CODEWITHSUNDEEP
javascript
LoreleiRS
LoreleiRS

Reputation: 103

Passing two variables through the .indexOf() in javascript?

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 predefined string. What does this mean? Is it just indexing more than one parameter? Of so, what does it return?

Upvotes: 0

Views: 516

Answers (2)

Travis Michael Heller
Travis Michael Heller

Reputation: 1248

Maybe this will help.

string.indexOf(searchvalue,start);

searchvalue = Required. The string to search for

start = Optional. Default 0. At which position to start the search

Upvotes: 0

Alex Wayne
Alex Wayne

Reputation: 187134

From MDN docs:

arr.indexOf(searchElement[, fromIndex = 0])

Where fromIndex is defined as:

The index to start the search at. If the index is greater than or equal to the array's length, -1 is returned, which means the array will not be searched. If the provided index value is a negative number, it is taken as the offset from the end of the array. Note: if the provided index is negative, the array is still searched from front to back. If the calculated index is less than 0, then the whole array will be searched. Default: 0 (Entire array is searched).

So string.indexOf(a,5) will look for a in string starting at the character with index 5.

Upvotes: 1

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