如何在也具有数组值的Object中搜索值？

Question

I've an object as below;

FOO: {
        BAR: [9,32,8,12 ],
        ZET: 4,
        BETA: [3,14,6,2],
        ALPHA: 37
    },

I need to search values of this object to match values with keys . There are tons of samples which gives keys with a singular value but I couldn't find any sample which also able to search in values those are in arrays.

How can I be able to search whole of those values of FOO object and match with keys ?

Note : The aim; I'll looking for an input and if given input is 2 then expect to get the key BETA or if given input is 4 then ZET .

So basically the values will be some pre-defined unique values already.

Answer 1

You could get the keys, create an array of values and check with includes . Return the found key.

 function find(object, value) { return Object .keys(object) .find(k => [].concat(object[k]).includes(value)); } var object = { FOO: { BAR: [9, 32, 8, 12], ZET: 4, BETA: [3, 14, 6, 2], ALPHA: 37 } }; console.log(find(object.FOO, 4)); console.log(find(object.FOO, 8)); 

Answer 2

You can do it with a simple for...in loop and .concAT() and .includes() methods of arrays:

 let obj = { BAR: [9,32,8,12 ], ZET: 4, BETA: [3,14,6,2], ALPHA: 37 }; let locator = (o, v) => { for (var prop in o) { if([].concat(o[prop]).includes(v)){ return prop; } } } console.log(locator(obj, 2)); console.log(locator(obj, 4)); 

Answer 3

Something like this should work:

 // What we're searching FOO = { BAR: [9,32,8,12 ], ZET: 4, BETA: [3,14,6,2], ALPHA: 37 }; function findValue(findValue, obj) { return Object.entries(FOO) .filter(([key,value]) => value === findValue || Array.isArray(value) && value.includes(findValue)) .map(([key,value])=> key); } function testfindValue(value, obj) { console.log("testfindValue: \\nInput: " + value, "Result: ", findValue(value,obj)); } testfindValue(4, FOO); testfindValue(6, FOO); testfindValue(32, FOO); testfindValue(99, FOO); 

Answer 4

You can simply loop though the object and search for the value to identify the key. If multiple matches are found, an array of keys that matches the result will be returned.

 function objSearch(key, obj) { const keys = []; for (let item in obj) { if (obj.hasOwnProperty(item)) { if (obj[item] === key || (Array.isArray(obj[item]) && obj[item].indexOf(key) > -1)) { keys.push(item); } } } return keys; } const obj = { FOO: { BAR: [9, 32, 8, 12], ZET: 4, BETA: [3, 14, 6, 2], ALPHA: 37 } }; const res1 = objSearch(14, obj.FOO); // Exist const res2 = objSearch(15, obj.FOO); // Does not exist const res3 = objSearch(37, obj.FOO); // Exist console.log(res1); console.log(res2); console.log(res3); 

Answer 5

Try this snippet,

I am checking conditions for object values whether its array or value and applied condition as per that. I kept parent key dynamic too.

 var abc = { FOO: { BAR: [9, 32, 8, 12], ZET: 4, BETA: [3, 14, 6, 2], ALPHA: 37 }, DAB: { DBAR: [9, 32, 8, 12], DZET: 4, DBETA: [3, 14, 6, 2], DALPHA: 37 }, }; function retTitle(abc, parent, k) { var title = ''; $.each(abc[parent], function(x, y) { if ((Array.isArray(y) && y.indexOf(k) != -1) || (!Array.isArray(y) && y == k)) { title = x; return; } }); return title; } var title = retTitle(abc, 'DAB', 4); console.log(title); 

Answer 6

You can use a simple for...in loop to iterate over keys. Then check if the value is a number and equals to what you look for. If it's not a number then it's an array - so you check that this array includes the number you are looking for.

 var FOO = { BAR: [9,32,8,12 ], ZET: 4, BETA: [3,14,6,2], ALPHA: 37 }; function findKeyByValue(obj, val) { for (var i in FOO) { if (!obj.hasOwnProperty(i)) continue; if (typeof FOO[i] === 'number') { if(FOO[i] === val) return i; } else { if(FOO[i].includes(val)) return i; } } } console.log(findKeyByValue(FOO, 4));