# Array find

Arrays are usually referred to as lists. For convience, lets call them arrays in this article.

Python has a method to search for an element in an array, known as index().
We can find an index using:

```x = ['p','y','t','h','o','n'] print(x.index('o'))```

If you would run x.index(‘p’) you would get zero as output (first index).

Array duplicates: If the array contains duplicates, the index() method will only return the first element.

#### Find multiple occurences

If you want multiple to find multiple occurrences of an element, use the lambda function below.

`get_indexes = lambda x, xs: [i for (y, i) in zip(xs, range(len(xs))) if x == y]`

#### Find in string arrays

To find an element in a string array use:

```x = ["Moon","Earth","Jupiter"] print(x.index("Earth"))```

You could use this code if you want to find multiple occurrences:

```  x = ["Moon","Earth","Jupiter","Neptune","Earth","Venus"] get_indexes = lambda x, xs: [i for (y, i) in zip(xs, range(len(xs))) if x == y] print(get_indexes("Earth",x))```

#### Find in numeric array

The index method works on numeric arrays too:

```x = [5,1,7,0,3,4] print(x.index(7))```

To find multiple occurrences you can use this lambda function:

```  x = [5,1,7,0,3,4,5,3,2,6,7,3,6] get_indexes = lambda x, xs: [i for (y, i) in zip(xs, range(len(xs))) if x == y] print(get_indexes(7,x))```