Question

您好我想检查对象数组中是否包含字符串。我尝试了一些方法，例如indexOf或data.filter，但我无法找到更好的解决方案。我的数组看起来像：

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

我想知道字符串＆＃34; typeone＆＃34;在0 []数组内。

我尝试过尝试：

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

但我没有得到答案。

Answer 1

您是否正在寻找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

如果您尝试从该对象获取嵌套字符串，那么您正在考虑这样做。

data[0].newitem[0].level

这将等于“typeone”

你的问题不清楚。另一个提示是使用

检查数据类型

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

Answer 4

试试这个：

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
Bundler could not find compatible versions for gem "logstash":
  In Gemfile:
    logstash-filter-cipher (>= 0) java depends on
      logstash (< 2.0.0, >= 1.4.0) java
Could not find gem 'logstash (< 2.0.0, >= 1.4.0) java', which is required by gem 'logstash-filter-cipher (>= 0) java', in any of the sources.

data[0].newitem.filter((e) => {return e.level == 'typeone'}).length //字符串存在

Answer 5

试试这个：

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

如何检查字符串包含在一个对象数组中

5 个答案: