Created
December 10, 2019 09:50
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var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; | |
var indexOfOne = array.indexOf(1); | |
var indexOfFive = array.indexOf(5); | |
var indexOfTwenty = array.indexOf(20); | |
console.log(indexOfOne); // 0 | |
console.log(indexOfFive); // 4 | |
console.log(indexOfTwenty); // -1 |
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