JAVASCRIPT

javascript indexof with condition

a = [
  {prop1:"abc",prop2:"qwe"},
  {prop1:"bnmb",prop2:"yutu"},
  {prop1:"zxvz",prop2:"qwrq"}
];
    
index = a.findIndex(x => x.prop2 ==="yutu");

console.log(index);

indexof javascript

var str = "Please locate where 'locate' occurs!";

var ind1 = str.indexOf("locate"); // return location of first value which founded
var ind2 = str.lastIndexOf("locate"); // return location of last value which founded
var ind3 = str.indexOf("locate", 15); // start search from location 15 and then take first value which founded
var ind4 = str.search("locate");
//The search() method cannot take a second start position argument. 
//The indexOf() method cannot take powerful search values (regular expressions).

document.write("<br>" + "Length of string:", len);
document.write("<br>" + "indexOf:", ind1);
document.write("<br>" + "index of last:", ind2);
document.write("<br>" + "indexOf with start point:", ind3);
document.write("<br>" + "search:", ind4);

indexOf

/*To search for the index of a substring or string within an array, 
use .indexOf() 
If you search for something that isn't there, the function will return -1*/

let mechs = ["madcat", "blood asp", "atlas"];
console.log(mechs.indexOf("madcat"); //returns 0
console.log(mechs.indexOf("atlas"); //returns 2

let clan = "nova cat";
console.log(clan.indexOf("a")); /*returns 3 (Only the first instance of the
character is used.*/
console.log(clan.indexOf("cat")); /*returns 5 (Finds the index of the beginning
character)*/
console.log(clan.indexOf("s")); //returns -1

indexOf()

let str = "Please locate where 'locate' occurs!";
str.indexOf("locate");

//it will returns the index of (the position of) the first occurrence of a specified text in a string:
// >> 7

//if you find this answer is useful ,
//upvote ⇑⇑ , so can the others benefit also . @mohammad alshraideh ( ͡~ ͜ʖ ͡°)

indexof js

const fruits = ["apple", "banana", "cantaloupe", "blueberries", "grapefruit"];

const index = fruits.findIndex(fruit => fruit === "blueberries");

console.log(index); // 3
console.log(fruits[index]); // blueberries

indexof javascript

Array.indexOf(searchElement, fromIndex)

indexof javascript

arr.indexOf(searchElement[, fromIndex])

indexOF

public int indexOf(int value)
    {
        int index = -1;
        for (int i = 0; i < size; i++)
        {
            if (elementData[i] == value)
            {
                index = i;
            }
        }
        return index;
    }

.indexof() in javascript

var str = "We got a poop cleanup on isle 4.";
var strPos = str.indexOf("5");//9

Indexof method javascript

// indexOf method only requires a single value 
// and returns the index of the FIRST value found in array
const cities = [
  "Orlando",
  "Dubai",
  "Denver",
  "Edinburgh",
  "Chennai",
  "Accra",
];

console.log(cities.indexOf("Chennai"));
// expected output is 4