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.

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...

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

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).

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 …

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 …

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"));

I've been looking through some js source and found someone using the indexOf() method. However, instead of passing a single parameter, they passed two like this: string.indexOf(a,5) where 'a' was a

Dec 27, 2013 · The .indexOf() method has an optional second parameter that specifies the index to start searching from, so you can call it in a loop to find all instances of a particular value: