make indexof in js

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Aurélie
26 Apr 2019
1//indexOf getting index of array element, returns -1 if not found
2var colors=["red","green","blue"];
3var pos=colors.indexOf("blue");//2
4
5//indexOf getting index of sub string, returns -1 if not found
6var str = "We got a poop cleanup on isle 4.";
7var strPos = str.indexOf("poop");//9
Elias
14 Feb 2019
1function indexOf(arr, value) {
2  for (let [i, e] of arr.entries()) {
3    if (value == e) return i;
4  }
5  return -1;
6}
7indexOf([1,2,3], 2);                     //returns 1
Kiara
21 Aug 2020
1const fruits = ["apple", "banana", "cantaloupe", "blueberries", "grapefruit"];
2
3const index = fruits.findIndex(fruit => fruit === "blueberries");
4
5console.log(index); // 3
6console.log(fruits[index]); // blueberries
7
Eduardo
19 Jan 2018
1Array.indexOf(searchElement, fromIndex)
2
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