48702", "8EDD5718-E28A-4A4E-85BA-4DC9C072EAA8", "66FEA812-9945-4FFB-87CB-CCA828768FA0", "0025CB40-3016-4286-AD60-46685EDFD6A1", "508AC4D3-EA29-43A9-92CC-453FE2438D58", "030C5CBE-C227-4326-BED7-DB16A90D5A36", "2AAFF154-0FD0-4B60-9180-DE19A9E0890B", "64EBB0B4-81C1-46EB-8B1A-711A06E45FA3", "E1AA77B2-0E67-42A7-B7D7-A15D2A4EA448", "E9543440-E66E-4984-AC4E-091F161D33D6", "D93988D5-73D9-4988-B1A1-B48282F3C7B7", "6DC572B8-1F69-4A5C-81C7-6EAC617EBEE1", "BB56B36C-1D90-4B8D-ABF0-4ECD4052DCC1", "D1FEFB8D-84F4-4500-92F2-70FEE23F4B6E", "3A836ED4-639C-42C4-B945-375DC053FB61", "33672786-E964-4C3F-A3EB-7BF6634D13A0", "7F76C892-AEC1-4901-80BE-B93DFF59D159", "0E92F1AD-5C09-4B3D-BAF5-5D62BA3440EF", "73E50616-DCA7-4E83-B81F-100C21A18C49", "CF89704A-BD58-4D41-A5B5-10BAFC6F8085", "0D5CBF2A-3699-4968-A2DC-F6EA61D6C7C1", "FED50D50-86E8-42E2-8CD4-17DC01BB966C", "81EEFFA0-D172-4BC3-8474-2C55E6CB06CA", "8FA6CBBD-D5AC-431D-B1E3-C0D1BA48ECCA", "7EEA9381-F0F0-4252-BF29-D15A5A0283C6", "0FFDE30B-E4C3-40CC-A292-566D54D05821", "E24EE39E-0FDE-4C20-B61C-E5C07B483CF8", "82F6B86F-6EAB-42B4-B19D-CA6EAFF83A92", "7B663073-6296-4A08-89AF-7051EAFC3E8A", "EA36E8B5-A266-473C-A076-96A605A856B9", "4A99A5A0-FBF3-4AC6-A34A-52E761B98C8A", "26513617-D98B-44D9-BDD5-2FFCB8C7783B", "67F93D0F-E145-4447-A7B8-E3D1E944B88C", "9798FD1D-B781-4420-A37E-622E04E69672", "1A872624-E81B-45B7-B6FD-ED229AE54042", "092C0992-FAED-4E74-AB3E-6553F5261EF2", "76B94E6B-BE6B-43F2-ABBD-67A3B92C33B9", "AADF1B4D-F32E-4C0C-B4FC-EAC051338B8C", "E8A2479D-B1FC-4B67-AC94-C1AB8E1C7298", "8F7350C0-867D-461A-92D9-225CF8E91D60", "E742D55B-ADF0-4ADF-A3C9-EC4B3BAA832A", "320EBB4F-F0AB-47E7-A5B6-334429F8DEC8", "CEF5D66B-5EF2-468B-A9BE-06B0BC05E917", "CC6D2205-EB58-414D-A404-ED7B743E385E", "7D7EB4D0-BE31-4F28-928D-8E1FC5C947F0"];

var value = "CC6D2205-EB58-414D-A404-ED7B743E385E";

$('body').html($.inArray(value, array));​

编辑：

如果我运行此代码

if ($.inArray(value, array)) {/*this will never be called, why?*/}

我永远不会看到任何/*this will never be called, why?*/部分在哪里。

4

4 回答 4

1

$.inArray() 方法类似于 JavaScript 的原生 .indexOf() 方法，因为它在找不到匹配项时返回 -1。如果数组中的第一个元素与值匹配，则 $.inArray() 返回 0。

除此之外，还inArray返回事件的索引。

于 2012-11-01T16:22:06.407 回答
1

这可能是你的问题。在 javascriptif (0)中将与 相同if (false)，并且if (-1)与if (true). 你需要使用

if ($.inArray(value, array) >= 0)
于 2012-11-01T16:28:47.827 回答
1

您应该首先了解javascript中真假的概念。以下值将在布尔运算符内部评估为 false

undefined
null
empty string
false
0

以下将评估为真

non-null object reference
non-empty string
true
any non-zero number

现在你看到问题了吗

if($.inArray(value,array)){

}

提示：未找到元素 (-1) 将评估为真，在第一个位置 (0) 找到元素将评估为假。在第一个之后的任何元素中查找值将评估为真。

简单的解决方法是使用：

if ($.inArray(value, array) >= 0)
于 2012-11-01T16:52:30.607 回答
0 
check = function (arr,val)
{
    for(i = 0; i < arr.length;i++){
        try{
         if(arr[i].indexOf(val) != -1){
            return i;           
        }
        }catch(e){}
    }
    return -1;
}

像这样使用它check(array,value);

于 2012-11-01T16:22:12.990 回答