如何检查对象数组中包含的字符串

Question

Hi I want to check if a string is contained on an array of objects. I've tried some methods like indexOf or data.filter , but I can't find a better solution. My array looks like:

  0 [   {
    "date": "12/19/2014 12:00:00 AM",
    "type": "red",
     "name": "hert",
     "to": "418",
      "newitem": [
      {   
        "new": "gt",
        "level": "typeone",}]
}]

I want to know if the string "typeone" is inside the 0[] array.

I've tried try :

var result = $.grep(data[0].newitem, function(e){ return e.level =="typeone"; }); 

but I didn't get the answer.

Answer 1

您是否在寻找Array.some （ MDN ）

var result = data[0].newItem.some(function(obj) { return obj.level === 'typeone'})

Answer 2

这将返回true / false

var result = $.grep(data[0].newitem, function(e){ return e.level =="typeone"; }).length>0;

Answer 3

If you are trying to get the nested string from that object you are looking at doing this.

data[0].newitem[0].level

this will equal "typeone"

Your question is unclear. Another tip is to check the type of data with

//returns boolean
typeof Object === 'undefined'
typeof Object === 'Array'
typeof Object === 'String' 

Answer 4

Try this:

data[0].newitem.filter((e) => {return e.level == 'typeone'}).length

if length > 1 //string is present

Answer 5

Try this:

 var arr = [{ "date": "12/19/2014 12:00:00 AM", "type": "red", "name": "hert", "to": "418", "newitem": [ { "new": "gt", "level": "typeone" }] }]; console.log(containsString(arr, "typeone")); // contains "typeone" --> true function containsString(arr, strSearch) { var same = false; for (var p in arr) { var entry = arr[p]; var type = toString.call(entry); if (type.indexOf("Object") > -1 ? true : type.indexOf("Array") > -1 ? true : false) { return containsString(entry, strSearch); } else { same = (entry === strSearch); if (same) return same; } } // end for loop return same; }// end iterate