Using the indexOf method on an array of objects Asked 14 years, 1 month ago Modified 5 months ago Viewed 929k times

Jan 1, 2022 · The indexOf function of a string does not return a character but rather returns the position of the first place that string or character is found, not the character itself.

Dec 9, 2008 · If your situation requires the use of a regular expression, use the search() method, otherwise; the indexOf() method is more performant.

In javascript, is there an equivalent of String.indexOf (...) that takes a regular expression instead of a string for the first parameter, while still allowing a second parameter ? I need to do some...

Jan 26, 2026 · It counts the number of times e appears in the string overall, using string.indexOf to find each occurence. string.indexOf only returns the position of the first occurence of the character in the …

Jan 3, 2017 · Furthermore, indexOf () compares searchElement to elements of the Array using strict equality (the same method used by the === or triple-equals operator).

I am new to JavaScript. I have created a indexof function in but it is not giving the correct output: Question is: /* Implement a function called indexOf that accepts two parameters: a string and a …

Jun 15, 2018 · 0 indexOf() gives you the position of the element in the array and valid index of array starts from 0, 1, ... and so on till the array.length-1 so if the indexOf() would return 0 for non …

Dec 21, 2011 · I am learning Javascript and don't understand why the indexOf below returns -1: var string = "The quick brown fox jumps over the lazy dog"; console.log (string.indexOf("good"));

JavaScript indexOf method with multiple values Asked 9 years, 10 months ago Modified 4 years, 2 months ago Viewed 67k times