如果值包含对象数组中的字符串+数字

Question

I have an array like this:

array[
{name:test},
{name:test1},
{name:test2}
]

I have the str and n variables

let str = 'test';
let n = 1;

let obj = array.some(o => o.name.includes(str + n));
//check if string exist in array + n

if (obj === true) ++n
else str += n
 
console.log(str) // 'test'

the idea is that I want to check if string(test) exist in array of objects, if it exists I should add number, if it does not exist, then I should not add number

what i should get: 
if let str = "test" - console.log(str) // 'test3'
if let str = "test2" - console.log(str) // 'test2_1'

I just try to use:

  for (i = 0; i < array.length; i++) {
              let obj = array[i].name.includes(str + n)
                while (obj === true) n++
                str += n
      }
console.log(str) // test111

Answer 1

You can use .filter()

 let array = [ {name:'test'}, {name:'test1'}, {name:'test2'} ]; let str = 'test', currentStr = 'test'; let n = 1; if (array.filter((item) => item.name === str).length) { currentStr = str + n++; } while (array.filter((item) => item.name === currentStr).length) { currentStr = str + n++; } console.log(currentStr);

Answer 2

function placeHolder(arg) {
    for (let i = 0; i < arg.length; i++) {
        if(parseInt(arg[i].name.slice(-1))) {
            continue;
        } else {
            arg[i].name = arg[i].name + (i + 1) 
        }
    }

    return arg;
}