Get a sub array using array of indexes in one step

Question

In C#, given an array of integers that represents indexes of an array of items, is there a way to get a sub-array of the array of items that correspond to indexes in one step?

int[] indexesArray = {0,2,4,1};
string[] itemsArray = {"hi", "ciao", "yo"," hey","hello"};

string[] result = builtinMagic(itemsArray, indexesArray);

This is called slicing

Panagiotis Kanavos
– Panagiotis Kanavos

2017-06-14 10:37:06 +00:00
Commented Jun 14, 2017 at 10:37 — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Jun 14, 2017 at 10:37
Use a 2D/ multidimensional array?

fluffy
– fluffy

2017-06-14 10:37:47 +00:00
Commented Jun 14, 2017 at 10:37 — fluffy
– fluffy, Commented Jun 14, 2017 at 10:37

Patrick Hofman · Accepted Answer · 2017-06-14 10:38:02Z

5

You can simply Select the index from the indexesArray and then get the item at that specific index:

string[] result = indexesArray.Select(idx => itemsArray[idx]).ToArray();

answered Jun 14, 2017 at 10:38

Patrick Hofman

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2 Comments

Pikoh Over a year ago

You are too fast for me :)

Patrick Hofman Over a year ago

I have that a lot ;)

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