Top "Indexof" questions

How to find the array index with a value?

Say I've got this imageList = [100,200,300,400,500]; Which gives me [0]100 [1]200 etc. Is there any way in JavaScript to return the index with …

javascript arrays indexof

How to trim a file extension from a String in JavaScript?

For example, assuming that x = filename.jpg, I want to get filename, where filename could be any file name (Let's …

javascript replace substring substr indexof

Where is Java's Array indexOf?

I must be missing something very obvious, but I've searched all over and can't find this method.

java arrays indexof

Index of element in NumPy array

In Python we can get the index of a value in an array by using .index(). But with a NumPy …

python arrays numpy indexing indexof

Get value of a string after last slash in JavaScript

I am already trying for over an hour and cant figure out the right way to do it, although it …

javascript substring indexof slash

How to get the index of an element in an IEnumerable?

I wrote this: public static class EnumerableExtensions { public static int IndexOf<T>(this IEnumerable<T> obj, …

c# .net linq ienumerable indexof

In an array of objects, fastest way to find the index of an object whose attributes match a search

I've been surfing around a little trying to find an efficient way to do this, but have gotten nowhere. I …

javascript arrays indexof

Is there a version of JavaScript's String.indexOf() that allows for regular expressions?

In javascript, is there an equivalent of String.indexOf() that takes a regular expression instead of a string for the …

javascript regex indexof

Getting Index of an item in an arraylist;

I have a Class called AuctionItem. The AuctionItem Class has a method called getName() that returns a String. If I …

java arraylist find element indexof

How to find indices of all occurrences of one string in another in JavaScript?

I'm trying to find the positions of all occurrences of a string in another string, case-insensitive. For example, given the …

javascript regex string indexof